Clutch pedal position sensor diagnostic
AssigneeFca US LLC
InventorsScott E Henson, Craig A Alcock, Dhaval D Shah
Life of this patent
Estimating the term…
Abstract
A system and method of diagnosing a clutch pedal position sensor of a vehicle includes determining if a speed of the vehicle speed is less than a first predetermined speed, recording a maximum clutch pedal voltage, determining if a vehicle launch event is in progress, recording a minimum clutch pedal voltage, determining a voltage difference between the maximum clutch pedal voltage and the minimum clutch pedal voltage, and declaring a clutch pedal position sensor fault based on a comparison between the voltage difference and a threshold voltage.
Claims15
A method of diagnosing a clutch pedal position sensor of a vehicle, the method comprising:
- receiving, at a controller, voltage signals from the clutch pedal position sensor;
- determining, at the controller, if a speed of the vehicle is less than a first predetermined speed indicative of the vehicle being at rest or substantially at rest;
- monitoring, at the controller, the clutch pedal voltage signals, and if the vehicle speed is less than or equal to the first predetermined speed, recording a maximum clutch pedal voltage indicative of at least substantially full depression of a clutch pedal of the vehicle;
- determining if a vehicle launch event is in progress;
- recording a minimum clutch pedal voltage if the vehicle launch event is in progress, the minimum clutch pedal voltage indicative of at least substantial release of the clutch pedal;
- determining if a speed of the vehicle is greater than a second predetermined maximum speed greater than the first predetermined speed indicating the launch event is complete;
- determining a voltage difference between the maximum clutch pedal voltage and the minimum clutch pedal voltage if the vehicle speed is greater than the second predetermined maximum speed;
- and
- declaring a clutch pedal position sensor fault based on a comparison between the voltage difference and a predetermined threshold voltage.
A vehicle comprising:
- a clutch pedal;
- a clutch pedal position sensor;
- and
- a controller having a clutch pedal position sensor diagnostic configured to:
- determine if a speed of the vehicle is less than a first predetermined speed indicative of the vehicle being at rest or substantially at rest;
- monitor, at the controller, voltage signals from the clutch pedal position sensor, and if the vehicle speed is less than or equal to the first predetermined speed, record a maximum clutch pedal voltage indicative of at least substantially full depression of the clutch pedal;
- determine if a vehicle launch event is in progress;
- record a minimum clutch pedal voltage if the vehicle launch event is in progress, the minimum clutch pedal voltage indicative of at least substantial release of the clutch pedal;
- determine if a speed of the vehicle is greater than a second predetermined maximum speed greater than the first predetermined indicating the launch event is complete;
- determine a voltage difference between the maximum clutch pedal voltage and the minimum clutch pedal voltage if the vehicle speed is greater than the second predetermined maximum speed;
- and
- declare a clutch pedal position sensor fault based on a comparison between the voltage difference and a predetermined threshold voltage.
Dependencies are inferred from the claim text.