Home Technology About us Contact us FAQ News Market Tech Advantages Tech Presentation Licensing Portfolio Fuel Efficiency Knowledge Base

 


AB Engine Incorporated, developer of the most efficient Internal Combustion Engine (ICE) theoretically possible, will be represented by ICAP Patent Brokerage, the world's largest intellectual property brokerage and patent auction firm, in the licensing and/or sale of its patent portfolio: http://www.abengine.com/LicensingPortfolio.htm

 The AB Engine portfolio discloses a high-efficiency Internal Combustion Engine (ICE), with increased efficiency and power output 20-40% over existing ICE technology.  In addition to marked improvements in efficiency and power output, the AB Engine method reduces noise, engine temperature and exhaust gas pressure, while increasing linear output power with respect to RPM. Moreover, the AB Engine is compatible with different fuel types and intake gas conditions, as well as Hybrid and Turbocharged engine designs. The AB Engine improves both efficiency and performance without the disadvantages of alternative designs which involve complex mechanical solutions.

 To learn more about AB Engine technology, please, visit webpage www.abengine.com or contact company representative Alexander Bakharev abakharev@abengine.com

If you are interested in licensing the technology or purchasing the patent portfolio, please contact ICAP Patent Brokerage:

Jesse Pakin, CIO, ICAP Patent Brokerage
917.903.9447
jesse@icapip.com
http://icappatentbrokerage.com

Visits since June 2, 2016:       Hit Counter


 

 

AB Engine Incorporated introduces a New Method (AB Engine Method) to convert burning gasoline, gas or diesel fuels into mechanical energy while still within the bounds of the conventional Otto, Miller, Diesel or similar internal combustion engine (ICE) design constraints. The new method allows for an ICE design with the highest fuel efficiency theoretically possible.

To learn about AB Engine Advantages please visit Tech Advantages page.

AB Engine was granted by two US Patents: #8,086,386 December 27, 2011   (PDF) and  #8,396,645 March 12, 2013

    The Company has also China patents #ZL 2008 8 0100951.9 November 14,2012 and patent pending in Europe.

In February 2012, AB Engine Inc. announced that it has designed and completed a high fuel efficiency internal combustion engine (ICE) prototype in order to demonstrate the "proof of principles" behind the AB Engine Technology. Testing the novel AB Engine method and design with an 87 octane rating  gasoline yielded 44% (with 28% theoretical prediction) higher fuel efficiency in comparison to a similar conventional engine design (see News & Media  for details).

 

To see AB Engine Method, please, refer to technology page and technology presentation and technology advantages

The AB Engine technology will also improve the efficiency of today’s most efficient vehicle design, the Hybrid design. The combination of the Hybrid design with the AB Engine technology will result in unparalleled mileage per gallon improvements. Implementing AB Engine technology in turbo-charged engines, Miller type, will deliver powerful and improved efficiency engines as well.

 

 

 

 

 

 


"High Efficiency and high power density Internal Combustion Engine" Patents Portfolio For Sale

 

AB Engine Incorporated has prepared an Intellectual Property (IP) package for sale to be made available to all interested parties.

AB Engine Incorporated is proposing a unique opportunity to internal combustion gasoline and diesel engine designers as well as manufacturers to possess the patented design method that allows for the most efficient internal combustion engine theoretically possible.

 

With patent priority as of May 29, 2007, this IP portfolio covers multiple possible patent infringements and allows for 13 more years of proprietary design in the vast market where internal combustion engines are used.   Mimicking efficiency of the theory behind the Atkinson engine method, the AB Engine method provides the same or greater fuel efficiency for gasoline and diesel based engines without the mechanical complications associated with the Atkinson design.  The uniquely designed and electronically controlled intake valves provide enormous variety in engine optimization options related to fuel efficiency and power output.  The IP package also protects a unique engine configuration with exhaust gases heat recovery and a single electrical or mechanical output, giving an opportunity to the engine designer to further increase an engine’s efficiency and power output. 

