Vacuum force amplifier for internal combustion engine

Details Vacuum force amplifier for internal combustion engine Vacuum force amplifier for internal combustion engine

1978-04-18

1980-07-08

Lazarus, Ira S.

Internal-combustion engines

Charge forming device

Fuel injection system

417197, 417159, 261 41D, 188356, 60547R, 91 31, 123495, F02M 3900, B60T 1300

Patent

active

042112001

ABSTRACT:
The air intake of an internal-combustion engine passes through a throttle whose upstream and downstream sides are shunted by an idle-speed circuit. A vacuum-actuated auxiliary device has a vacuum line connected to the downstream side of the throttle. An injector-type jet pump connected in the idle circuit has an outlet connected to the downstream side of the throttle, a high-pressure inlet connected to the upstream side of the throttle, and a low-pressure input connected to the vacuum line. This jet pump serves as a vacuum amplifier during low-speed engine operation to ensure sufficient vacuum to drive the auxiliary load.

REFERENCES:
patent: 992144 (1911-05-01), Babcock
patent: 1374491 (1921-04-01), Coulombe
patent: 1753166 (1930-04-01), Bragg et al.
patent: 2075231 (1937-03-01), Schimanek
patent: 3503594 (1970-03-01), Goto
patent: 3520639 (1970-07-01), Hanes
patent: 3944634 (1976-03-01), Gerlach

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