Vehicle driveline protected system
AssigneeFca US LLC
InventorsMehmet Y Goceri, Matthew C Mervak, Godla Sagar Naidu
Life of this patent
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Abstract
A vehicle includes a torque generating system configured to generate torque through a driveline, a transmission, an accelerator position sensor configured to generate an accelerator pedal voltage signal indicative of a position of an accelerator pedal, and an electronic parking brake (EPB). A torque control system is programmed to determine the EPB is engaged, determine a gear of the transmission is in Drive or Reverse, and apply a predetermined limit to the accelerator pedal voltage signal to thereby apply a torque limit to the torque generating system to protect the driveline while the EPB is engaged.
Claims20
A vehicle comprising:
- a torque generating system configured to generate torque through a driveline;
- a transmission;
- a transfer case;
- an accelerator position sensor configured to generate an accelerator pedal voltage signal indicative of a position of an accelerator pedal;
- an electronic parking brake (EPB);
- and
- a torque control system programmed to:
- determine the EPB is engaged;
- determine a gear of the transmission is in Drive or Reverse;
- determine if the transfer case is in a four-wheel-drive low (4LO) gear;
- and
- apply a predetermined limit to the accelerator pedal voltage signal to thereby apply a torque limit to the torque generating system to protect the driveline while the EPB is engaged.
A vehicle comprising:
- a torque generating system configured to generate torque through a driveline;
- a transmission;
- an accelerator position sensor configured to generate an accelerator pedal voltage signal indicative of a position of an accelerator pedal;
- an electronic parking brake (EPB);
- and
- a torque control system programmed to:
- determine the EPB is engaged;
- determine a gear of the transmission is in Drive or Reverse;
- and
- apply a predetermined limit to the accelerator pedal voltage signal to thereby apply a torque limit to the torque generating system to protect the driveline while the EPB is engaged,
- wherein the accelerator position sensor comprises first and second accelerator position sensors each configured to generate a raw accelerator pedal voltage signal indicative of a position of the accelerator pedal, wherein the torque control system is further programmed to:
- rationalize the raw accelerator pedal voltage signals to determine a delta accelerator pedal voltage signal, which is converted into a driver torque request;
- and
- override the delta accelerator pedal voltage signal and apply the predetermined limit to the delta accelerator pedal voltage signal when the EPB is engaged and the transmission is in the Drive or Reverse gear.
A method of limiting torque in a vehicle having a torque generating system configured to generate torque through a driveline, the method comprising:
- monitoring, by a controller, an electronic parking brake (EPB) to determine if the EPB is engaged;
- monitoring, by the controller, a transmission to determine if a gear of the transmission is in Drive or Reverse;
- receiving, by the controller, an accelerator pedal voltage signal indicative of a position of an accelerator pedal of the vehicle;
- and
- applying, by the controller, a predetermined limit to the accelerator pedal voltage signal to thereby apply a torque limit to the torque generating system to protect the driveline while the EPB is engaged,
- wherein the accelerator position sensor comprises first and second accelerator position sensors each configured to generate a raw accelerator pedal voltage signal indicative of a position of the accelerator pedal, the method further comprising:
- rationalizing, by the controller, the raw accelerator pedal voltage signals to determine a delta accelerator pedal voltage signal, which is converted into a driver torque request;
- and
- overriding, by the controller, the delta accelerator pedal voltage signal and applying the predetermined limit to the delta accelerator pedal voltage signal when the EPB is engaged and the transmission is in the Drive or Reverse gear.
Dependencies are inferred from the claim text.