 

This is a unique opportunity for those conducting business related to engines in the automotive, marine and electric generators industries as well as numerous other areas where engines are in use.  

 

Please visit a page that explains the AB Engine technology advantages here

 

 

Please call 518-557-3510 with any questions or contact us email: contact@abengine.com.

NOVELTY
TECHNIQUES (METHODS) TO OPTIMIZE EXISTING INTERNAL COMBUSTION ENGINE’S EFFICIENCY AND PERFORMANCE

 

IMPORTANCE
STRATEGIC IP FOR AUTO, POWER GENERATOR, MACHINERY, AND SHIP BUILDING ENGINE MANUFACTURERS and DESIGNERS

 

FUEL-EFFICIENT INTERNAL COMBUSTION ENGINE 

Since it was first developed more than a century ago, the performance of internal combustion engines (ICE) has suffered from low thermal efficiency mostly due to the low compression-expansion ratios of burnt fuels.  AB Engine Incorporated introduces an innovative method that more efficiently converts thermal energy from burned gas, gasoline and diesel fuels into mechanical energy without exceeding the constraints of conventional ICE designs (e.g., Otto and Miller)

 

VALUE PROPOSITION 
The disclosed portfolio describes the most efficient ICE engine theoretically possible, proposing a method that will increase efficiency 20-45% over existing ICE technology.  In addition to improvements in fuel efficiency, the AB Engine method reduces noise, engine temperature and exhaust gas pressure, while increasing linear output power with respect to RPM. Moreover, the AB Engine is compatible with different fuel types and intake gas conditions, as well as the Hybrid and Turbocharged engine designs. The AB Engine improves both fuel efficiency and performance without the disadvantages of alternative designs (e.g. Otto, Miller and Atkinson) which involve complex mechanical solutions.

Priority Date: 05-29-2007

 

List of “IP”

The IP portfolio is a bundle of US and China patents and a European patent application related to the same invention:

 

1.      US patent #8,086,386

Title: "High efficiency Internal Combustion engine”

Inventor: Alexander Bakharev

Priority: U.S. Serial No. 12/129,595 (3136.001), filed May 29, 2008, which claims priority to U.S. Prov. Appl. No. 60/940,646, filed May 29, 2007

U.S. Serial No.: 13/300,133  

 

2.      U.S. Continuation Patent #8,396,645 March 12, 2013

Title: HIGH EFFICIENCY INTERNAL COMBUSTION ENGINE

Inventor: Alexander Bakharev

Priority: U.S. Serial No. 12/129,595 (3136.001), filed May 29, 2008, which claims priority to U.S. Prov. Appl. No. 60/940,646, filed May 29, 2007

U.S. Serial No.: 13/300,133

 

3.      European Application “High efficiency Internal Combustion engine” No. 08769823.9 filed December 28, 2009 based on PCT Appl. No. PCT/US2008/065161 filed May 29, 2008

4.      Chinese Patent # ZL 2008 8 0100951.9. November 14, 2012 based on Application “High efficiency Internal Combustion engine” No. 200880100951.9 international filling date January 29, 2010 based on PCT Appl. No. PCT/US2008/065161 filed May 29, 2008

 

The patents and patent application are all assigned to AB Engine Incorporated.  The buyer has to send the owner (company or person) all requested information including the address where documents have to be sent and whom to transfer the patents and patent application ownership to.  The ownership transfer will be managed by the AB Engine Incorporated patent counsel:  

 

Heslin Rothenberg Farley & Mesiti P.C.

Attorney at Law Victor Cardona

5 Columbia Circle

Albany, New York, 12203

Telephone: +1 (518) 452-5600

Fax: +1 (518) 452-5579


 

 

 


AB Engine Fuel Efficiency 

 

Calculation of efficiency of AB Engine and its comparison with the conventional engine. 

