Actuating fluid control system
AssigneeInternational Engine Intellectual Property Company, LLC
InventorSidi Ould Sadfa
Life of this patent
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Abstract
A control system for controlling the flow of an actuating fluid to an accumulator, the accumulator serving the fuel injectors of an internal combustion engine, includes a controller being in communication with a plurality of engine related sensors. A variable output pump is in fluid communication with a source of actuating fluid and has at least two selectable output conditions, the pump being operably coupled to the controller, the controller acting to selectively port a portion of the actuating fluid to the accumulator in a first pump output condition and to vent the portion of the actuating fluid to a reservoir in a second pump output condition resulting in power saving. A fuel injection system and a method of control are also included.
Claims43
A control system for controlling the flow of an actuating fluid to an accumulator, the accumulator serving the fuel injectors of an internal combustion engine, comprising:
- a controller being in communication with a plurality of engine related sensors;
- a multi-stage pump being in fluid communication with a source of actuating fluid;
- a valve being in selective fluid communication with the accumulator, with a low pressure reservoir, and with at least one stage of the multi-stage pump, the valve further being in communication with the controller, the controller acting to shift the valve to selectively port actuating fluid to the accumulator and to vent actuating fluid to the reservoir, the valve being a proportional flow control valve in fluid communication with the multi-stage pump and with the low pressure reservoir for smoothly controlling pressure during transition between porting actuating fluid to the accumulator and venting actuating fluid to the reservoir.
A control system for controlling the flow of an actuating fluid to an accumulator, the accumulator serving the fuel injectors of an internal combustion engine, comprising:
- a controller being in communication with a plurality of engine related sensors;
- a variable output pump being in fluid communication with a source of actuating fluid and having at least two selectable output conditions, the pump being operably coupled to the controller, the controller acting to selectively port a portion of the actuating fluid to the accumulator in a first pump output condition and to vent the portion of the actuating fluid to a reservoir in a second pump output condition, the valve being proportional flow control valve in fluid communication with the multi-stage pump and with the low pressure reservoir for smoothly controlling pressure during transition between porting actuating fluid to the accumulator and venting actuating fluid to the reservoir.
A fuel injection system of an internal combustion engine having a plurality of fuel injectors, an actuating fluid under pressure in an accumulator, the accumulator serving the fuel injectors with actuating fluid for intensification of fuel to be injected, comprising:
- a controller being in communication with a plurality of engine related sensors;
- a variable output pump being in fluid communication with a source of actuating fluid and having at least two selectable output conditions, the pump being operably coupled to the controller, the controller acting to selectively port a portion of the actuating fluid to the accumulator in a first pump output condition and to vent the portion of the actuating fluid to a reservoir in a second pump output condition;
- and
- a proportional flow control valve in fluid communication with the variable output pump and with the low pressure reservoir for smoothly controlling pressure during transition between porting actuating fluid to the accumulator and venting actuating fluid to the reservoir.
A control method for controlling the flow of an actuating fluid to an accumulator, the accumulator serving the fuel injectors of an internal combustion engine, comprising:
- sensing a plurality of engine related parameters;
- pumping actuating fluid from a source of actuating fluid;
- selectively porting a portion of the actuating fluid to the accumulator in a first output condition and venting the portion of the actuating fluid to a reservoir in a second output condition;
- and
- smoothly controlling pressure during transition between porting actuating fluid to the accumulator and venting actuating fluid to the reservoir by means of a proportional flow control valve.
Dependencies are inferred from the claim text.