Fluid handling – Processes
Patent
1985-02-15
1986-05-13
Rosenthal, Arnold
Fluid handling
Processes
123490, 123438, 25112905, 25112908, F16K 3106, F02M 5100
Patent
active
045879869
ABSTRACT:
A motor vehicle fuel system operable selectively to supply metered quantities of petrol or LPG in its gaseous state to a carburetter induction passage. The LPG system includes a single stage pressure regulator and an injection valve which may be a digital or an analogue valve. The regulator operates to vary the pressure of gaseous LPG with variations in engine loading by referring that pressure across a single diaphragm to the pressure established in the induction passage downstream of the throttle valve by operation of the engine, while maintaining that regulated gas pressure above that subsisting in the induction passage upstream of the throttle valve. An electronic control system, which may be an analogue control system or a digital control system incorporating a microprocessor having a data store matrix, responds to certain engine operating conditions and controls operation of the injection valve whereby the latter injects metered quantities of gaseous LPG for presentation to the induction passage upstream of the throttle valve in accordance with the requirements of the engine. If a digital injection valve is used, provision is preferably made for smoothing the pulsed output of that valve before it is presented to the induction passage.
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Clarke Peter J.
Marriage David J.
Pagdin Brian C.
Shadbolt Colin F.
Sheppard Ian J.
Rosenthal Arnold
Solex (U.K.) Limited
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