Lets fist derive the expression for conventional engine, which is based on a standard Otto cycle.

 Using notations in Fig.1 for conventional Otto cycle, the efficiency η can be expressed as follows: 

         (1)

The fact that compression and expansion ratios are equal in conventional engine leads to the following relation: 

                  (2)

 

Where r is a compression ratio for conventional Otto cycle, k is an effective value of γ from formula (3) which is equal to 1.35 for typical air-fuel mixture.

 From (2) it follows that: 

                                                       (3)

                                                      (4)

                              (5)

 

From (1) and (5) we have: 

                                                     (6)

     

Picture 1. Efficiency of conventional Internal Combustion Engine

The above is a classical derivation based on the proportional relation between change in internal energy and change in temperature and can be found in numerous classical textbooks as well as in recent publications. The one given here was taken from the following reference: http://www.engr.colostate.edu/~allan/thermo/page5/page5.html

Picture 2. PV Diagram of the AB Engine 1-2-3-2-4-5-6-7-8-7 and

conventional engine 1-2-4-5-6-2 at maximum ICE cycle power

For the purpose of efficiency calculation in the proposed engine, it must be taken into consideration that the compression and expansion ratios are different. According to Picture 2, the gas is compressed above atmospheric pressure from volume V2 to V1 (trace 2-4), but expands from volume V1 to effective volume VE (trace 5-6-7). To account for this change the formula (1) must be modified as follows: 

                           (7)

The relation between temperatures and volumes during compression gives: 

                    (8)

where rC is the compression ratio for the proposed engine.

The similar relation for expansion gives: 

              (9)

where rE is the expansion ratio for the proposed engine.

Expressing T2 and TE from (7) and (8) and inserting them into (7) gives the following expression for η:

                                                (10)

Note that η now depends on the ratio T3 /T1, which has approximate value of 8 for most of typical gasoline engines. Assuming the compression ratio of best gasoline engines rC≈10 and twice higher expansion ratio of the proposed engine rE≈20, the value of η can be calculated as: 

          (11)

The same formula (10) can be used to calculate η for conventional engine, which gives: 

                                                                                   (12)

Note that this value is in a perfect agreement with a classical formula (6): 

                                (13)

Picture 3. The graph above shows how much an AB Engine can improve

fuel efficiency in comparison to a conventional engine with compression ratio r = 8

 


 


Advantages of AB Engine compared to conventional

Otto, Diesel, Miller or Atkinson engines 

 

Summary 

In this article we are explaining how AB engine cycle works compared to the conventional (Otto, Atkinson and Miller) engine cycles. The fuel efficiency of the AB engine is the same as in Atkinson, while avoiding its well-known disadvantages such as poor power density and complicated mechanical design that provides for a different piston stroke during intake and exhaust parts of a cycle. In AB engine one can achieve equally-impressive high power density and fuel efficiency without design complications. As an example, we are taking a typical Pontiac engine performance data and comparing it to simulated performance of the AB and Atkinson engines. Specifically, we simulated the modification of the Pontiac to the AB engine   by keeping the same combustion volume while increasing compression/expansion ratio by a factor of two and implementing secondary AB engine intake “time variable valve” controlled by a computer.  Figure 1 depicts power output in relative horsepower (HP) units   vs. revolves per minute (RPM), where   the maximum power output of Pontiac engine is taken to be equal to 1.0

Specific advantages detailed in this paper are as follows:  

  • The efficiency advantage of the AB engine cycle compared to a typical Otto (Diesel) or Miller cycles;

  • The advantage of using Secondary AB engine intake valve;

  • The advantage of using specifics of the AB engine intake cycle in combination with “time variable valve” to compensate for the intake air flow resistance, achieving maximum volumetric efficiency and thus maximizing engine power density.  

AB engine cycle can be implemented in any adiabatic internal combustion engine including Diesel and Miller engines, and it can work with any type of fuel increasing both engine efficiency and power density.

