Internal combustion engine with induction fuel system having an

Details Internal combustion engine with induction fuel system having an Internal combustion engine with induction fuel system having an

1993-06-22

1994-10-25

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Gaseous fuel and air mixer

123198DB, F02M 2104

Patent

active

053579356

ABSTRACT:
An engine shut-down circuit for a gaseous fuel induction system comprises a solenoid operated three-way valve connected to the electrical system such that when a shut-down condition is sensed, a vacuum signal from the intake manifold is sent to a pressure regulator, causing its internal fuel port to automatically close despite the presence of a residual negative pressure fuel supply signal which would otherwise keep the regulator open, thereby shutting off fuel supply instantaneously, despite continued rotation of the engine, thereby preventing fuel from being inducted into the engine which, if present upon restarting, would likely cause pre-ignition or backfire.

REFERENCES:
patent: 4369751 (1983-01-01), Batchelor et al.
patent: 4483302 (1984-11-01), Mannessen
patent: 4811720 (1989-03-01), Katumata et al.
patent: 4841941 (1989-06-01), Parietti
patent: 4989573 (1991-02-01), Yokoyoma et al.
patent: 5136986 (1992-08-01), Jensen
patent: 5146903 (1992-09-01), Baverstock
Experimental LP shut-off system installed on X-series Clark lift trucks operated under the control and supervision of Clark Engineering laboratory in Lexington, Ky. on or about Apr. 7, 1992 as an after market retrofit coordinated with the Dealer, Portman Equipment of Cincinnati, Ohio, which supervised the installation through its customer service department in monitoring the performance of the lift truck which had been exposed to over 5,000 hours of operation before the retrofit, the fuel system of the lift truck retrofitted being depicted on page 22 of the Clark Parts Manual, GX230-OQ1-7158 of May 1989 for an LPG truck.

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