Fuel injection pump for a two-stroke engine

Details Fuel injection pump for a two-stroke engine Fuel injection pump for a two-stroke engine

1988-08-12

1989-07-11

Okonsky, David A.

Internal-combustion engines

Two-cycle

Rear compression

123496, 417395, F02M 3704, F02M 5920

Patent

active

048461199

ABSTRACT:
A pneumatically operated fuel injection pump has a work chamber which is partitioned by a membrane into a pulse chamber and a return chamber. The pulse chamber is charged with crankcase pressure from a two-stroke engine while a counterforce is built up in the return chamber which varies with rotational speed. A counterforce is developed by means of a precise pressure control in the return chamber which makes possible a highly precise injection adapted to rotational speed. For this purpose, the return chamber is connected with an adjusting volume via a throttled flow path. In addition, a leaf spring is mounted in the return chamber and is utilized as a return spring for the membrane.

REFERENCES:
patent: 3913551 (1975-10-01), Shaver
patent: 4300509 (1981-11-01), Schechter
patent: 4471278 (1984-09-01), Borst et al.
patent: 4551076 (1985-11-01), DuBois
patent: 4552101 (1985-11-01), Borst et al.
patent: 4627390 (1986-12-01), Antoine
patent: 4700668 (1987-10-01), Schierling et al.
patent: 4765802 (1973-10-01), Lettermann et al.

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