Figure 1 shows the comparison of the AB engine and Atkinson power output curves

to a typical Pontiac engine power output curve

 

1. Fuel efficiency Advantage

When used in almost any adiabatic internal combustion engine (ICE), the proposed AB engine cycle will yield the same fuel efficiency advantages as the well-known Atkinson engine cycle [1], but with a significantly simpler mechanical design that enables a number of advantages.

Figure 2 (a) AB engine; (b) Atkinson engine

The above figure depicts AB engine (a) and Atkinson engine (b) cycles. In both cycles we show equivalent Otto (Diesel) cycle within the larger cycles, which is depicted by the blue area in Atkinson diagram, and as region 2-4-5-6 in AB engine diagram. In AB engine cycle we show equivalent Atkinson cycle as 1-2-4-5-6-7-1.

Additional energy produced by burning the same amount of fuel is shown as the red areas in the Atkinson diagram and as the green region 2-6-7 in the AB engine diagram. Even though calculations of fuel efficiency [2] are the same, the cycle and practical ways of achieving each cycle are different. Atkinson cycle uses complicated mechanical approach to create the necessary compression ratio depending on the fuel, while avoiding detonation, and creating increased expansion ratio in order to gain higher efficiency compared to Otto or Diesel cycles. In contrast, AB engine uses a thermodynamic approach that utilizes certain adiabatic parts of the engine cycle in order to achieve the same goal as in the Atkinson cycle without design complications. In fact, it uses almost the same simple engine configuration as Otto, Miller or Diesel engines. All advantages of the AB engine cycle stem from high compression/expansion ratio and from the application of a specific control of the air flow using secondary intake valve. This results in an optimal actual compression ratio for particular fuel and utilization of high expansion ratio for increasing the fuel efficiency.   

As we can see from Figure 2 (a), the difference in Atkinson cycle is the adiabatic expansion-compression part of the diagram depicted by 2-3-2. This part of a cycle doesn’t consume or produce any energy but plays a significant role in AB engine operations.   

More details on the differences of AB engine design compared to conventional and Atkinson engines can be found on our web page, in [3] as well as in  this document.

Efficiency of the AB engine cycle (as well as that of Atkinson’s ) is the highest theoretically possible for adiabatic ICE, mainly because of the possibility of expanding burnt gases up to the point where the exhaust  is at ambient environmental pressure.

2. AB Engine secondary intake valve advantages

One of the primary features of AB engine is a secondary intake valve that works differently from traditional engine valves. AB engine’s secondary valve performs under intake air pressure and temperature. This implies atmospheric pressure or below (for high altitudes). It may be also higher than atmospheric if used after a “turbocharger”, such as in Miller type engines. In any case, this pressure environment in which the valve operates is moderate; the AB engine secondary valve is not exposed to high temperatures and pressures as conventional intake valves implemented as a part of a combustion chamber. AB engine secondary valve can be easily manipulated by any kind of a drive, including electromagnetic, and can be designed with minimum air resistance. The valve only needs to be closed at specific piston positions and to be opened at any time by the controller after the intake cycle is completed.

Low working pressure and temperature open up a way of using this secondary valve as a simple time variable valve that can be controlled by a computer with algorithms that optimize engine performance.

One of the advantages of using AB engine secondary intake valve is in avoiding power output control by throttle. Manipulating power output by secondary valve, closing it at specific piston position restricting amount of intake air will put full intake cycle in adiabatic stage and avoid pumping losses caused by the throttle resistance.

3. AB Engine intake air flow resistance compensation advantages

Low volumetric efficiency (VE) is a well know problem for engines. AB engine intake air flow resistance compensation works keeping VE at 100% or even exceeding it (if needed) for the most of engine RPM range.

First we should explain what engine volumetric efficiency parameter means.

Volumetric efficiency in the internal combustion engine design is a ratio (or percentage) of the amount of air (oxidizing media) that is trapped by the cylinder during intake cycle, to the volume swept in the cylinder under static conditions. Usually, after reaching maximum value, VE decreases with increasing of RPM due to the air flow resistance caused by:

     air filter resistance

     throttle damper resistance

     aerodynamic resistance of manifolds

     intake valve  resistance

Volumetric efficiency is one of the most important engine parameters that are difficult to maintain at high levels in conventional Otto or Diesel engines. Below (Fig.3) is the typical VE/RPM diagram depicting two most important curves, the VE and engine torque as a function of the engine’s single cycle power output. As seen in Fig.3 below, the VE changes with RPM in a way similar to the torque, with some difference occurring at high RPM, where conditions for fuel burning are different from the ones at low RPM [4].

Figure 3 shows original chart [4] of illustration of fundamental relationship between peak

torque and peak volumetric efficiency (VE) with engine RPM

In Otto and Atkinson engines, the VE peaks and then drops, due to the air flow resistance created by reasons mentioned above. Note that the decrease in horsepower with RPM is about 90% due to the declining VE, which is clearly seen in Figure 3 (please read a NOTE below the chart).  This means that if we could keep the VE close to 100%, then the engine power output curve would continue to rise almost linearly with RPM. This would significantly increase the engine performance. One possible realization of this would be to use a turbocharger to increase air pressure and compensate for air flow resistance.

The addition of a turbocharger to the Otto engine represents the Miller cycle engine. However, increasing engine power density in Miller engines does not increase the fuel efficiency from fundamental (thermodynamic) point of view because of the same low expansion ratio of burnt gases. On the contrary, the AB cycle does increase engine efficiency as well as its power density.

Because of specific feature of the AB engine during intake cycle (2-3-2 Fig.1), where air trapped in combustion chamber has lower pressure than initial intake pressure, there is a possibility of “compensating for air flow resistance,” using AB engine secondary valve as a time variable valve. That represents a significant difference from Otto, Atkinson and Miller engine cycles. AB engine air flow compensation ability keeps the AB engine VE close to 100% for most reasonable engine RPM values without using a turbocharger. At the same time, AB cycle will improve Miller cycle as well, increasing its performance in terms of  fuel efficiency and power density.

We would like to point out that VE for an Atkinson engine with similar expansion volume as in the Pontiac engine will be the same as in Otto engine. This similarity is a cause of poor power density in an Atkinson engine, even though there are fuel efficiency advantages. Mechanical complications and poor power density makes Atkinson engine unattractive for many applications.

An example showing a modification of a conventional Otto engine into an AB engine configuration

Figure 4 Curves of VE and relative HP for a very typical Pontiac engine. The curves shown

in this figure are taken from Ref. [5]; here RPM = FPM×1.42

Using this Pontiac engine performance chart as an example; we will try to show how the engine will perform if we modify it to the AB engine configuration while keeping the same engine volume.

We can clearly see that after the VE value reaches its peak at 2000 FPM (about 2800 RPM) , the horsepower of the Pontiac engine starts declining together with VE. At about of 2800 FPM (about 4000 RPM) it reaches the maximum.

Possible modification of Pontiac engine into the AB engine is represented below, with conventional Otto engine shown on the right and the modified one on the left.

Figure 5 (Full description is at [3] slide 1) shows Otto (similar to Pontiac) engine on the right and

AB engine on the left. 

The modification includes:

1.   Increasing compression ratio by a factor of two (as an example), from the usual value of 8 to 16, which will increase efficiency by about 28% (see figure 6 below)  

2.     Implementing AB engine secondary intake valve.

3.     Implementing sensors for monitoring piston position, RPM, intake air pressure and intake air temperature.

4.     Implementing a computer that takes all these measured parameters and calculates the right moment for closing the AB engine valve, to keep the      compression    ratio (and thus VE) at an optimum value.

Figure 7 shows the result of the implementation of the AB engine cycle modifying Pontiac engine.

In order to reach the optimum compression ratio (such as ECR = 8 or other, depending on the fuel used), for example having ECR = 16, we need to close the AB engine secondary valve at a volume V2 (see Fig. 8) that corresponds to the amount of intake air necessary to create actual compression ratio 8.

Figure 8 (Full description is at [3] slide 2) shows Otto (similar to Pontiac) engine on the right and

AB engine on the left at a point where AB engine secondary valve is closed at V2

For each particular engine configuration a map will be created (or calculated in real time of the closing position of intake time variable valve above or below V2 (Fig. 8) versus RPM, and intake air temperature and pressure.

Every intake air flow compensation action will determine the closing position above or below V2 (Fig. 8) 

a.       Compensation of intake air flow resistance due to increased RPM

 

For each RPM value, engine computer will calculate the best adjustment VADJ for closing of AB valve at volume V2 + VADJ.  This can be explained with the Fig. 7 diagram showing how Pontiac engine is expected to perform after being modified into AB engine configuration.

 

Bellow is an explanation of the VE and power output curves of Fig 7:

 

·         First let us define the VE for AB engine cycle: it is the efficiency of reaching the optimal volume (or gas mass) of intake air at the initial (static) V2 position (Fig.8), at the atmospheric pressure. This volume, if compressed, will create VE close to 100%. This will result in maximum possible compression ratio for the particular fuel used for performance without detonation.

·         The VE curve before it picks will be almost the same for all types of engines in case of using a throttle to control engine power output. The more important parameter is the corresponding power output curve compared to unmodified engine after reaching maximum VE

·         As a starting point Fig. 7 point #1, it may be assumed that there is a 50% drop in AB engine(and Atkinson) power output of a cycle due to a ECR change from 8 to 16, due to half the air needed. In fact this is not true. Due to increased efficiency (~28% in our example, see Fig. 6) the single cycle power output (torque) will drop only about 35% - instead of 50% in this case.

·         For AB Engine, at increased RPM, the computer will close the AB engine secondary valve later according to calculated VADJ to maintain the actual compression ratio constant at a VE value of 100%. Consequently, this will also keep the torque almost constant, thus increasing AB engine power output almost linearly with RPM up to the point #3 (Fig. 7). At this point the Pontiac engine VE is only 0.5 that is a maximum for AB engine air volume at VE=100% (for this particular modification). After Point #3, the AB engine secondary valve will be always open and AB engine VE curve will be going down the same way as in a Pontiac (Otto) engine.

·         We can see that even though single engine cycle power output (torque) of AB engine is less than in unmodified Pontiac engine at the beginning, it becomes higher starting from Point #2 (Fig. 7) at about ~3700 RPM)  This happens because the torque in Pontiac  engine starts declining from ~ 2850 RPM, but torque of the AB engine continues to climb linearly until both engines power output become equal at ~3800 RPM 

This is a very important point that shows significant advantage of AB engine compared to Otto and Atkinson engines. At Point #2 the modified Pontiac engine will perform with the same power output as unmodified but with 28% higher efficiency than in the conventional Otto configuration!

·         Finally at point #4 the AB engine will reach its maximum power output at about ~5400 RPM.  The idea behind the increased maximum of the AB engine power output is rather simple. We expect AB engine maximum power output will increase by the same value as the engine efficiency. In this particular example it is about 28%.

 

At Point #4 the modified Pontiac engine will perform with 28% higher power output and fuel efficiency compared to the conventional configuration! Power output will be increasing up to 5400 RPM that is almost the maximum RPM for that particular engine. 

Conclusion: Implementation of AB engine cycle and air flow resistance compensation will not only improve the engine fuel efficiency significantly, but will also increase the engine performance (power output) starting from the moderate RPM, in our case ~3400 RPM.

b.      Compensation for change of intake air pressure and temperature.

