Torch ignition internal combustion engine

Details Torch ignition internal combustion engine Torch ignition internal combustion engine

1976-07-01

1978-04-25

Lazarus, Ronald H.

Internal-combustion engines

Two-cycle

Rear compression

123191SP, 123 32ST, F02B 2300

Patent

active

040857131

ABSTRACT:
A torch ignition internal combustion engine has a main combustion chamber for the combustion of a lean air-fuel mixture and an auxiliary combustion chamber for the combustion of a rich air-fuel mixture. The auxiliary combustion chamber has a suction and a discharge apertures open to the main combustion chamber. The suction aperture is located near to a valve seat for an intake valve so that the auxiliary combustion chamber is communicated with an intake port through the suction aperture and a part of the main combustion chamber when the intake valve is opened. The intake port is connected at its upstream end to an air intake pipe. A fuel injection nozzle extends into the intake port and is positioned such that a straight line between a fuel discharge orifice of the nozzle and a point of the valve seat nearest to the suction aperture is included in the jet of fuel discharged from the nozzle, so that a substantial part of the fuel injection from the nozzle during an intake stroke is directed toward the suction aperture of the auxiliary combustion chamber to thereby facilitate introduction of the rich air-fuel mixture thereinto. The fuel is discharged from the nozzle continuously throughout all of the strokes of each cycle of engine operation, so that the fuel discharged during the strokes except the intake stroke is retained and properly vaporized within the intake port and mixed with air to produce an air-fuel mixture which is introduced into the main combustion chamber together with fresh air from the air intake pipe forming a lean air-fuel mixture when the intake valve is opened, whereby an improved stratified charge is provided.

REFERENCES:
patent: 3974818 (1976-08-01), Noguchi et al.
patent: 3982504 (1976-09-01), Noguchi et al.

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