Internal-combustion engines – Burning by highly compressed air – Oil engine air preheated
Reexamination Certificate
2000-02-28
2001-06-26
McMahon, Marguerite (Department: 3747)
Internal-combustion engines
Burning by highly compressed air
Oil engine air preheated
C123S527000
Reexamination Certificate
active
06250261
ABSTRACT:
FIELD OF THE INVENTION
In general terms the present invention is related to a special device for feeding natural compressed gas to an engine with which is possible to replace the fuel originally used to feed this Diesel engine. Basically, this invention is addressed to replace diesel fuel since it has been scientifically demonstrated that exhaust gasses expelled from this kind of diesel engine pollute the air. At the same time it has also been scientifically demonstrated that natural compressed gas generates no contaminating particles during combustion.
BACKGROUND OF THE INVENTION
It seems to be redundant to enumerate the different advantages of using natural compressed gas for feeding automotive engines. As proof thereof there are different cities like Buenos Aires, Argentina in which there are thousands of cars which have changed the original fuel used for feeding the engine, making an important contribution worldwide. Problems related with the ozone hole created by contaminating gasses is a worldwide concern and each country should contribute to overcome this problem.
Contamination is not the only goal of the present development since it has been demonstrated that natural compressed gas involves several advantages for the engine, for example a better and cleaner operation of engine is achieved in comparison with the prior art Diesel engines. It is very important to take into account that the mere use of natural compressed gas as engine fuel does not automatically involve an improvement in the engine operation as well as a pollution decrease. On the contrary, an engine fed with natural compressed gas improperly may generate a greater amount of nitrogen oxide particles, which is one of the most toxic components of a vehicle exhaust gas together with carbon monoxide. Therefore a sole replacement of fuels does not automatically mean an improvement for the engine and the environment.
It has been scientifically demonstrated that an original diesel engine improperly fed with natural compressed gas may involve generating a greater quantity of contaminating particles than the original fuel.
There are several developments in the market for transforming from original diesel fuel to natural compressed gas. None of them feeds the engine properly. They basically consist of installing a carburator in the air inlet, spark plugs in the fuel injector's place and an electric distributor device replacing the original fuel pump. This kind of device does not take into account the above cited problem of air and gas weight therefore improper feeding of the engine involves creating pollution particles as was explained above.
Therefore, there is still market need to provide means capable of replacing the original polluting fuels by other alternative non-pollution fuels like natural gas electricity.
National, State and County authorities of different countries are becoming more and more aware of problems related with pollution and costs related with different diseases created by air pollution like lung cancer.
SUMMARY OF THE INVENTION
In order to solve the above-cited problems the present invention is a kit for transforming an original diesel engine so as to feed this engine with natural compressed gas. There are some cities in the world like the city of Mendoza in Argentina, in which the authorities have imposed a rule based on an analysis criteria called “from exhaust gas exit to outside” for decreasing the air pollution. This rule does not take into account the kind of engine, fuel, system, etc. used, the only important feature for this analysis is that the exhausting gasses generated by the engine can not include polluting particles. Thus, several engine manufactures have developed different diesel developments which exhaust gas analysis has demonstrated that they create lesser contaminating particles than several natural compressed gas engines. Said developments do not solve pollution problems due to their extremely high price, which is greater than a new conventional engine, therefore it seems to be inaccessible for a bus owner.
One of the main objects of the present invention is to transform used diesel engines by using a cheap, easy to install, low installation cost kit which creates no contaminating particles increasing the engine efficiency.
The present invention is referred to as a transformation kit for original diesel engines so that diesel fuel is replaced by natural compressed gas and the engine changes from diesel cycle to Otto cycle. Basically, the purposed invention is related with the way in which the fuel comes into the engine because some other modifications which also should be done in the engine seems to be obvious for any person skilled in the art. Any person skilled in the art may deduct that if an original diesel cycle engine should be transformed to an Otto cycle engine spark plugs should be included in the combustion chamber so as to generate sparks for starting the explosion. These spark plugs can only be lodged in a sole place: the place in which the original diesel engine lodged the diesel injector tips. At the same time an electric distribution device should also be included for electrically exciting the spark plugs in each cycle, therefore a conventional electrical distributor device is included in this kind of transformation and it is lodged in the place where the original diesel engine lodged the fuel bomb. All these changes seem to be obvious for any person skilled in the art and they will not be described in detail in the present specification.
There is still a market need for a transformation engine kit capable of properly feeding a gas to a diesel engine. Natural gas is so much lighter than the air, and in order to avoid contaminating particles in the exhaust gas a gas-air ratio of 14-1 should be achieved. The present invention comprises a transformation kit for feeding the engine cylinders in a complete and even way and at the same time running an important increase in the engine power. An optimal use of fuel and a complete combustion of fuel are achieved in the combustion chamber.
Even when there are several diesel engine transformation kits in the market for adapting this fuel to the existing diesel engines, none of them has achieved a proper function of engine operation, no increase in the engine output is achieved like in the present case, excessive amount of oil is consumed and they usually have a short useful life since they usually work at high temperatures affecting the life time of the engine structure.
The transformation kit of the present invention achieves, due to the new improved feeding characteristics, a low temperature at the combustion chamber of each cylinder lower than the temperature usually found in other gas engines. This is a clear demonstration of the optimal use of fuel in each cycle using the purposed kit.
Summing up, the present invention is referred to a diesel engine conversion kit for feeding with natural compressed gas a diesel engine wherein said kit comprises feeding means arranged at the air inlet of the diesel engine to be transformed, such feeding means comprises a base plate including two feeding inlets, each including flux regulation means. A gas feeding means is also include in said plate comprising a body with two passages which arrangement coincides with the arrangement of the above cited inlet of set plate: Inside said passages pressing gas injector tubes are lodged including long gas exit grooves. Finally upward of said feeding means an air inlet means is provided defining a unique air passage and including a central narrowed portion.
Using the above describe means an easy regulation of fuel inlet inside the engine is achieved. It is very important to point out that the purposed kit may be adapted to transform different kind of diesel engines without changing the kit design. It may be easily adapted to different types of diesel engines without any need of manufacturing different kinds of pieces, optimizing the kit costs and achieving an excellent behavior of the engine.
REFERENCES:
patent: 4019483 (1977-04-01),
McMahon Marguerite
Sterne Kessler Goldstein & Fox PLLC
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