It is known that the intake air temperature and pressure will change the required actual compression ratio to ensure engine operation without knocking (air-fuel mixture detonation).  AB engine configuration will allow this kind of compensation in a wide range of pressures and temperatures such as:

-       At high altitudes where pressure is low and temperature is low as well

-       In summer or winter seasons

-       In northern (Arctic) or southern (Antarctic) regions or very “hot” regions – deserts.

-       In Miller engines after turbocharger.

The advantage of using the compensation at decreased temperatures is only available in an AB engine configuration and is not possible in Otto or Atkinson configurations. Compensation will allow AB engine to produce higher power output in winter times or if engines are used in Arctic and Antarctic regions [did you not just said that already? Do not repeat]. In regions with very high temperature such as in Sahara desert, the compensation will prevent engine knocking.  Regardless of temperature and pressure, it will always adjust V2 position (Fig. 8) to keep engine performance and fuel efficiency at the optimum level.

c.       AB engine intake valve in multi-piston engines. 

AB engine’s secondary intake valve also has an advantage of providing the intake air flow compensation in multi-piston engines at low power output. Some of the pistons can be disengaged by closing the valve completely or partially, leaving fewer pistons working in certain conditions for optimal performance.

References:

1.      http://energyclimatetransportation.blogspot.com/2013/10/a-tale-of-two-cars.html

2.      http://abengine.com/fuel-efficiency.htm

3.      http://www.abengine.com/technology_presentation.htm

4.      http://www.team-integra.net/forum/blogs/michaeldelaney/2-header-exhaust-design-effects-engine-power.html

5.      http://www.wallaceracing.com/enginetheory.htm



AB Engine Technology and Technology Applications
 

This section describes several possible design realizations of the fuel efficient AB Engine depending on the  Internal Combustion Engine (ICE) application. We would like to emphasize that independent of which design solution is implemented, the AB Engine Method will create the most fuel efficient ICE engine theoretically possible! AB Engine is similar in fuel efficiency to the Atkinson engine, but does not have the disadvantages of implementing a complex mechanical solution. The AB Engine method also delivers many “collateral” advantages beyond the improvement in fuel efficiency such as low noise or silent engines, low temperature and pressure exhaust gases (eco friendly), linear power output with respect to RPM as well as adaptable solutions to different fuel types and intake gas conditions.  

Watch it on YouTube

The main idea protected by patent consist of two parts.

  1.   Ratio of maximum chamber volume to the minimum R=VMAX/VMIN is higher than critical  volume VC for particular fuel type. Definition of critical Volume is given in US patent first claims#8,086,386

    It is important to understand that R is not theoretically limited, it can be as high as desired from fuel efficiency point of view for one cycle at maximum power output. Practically, it is limited by the ratio at which the expanding burnt gas-fuel mixture reaches the environmental exhaust pressure PATM at volume VE. and temperature TE The ratio R can be even higher for engine designs that utilize different kinds of fuel.

  2.     Engine designs that utilize the second part of the method admit oxidizing gas to the combustion chamber with a gas mass that is less than equivalent to “Critical Volume - VC” at initial gas temperatureT1 and pressure PATM 
     

P-V Diagram (on the right) shows The "Alexander Bakharev (AB) engine P-V Cycle" of ICE at maximum power output. Diagram is outlining conventional engines (Otto, Diesel) cycles 1-2-4-5-6-2 and AB Engine Cycle 1-2-3-2-4-5-6-7-8-7

Green area 2-6-7 represent additional power generated by AB Cycle compare to conventional engine defining higher AB engine fuel efficiency

 

Some possible design solutions:

Solution 1.
 

Engine design with fixed high pressure Intake valve closing at a fixed level allowing gas intake below Critical volume. This solution is well described in the patent with step by step analysis of the Thermodynamics behind the method. (Picture bellow)

Applications: Excellent solution for stationary or mobile power generators such as:

  • Houses or offices

  • Boats, yachts and  large ships (marine applications)

  • Hybrid solutions for cars and trucks

Advantages:  

  • The most inexpensive implementation of the AB Engine Method and does not require the design of unique engine parts.

