Method and apparatus for electronic throttle monitoring
First Claim
1. An electronic throttle monitor for a motor vehicle powertrain system with an electronic throttle control and a powertrain control module (PCM) including a main processor comprising:
- a processor independent of the main processor, said independent processor ordered to perform a monitoring function in a first operating mode including reading a set of powertrain sensors and communication interfaces shared with the PCM and determining when detected power is greater than demanded power;
said processor being programmed to perform a limiting function in a second operating mode for limiting detected power to less than demanded power when detected power is greater than demanded power.
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Accused Products
Abstract
A method and apparatus for executing a strategy of electronic throttle monitoring of a powertrain system including an electronic powertrain control module, and an electronic throttle control, includes an independent processor receiving signals shared with the powertrain control module from sensors and actuators on the vehicle. The monitor operates in a monitoring mode to detect faults occurring in the powertrain or the powertrain control module, and determines whether mitigating conditions occur in conjunction with detected power output greater than power demand. In the event that these mitigating conditions are not detected, the monitor operates in a limiting mode to actuate decreases in power output below the level of power demand.
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Citations
27 Claims
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1. An electronic throttle monitor for a motor vehicle powertrain system with an electronic throttle control and a powertrain control module (PCM) including a main processor comprising:
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a processor independent of the main processor, said independent processor ordered to perform a monitoring function in a first operating mode including reading a set of powertrain sensors and communication interfaces shared with the PCM and determining when detected power is greater than demanded power; said processor being programmed to perform a limiting function in a second operating mode for limiting detected power to less than demanded power when detected power is greater than demanded power. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electronic throttle control for a motor vehicle powertrain comprising:
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a powertrain control module, sensors, actuators, and an electronic throttle control; an interface including inputs from said sensors shared with the powertrain control module; an electronic throttle monitor including an independent processor including a first operating mode determining whether engine power exceeds power demand and a second operating mode enabling one of a plurality of decreasing power output signals. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for monitoring a motor vehicle powertrain having a powertrain control module with a processor for controlling actuators and responding to sensors for engine throttle control comprising:
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monitoring by independently processing inputs shared with the powertrain control module for detecting a power level greater than power demand, and decreasing the power level when detected power level is greater than power demand and a fault in said powertrain control module fails to control said actuators. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification