Engine combustion chamber construction

Details Engine combustion chamber construction Engine combustion chamber construction

1986-12-01

1987-11-17

Cross, E. Rollins

Internal-combustion engines

Means to whirl fluid before, upon, or after entry into...

123661, 123664, F02B 3100, F02B 2300

Patent

active

047066229

ABSTRACT:
A mixture-compressing spark-ignited four-stroke internal combustion engine having a combustion chamber bounded by the piston and the cylinder head, and inlet and exhaust valves, the valve openings of which are offset in plan view in the longitudinal direction of the engine with respect to a transverse plane of the cylinder and the valve stems of which form an acute angle when projected onto the transverse plane of the cylinder, and a squish area opposite a spark plug and parts of the inlet valve opening being masked and supplied with a mixture by a swirl inlet passage, the swirl inlet passage supplying a mixture to the inlet valve opening tangentially, a spark plug being disposed close to the center of the cylinder on the side facing the inlet valve opening, a squish area being provided opposite the spark plug amounting to between 5% and 15% of the cylinder cross-sectional area, and the inlet valve opening being masked on its flow downstream area toward the outer periphery of the cylinder by a downward projection from the top of the combustion chamber through an angle of between 70.degree. and 180.degree. at a height of between 70% and 100% of the valve stroke over a gap width of between 1 and 1.5 mm.

REFERENCES:
patent: 3318292 (1967-05-01), Hideg
patent: 4201175 (1980-05-01), Tanaka et al.
patent: 4421080 (1983-12-01), Kogure
patent: 4658792 (1987-04-01), Yamashita et al.

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