  • Excellent Design for an ICE in Power generators with fixed RPM and particular fuel type.

Disadvantages:

All the disadvantages of ICEs with fixed intake valves such as:

  • Declining power output with increase in RPM; this is not a disadvantage for Power Generators since they can be designed and optimized for a particular engine RPM.

  • Inability to adjust actual compression ratio to particular type of fuel or intake gas temperature and pressure.

     

    Solution 2.

    Engine design with Time Variable Valve (TVV)

    This is a solution that requires almost no changes to an existing engine that is already equipped with TVVs and PC controllers. There is a need however to reprogram the controller for specific parameters (variables) that are essential for executing the AB Engine Method. It is also necessary to implement sensors such that measure: temperature, pressure, RPM, fuel type, combustion chamber and piston positions. Many sensor solutions are already used in modern day technologies and they can be adapted to the AB Engine Method.

    Applications:

    This is an excellent solution for cars, motorcycles, trucks, airplanes and mobile Power generators ICEs. This variant is suited for extreme weather conditions and large altitude and atmospheric temperature/pressure changes. 
     

    Advantages:

    • Excellent for extreme weather conditions and large altitude and atmospheric temperature/pressure changes.

    • The TVV and PC controller make this solution adaptable to almost any type of application.

    • Great engine dynamics

    • Easy to adapt to any fuel type 
       

    • Engine can start up with gasoline and continue with Diesel

    • Easy to adapt to an existing TVV technology

    Disadvantages:

    • High temperature and High pressure control valve is expensive solution.

     

     

    Solution 3.

Engine design with an AB Engine Controlled Valve or Damper. This solution is well described in the section of "Technology Presentation" with step by step analysis of the P-V diagram behind the method.


 

This is one of the AB Engine team's favorite solutions. This technology is similar to TVVs, but has a different and unique implementation. This technology is described in detail in our ‘Technology Presentation” section, but there we did not disclose all the advantages of this variation. 

Applications:

This is an excellent solution for cars, motorcycles, trucks, airplanes and mobile Power generator ICEs. This variant is also suited for extreme weather conditions and large altitude and atmospheric temperature/pressure changes. THe solution is also adaptable to almost any type of application.

Advantages: 
 

  • This solution will provide the highest fuel efficiency theoretical possible for internal combustion engine

  • AB Engine Valve-Damper is applicable to single piston or multiple piston engines. One of the great advantages of this implementation is works with “normal” pressures and temperatures of intake gas which simplifies the valve control and allows for inexpensive solutions such as electromagnets for example.

  • It simplifies the valve-damper design because it combines two functions, it can be used as a valve that opens and closed at specific times and piston locations or work as a damper creating gas flow resistance at higher engine RPM.
     

  • Excellent for extreme weather conditions and large altitude and atmospheric temperature/pressure changes. The solution is also adaptable to almost any type of application.

  • Great engine dynamics

  • Easy to adapt to any fuel type

  • Engine can start up with gasoline and continue with Diesel

  • The best feature of the AB Engine Valve-Damper is that multi-piston engines would only need one valve at the manifold entrance. When acting as a damper it creates gas flow resistance and ensures optimal actual compression for any kind of fuel or intake gas condition. For many ICE applications it is possible to use Valve-Damper without PC controller adjusting fixed Damper position manually for particular fuel type or "summer-winter" intake gas conditions. I would separate it as a Solution 4. This solution is excellent, but not limited, for engines working with constant RPM. 

Disadvantages:

The AB Engine team does not see any significant disadvantages in using an AB Engine Valve-Damper. As this is a highly flexible solution, there is no need to implement it in more rigid ICE applications such as those described in solution one, that is, low power  house generators etc...



 

 

 

 

 

 

Disclaimer | Privacy Notice

© 2007 AB Engine Inc. All Rights Reserved