Internal-combustion engines – Particular piston and enclosing cylinder construction – Piston
Patent
1996-02-26
1997-09-09
Solis, Erick R.
Internal-combustion engines
Particular piston and enclosing cylinder construction
Piston
123 27GE, 123526, F02F 300
Patent
active
056645350
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a gas combustion engine comprising a gas exhaust system, an air intake system, an engine block comprising a number of cylinders and pistons, which pistons can be translated in the cylinders, and a cylinder head which delimits the space in the cylinders at one extremity, whereby the volume of the space in a cylinder between the cylinder head and a piston can be varied between a minimal and a maximal value by means of the translatory motion of the piston, and the ratio of the said minimal and maximal values defines a compression ratio, and a combustion space is defined by the space in that state of the piston which corresponds to a minimal volume. The invention also relates to a method of manufacturing such a gas combustion engine.
2. Description of the Related Art
Trucks and buses in Europe are fitted standard with diesel engines, for economic reasons (power, lifetime, fuel consumption). An alternative for diesel engines is formed by gas combustion engines running on LPG or natural gas. Disadvantages of gas combustion engines, however, are that they have a lower power and a higher fuel consumption than diesel engines. In addition, gas combustion engines are more expensive than diesel engines. This is caused inner alia by the fact that gas combustion engines are not yet manufactured by mass production techniques, and by the fact that the trucks and buses are delivered standard from the factory with diesel engines, so that modification is required if such a vehicle is to be made suitable for incorporation of a gas combustion engine.
An increasingly important disadvantage of diesel engines, however, concerns their pollution of the environment with exhaust gases. Such pollution is very much greater in the case of diesel engines than in the case of gas combustion engines. Gas combustion engines are generally known to be relatively clean engines, which pollute the environment to only a slight extent with exhaust gases which are much cleaner than those produced by diesel engines. This disadvantage of diesel engines is of even greater significance in the case of transport in densely populated areas, particularly in cities. In such areas, the disadvantages of the said pollution are felt to a greater extent than outside cities.
In order to alleviate the problem with respect to pollution, ever-increasing numbers of vehicles for intended use in city traffic are being fitted with gas combustion engines. Such vehicles are predominantly new ones, which are used to replace older, written-off vehicles, and are provided with new gas combustion engines during production; alternatively, the new gas combustion engine in such vehicles is provided during a revision service, and is a complete replacement for a former written-off diesel engine in the vehicle. In both instances, special modifications to the vehicles are necessary before the gas combustion engines can be fitted.
However, since the economic lifetime of diesel engines is long, which, for financial reasons, tends to be a dissuading factor in possible early replacement of the diesel engines, a large percentage of all such vehicles will remain fitted with diesel engines in the coming years, even if all new vehicles and revised vehicles were to be fitted with gas combustion engines.
An object of the invention is the provision of a financially attractive solution to the problem of pollution hereabove elucidated. To this end, the gas combustion engine in accordance with the invention is characterised in that the gas combustion engine is a converted diesel engine, whereby the combustion space and the compression ratio are adapted to application of gas as a fuel, whereby the pistons have a cylindrical wall and a top surface, whereby a hollow is located in the top surface, which hollow forms part of the combustion space and has an approximately circle-cylindrical form and an approximately flat bottom and the hollow has a diameter and a depth, whereby the ratio of the diameter to the depth lies betwe
REFERENCES:
patent: 3077189 (1963-02-01), Earnshaw et al.
patent: 3703886 (1972-11-01), Witzky
patent: 4306532 (1981-12-01), Camacho
patent: 4843558 (1989-06-01), Bergmann et al.
patent: 5070850 (1991-12-01), Davis et al.
patent: 5315981 (1994-05-01), Chen
patent: 5327813 (1994-07-01), De Bell et al.
patent: 5408957 (1995-04-01), Crowley
patent: 5487362 (1996-01-01), Weller et al.
patent: 5531199 (1996-07-01), Bryant et al.
SAE Abstract of document No. 880149, Feb. 1988.
SAE Abstract of document No. 950469, Feb. 1995.
by Grohe, Heinz, "Vorwort", Otto- und Dieselmotoren, pp. 5, 150 and 151. 1973.
P. Van Tilburg-Bastianen Revisie B.V.
Solis Erick R.
LandOfFree
Gas combustion engine, and method of manufacturing the gas combu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gas combustion engine, and method of manufacturing the gas combu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas combustion engine, and method of manufacturing the gas combu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-63751