Fuel system for a mixture-compressing, spark ignited four cycle

Details Fuel system for a mixture-compressing, spark ignited four cycle Fuel system for a mixture-compressing, spark ignited four cycle

1978-10-24

1981-03-31

Myhre, Charles J.

Internal-combustion engines

Precombustion and main combustion chambers in series

Having combustible mixture forming means

123511, 123514, F22B 2130

Patent

active

042586810

ABSTRACT:
A fuel system for a mixture-compressing, spark-ignited four cycle internal combustion engine with charge stratification of the type wherein a major portion of the charge is introduced into a main combustion chamber as a lean fuel-air mixture by a main mixture forming system such as a carburetor and wherein the remainder of the charge is introduced into an auxiliary combustion chamber joined to the main combustion chamber via a firing channel by an auxiliary combustion chamber injection pump and injection nozzle is improved by the provision of only a single fuel feed pump which is connected to the fuel tank and supplies fuel from the tank directly to the injection pump at a first pressure and supplies fuel to the main mixture forming system via a pressure reducing valve at a second pressure that is lower than the first pressure. According to a preferred embodiment, the single fuel feed pump supplies fuel to the injection pump at a pressure of 1 bar and the pressure-reducing valve is a pilot valve that reduces the pressure of fuel supplied to it to 0.2 bar.

REFERENCES:
patent: 2534346 (1950-12-01), Fenney
patent: 3039485 (1962-06-01), Brohl
patent: 3682146 (1972-08-01), Mozokhim et al.
patent: 3805823 (1974-04-01), Kakegawa
patent: 3824965 (1974-07-01), Clawson
patent: 3990413 (1976-11-01), Pischinger
patent: 4044746 (1977-08-01), Kaye
patent: 4119066 (1978-10-01), Happel

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