System for controlling fuel flow within an internal combustion engine
First Claim
1. A system for controlling fuel flow within an internal combustion engine having a plurality of cylinders, said system comprising a fuel source;
- a fuel pump responsive to the speed of the engine and having an inlet connected to said fuel source, a first outlet connected to a first fuel supply line for a predetermined number of first cylinders, and a second outlet; and
a multi-mode adjustable control valve having a housing provided with a first port connected to a drain communicating with the fuel source, a second port connected to the second outlet of said fuel pump, a third port connected to the first fuel supply line, and a fourth port connected to a second fuel supply line for a predetermined number of second cylinders;
said control valve, when the engine is operating below a predetermined first speed and/or below a predetermined operating temperature, automatically assuming a first mode wherein fuel flow to the second cylinders is substantially cut off except for a predetermined restrictive amount of fuel flow thereto under a predetermined low pressure to effect continuous lubrication of said second cylinders, and when the engine is operating above said predetermined operating temperature, the control valve automatically assumes a second mode wherein there is substantially unrestricted fuel flow to the second cylinders.
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Accused Products
Abstract
A system is provided for controlling fuel flow within an internal combustion engine having a plurality of cylinders. The system includes a fuel source; a fuel pump responsive to the engine speed; and a multimode adjustable control valve connected to the fuel pump and a predetermined number of first cylinders. The control valve, when in a first mode, substantially shutting off fuel flow to the first cylinders, except for a minimal amount of fuel leakage from the valve to the first cylinders for lubricating purposes. When in a second mode, the control valve allows substantial fuel flow to the first cylinders. The control valve assumes its first mode when the operating temperature is below a predetermined amount and/or the engine is operating under a predetermined load.
24 Citations
11 Claims
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1. A system for controlling fuel flow within an internal combustion engine having a plurality of cylinders, said system comprising a fuel source;
- a fuel pump responsive to the speed of the engine and having an inlet connected to said fuel source, a first outlet connected to a first fuel supply line for a predetermined number of first cylinders, and a second outlet; and
a multi-mode adjustable control valve having a housing provided with a first port connected to a drain communicating with the fuel source, a second port connected to the second outlet of said fuel pump, a third port connected to the first fuel supply line, and a fourth port connected to a second fuel supply line for a predetermined number of second cylinders;
said control valve, when the engine is operating below a predetermined first speed and/or below a predetermined operating temperature, automatically assuming a first mode wherein fuel flow to the second cylinders is substantially cut off except for a predetermined restrictive amount of fuel flow thereto under a predetermined low pressure to effect continuous lubrication of said second cylinders, and when the engine is operating above said predetermined operating temperature, the control valve automatically assumes a second mode wherein there is substantially unrestricted fuel flow to the second cylinders. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a fuel pump responsive to the speed of the engine and having an inlet connected to said fuel source, a first outlet connected to a first fuel supply line for a predetermined number of first cylinders, and a second outlet; and
Specification