Power plants – System having plural motors or having diverse types of... – Engine apparatus or system actuatable selectively or...
Patent
1997-09-05
2000-08-01
Koczo, Michael
Power plants
System having plural motors or having diverse types of...
Engine apparatus or system actuatable selectively or...
60 396, 123 22, F07B 7502, F02G 302
Patent
active
060949155
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a method and to devices for reducing the pollution of cyclic internal combustion engines with constant-volume independent combustion chambers.
BACKGROUND OF THE INVENTION
In his French patent applications with national registration numbers 9501518 and 9502212, the author has described a cyclic internal combustion engine method, the engine having a constant-volume independent combustion chamber, in which the compression chamber, the combustion chamber and the expansion chamber consist of three separate and entirely independent parts, thus allowing each of the three elements to be adapted to suit the function assigned to it without interfering with one another, as well as a system for controlling expansion (9502212) that makes it possible to make the maximum expansion pressure coincide with a crank angle that gives a high tangential force, further improving the overall efficiency of this type of engine.
However, when running in urban areas, especially with cars, the engine still consumes fuel which means that there are still polluting emissions even though these are very substantially reduced.
SUMMARY OF THE INVENTION
The method according to the invention makes it possible to eliminate entirely these emissions of polluting gases, especially in town driving when the engine requires little power.
It is characterized by the implementation means, and more particularly by the fact that during running at low power, the fuel injector is no longer operated and that in this case, any appropriate means are used to introduce into the combustion chamber substantially after the compressed air (without fuel) from the engine compressor has been let into this chamber--a small amount of additional air from an external reservoir in which air (or any other gas) is stored at very high pressure; this small amount of compressed air at ambient temperature will heat up when it comes into contact with the mass of hot air contained in the combustion chamber, will expand and will substantially increase the pressure that there is in the combustion chamber, so that as it expands it will be able to produce a power stroke sufficient to allow, for example, a vehicle to run in town driving mode. The amount of power produced will depend on the amount of additional air injected.
It is also characterized by the fact that the engine is equipped with a high-pressure compressor, which will be engaged during slowing down or during running at high power, in order to allow the external reservoir to be replenished with compressed air at very high pressure, thus making it possible to improve the range in eliminated-pollution running.
Thus the present invention relates to a method for eliminating the pollution of a cyclic internal combustion engine with a constant-volume independent combustion chamber, in which the compression chamber, the combustion chamber and the expansion chamber consist of three separate and entirely independent parts. This allows each of the three elements to be adapted to suit the function assigned to it without interfering with one another, where combustion takes place in an isolated constant-volume independent chamber which may also be equipped with a system for controlling the expansion making it possible to improve the efficiency of the engine. The method is characterized in that during running at low power, for example urban driving, for a vehicle thus equipped: constant-volume combustion chamber and the latter is therefore filled with compressed pure air at high temperature during each cycle; chamber--substantially after the compressed air from the engine compressor has been let in--a small amount of additional air (or any other gas) from an external reservoir in which air (or such other gas) is stored at a very high pressure, at ambient temperature, and allowed to expand to a pressure slightly higher than the pressure in the combustion chamber in order to allow it to be transferred thereto; with the hot compressed air already contained in the combustion chamber, will
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Negre Cyril
Negre Guy
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