US 11,230,989 B1Granted

System and method for disablement of diesel engine fuel injectors during cranking

AssigneeInternational Engine Intellectual Property Company, LLC

InventorMark Stephan Ehlers

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Abstract

A system and method for toolless disablement of diesel engine fuel injectors during engine cranking to facilitate diagnostics by depressing an engine throttle to a predetermined minimum depression level, say, at least 90% of an engine throttle distance to a floor of a diesel vehicle, depressing a brake, actuating a compression-ignition cycle actuator to a crank position, and holding the depressed brake, depressed engine throttle to its predetermined depression level for a predetermined minimum period, for instance at least 3 seconds, sending signals from an engine throttle position sensor and an ignition sensor to an engine control module, receiving signals from the engine throttle position sensor and ignition sensor by the engine control module, sending signals from the engine control module to the at least one fuel injector to disable the at least one fuel injector, controlling cranking of an engine with the engine control module, and allowing the engine to crank with at least one disabled fuel injector and without the engine starting.

Claims8

Dependent claims

A system for cranking a diesel engine of a vehicle without it starting, the diesel engine having one or more fuel injectors, the vehicle having:

an accelerator pedal that moves between a raised accelerator position when not actuated and a fully depressed actuator position when fully actuated;
an acceleration pedal position sensor which sends a signal indicative of the position of the accelerator pedal;
a brake pedal which moves between a raised brake pedal position when not actuated and a fully depressed brake pedal position when fully actuated;
a brake pedal position sensor which sends a signal indicative of the position of the brake pedal;
an actuator for turning over the engine which moves between a first actuator position when not actuated in which first position does not cause turning over of the engine, and a second actuator position when fully actuated which second position causes turning over of the engine;
an actuator sensor which sends a signal indicative of when the actuator is in its fully actuated position;
one or more fuel injectors for injecting fuel into the cylinders of the diesel engine;
and
a fuel injector controller for controlling actuation of the one or more fuel injectors;
the system comprising:
an electronic control module programmed to receive the electrical signals from the accelerator pedal position sensor, the brake pedal position sensor and the actuator sensor, and sending a signal to the fuel injection controller to disable all of the fuel injectors, while allowing the engine to turn over, upon the occurrence of the electronic control module receiving signals indicating that:
a) the accelerator pedal has been depressed to a predetermined accelerator pedal position between its raised position and fully depressed position or depressed greater;
and
b) the brake pedal has been depressed to a predetermined brake pedal position between its raised position and fully depressed position or depressed greater;
and
c) the actuator is retained in its second actuator position;
all three simultaneously for a predetermined period of time.

14 more elements

A method for cranking a diesel engine of a vehicle without it starting, the diesel engine having one or more fuel injectors, the vehicle having:

an accelerator pedal that moves between a raised accelerator position when not actuated and a fully depressed actuator position when fully actuated;
a brake pedal which moves between a raised brake pedal position when not actuated and a fully depressed brake pedal position when fully actuated;
an actuator for turning over the engine which moves between a first actuator position when not actuated in which first position does not cause turning over of the engine, and a second actuator position when fully actuated which second position causes turning over of the engine;
and
one or more fuel injectors for injecting fuel into the cylinders of the diesel engine;
and
the method, comprising:
providing an acceleration pedal position sensor which sends a signal indicative of the position of the accelerator pedal;
providing a brake pedal position sensor which sends a signal indicative of the position of the brake pedal;
providing an actuator sensor which sends a signal indicative of when the actuator is in its fully actuated position;
providing a fuel injector controller for controlling actuation of the one or more fuel injectors;
providing an electronic control module programmed to receive the electrical signals from the accelerator pedal position sensor, the brake pedal position sensor and the actuator sensor, and sending a signal to the fuel injection controller to disable all of the fuel injectors, while allowing the engine to turn over, upon the occurrence of the electronic control module receiving signals indicating that:
d) the accelerator pedal has been depressed to a predetermined accelerator pedal position between its raised position and fully depressed position or depressed greater;
and
e) the brake pedal has been depressed to a predetermined brake pedal position between its raised position and fully depressed position or depressed greater;
and
f) the actuator is retained in its second actuator position;
all three simultaneously for a predetermined period of time.

15 more elements

Dependencies are inferred from the claim text.