F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
123/15
F02B 43/00 (2006.01) F02N 19/00 (2010.01)
Patent
CA 1206825
ABSTRACT OF THE DISCLOSURE The priming system for an internal combustion engine adapted to operate on a gaseous fuel includes a normally closed, solenoid-operated priming valve electrically connected to the engine ignition circuit through a selector switch and the normally closed contacts of a vacuum switch when the selector switch is an "automatic" position. The priming valve controls a small flow of the gaseous fuel into the air intake of the engine carburetor. The vacuum switch has a pressure-sensing chamber which is connected in fluid communication with the engine intake manifold. When an operator moves the engine ignition switch to a start position with the selector in the "automatic" position, the priming valve is energized open to admit a small flow of the gaseous fuel into the carburetor air intake for priming. When the pressure in the engine intake manifold decreases below a predetermined level during engine cranking the vacuum switch opens to deenergize the priming valve which closes to terminate the flow of priming fuel. If over priming occurs, the operator can move the selector switch of an "off" position which electrically disconnects the priming valve from the ignition circuit and causes the priming valve to close. In a preferred embodiment, the selector switch is also movable to a "manual" position wherein the priming valve is momentarily electrically connected to an electrical power source.
425991
Outboard Marine Corporation
Smart & Biggar
LandOfFree
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