Internal-combustion engines – Particular piston and enclosing cylinder construction – Piston
Patent
1992-03-13
1993-11-30
Argenbright, Tony M.
Internal-combustion engines
Particular piston and enclosing cylinder construction
Piston
123 54R, 92 85R, 92182, F02F 300, F16J 102
Patent
active
052655652
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
The present invention relates to reciprocating engines such as gasoline engines or diesel engines.
BACKGROUND ART
In reciprocating engines, a technique for bringing rollers provided on a skirt portion of the piston into rolling contact with the inner surface of the side wall of the cylinder is proposed in order to decrease the sliding frictional resistance between the inner surface of the side wall of the cylinder and the side surface of the piston through piston rings and the like in the reciprocation of the piston.
According to the technique for involving such rollers, the weight of the piston increases and the inertia of the piston during reciprocation increases. As a result, the responsiveness of the engine is reduced. For example, driving performance such as acceleration performance is deteriorated, and hence driving becomes difficult.
In view of the above, it is an object of the present invention to provide an engine for decreasing the frictional resistance in the piston reciprocation by floating the lateral-pressure receiving side of the piston from the inner surface of the side wall of the cylinder by using a gas chamber which is provided between the side surface of the piston and the inner surface of the side wall of the cylinder without increasing the weight of the piston.
The other object of the present invention is to provide an engine with a simple structure and high durability by floating the lateral pressure receiving side of the piston from the inner surface of the side wall of the cylinder by using the gas pressure of a gas chamber into which the gas pressure is introduced from the combustion chamber, the gas chamber being formed between the inner surface of the side wall of the cylinder and the side surface of the piston opposite to the inner surface of the side wall of the cylinder.
DISCLOSURE OF THE INVENTION
According to the present invention, there is provided an engine comprising a piston, a top ring and a second ring which are fitted on the piston, a partition member fitted on the piston and connecting the top ring and the second ring for forming a gas chamber at the side surface of the piston, and a gas passage for communicating the gas chamber to an upper surface of the piston.
In one embodiment of the present invention, the gas passage is a gap between opposite ends of the top ring. In another embodiment, the gas passage is a through hole formed in the piston.
According to the present invention, there is provided an engine comprising a first and a second piston rings provided on a piston, and a gas passage formed at the position of the fisrt piston ring for adjusting a gas flow, the first piston ring being disposed adjacent to an upper surface of the piston that defines an engine combustion chamber, the gas passage communicating between the engine combustion chamber and an annular gas chamber defined between the side surface of the piston and the inner suface of the side wall of the cylinder opposite to the side surface of the piston as well as between the first piston ring and the second piston ring, the second piston ring being disposed adjacent to the first piston ring, the first and second piston rings being so provided on the piston that the distance between the first and second piston rings increases gradually from one of oscillating side surfaces of the piston to the other oscillating side surface opposite to the one oscillating side surface.
According to the present invention, there is provided an engine comprising a first and a second piston ring provided on a piston, and a gas passage formed at the position of the first piston ring for adjusing a gas flow, the first piston ring being disposed adjacent to an upper surface of the piston that defines an engine combustion chamber, the gas passage communicating between the engine combustion chamber and an annular gas chamber defined between the side surface of the piston and the inner surface of the side wall of the cylinder opposite to the side surface of the piston as well as between the first pisto
REFERENCES:
patent: 4455974 (1984-06-01), Shapiro et al.
patent: 4681326 (1987-07-01), Kubo
patent: 4719846 (1988-01-01), Langstroth
patent: 4721073 (1988-01-01), Naruoka
patent: 4846051 (1989-07-01), Wade et al.
patent: 4864975 (1989-09-01), Hasegawa
patent: 4945866 (1990-08-01), Chabot
patent: 5050485 (1991-09-01), Hoult
patent: 5054375 (1991-10-01), Kawabata et al.
Argenbright Tony M.
Bando Kiko Co., Ltd.
Macy M.
LandOfFree
Reciprocating engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reciprocating engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reciprocating engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2088388