Shift system for a vehicle
AssigneeGM Global Technology Operations LLC
InventorDevon Robert Hall
Life of this patent
Estimating the term…
Abstract
A shift system includes a shifter including a first switch, a second switch, and an interlock switch and being operable between a plurality of gear states. A controller is communicatively coupled with the shifter to receive signals that correspond to each of the first switch, the second switch, and the interlock switch. The controller includes a diagnostic counter that includes a passing criteria and a predetermined diagnostic threshold and is configured to adjust the diagnostic counter based on at least one of the signals received from the shifter being inconsistent with the others of the signals received.
Claims20
A vehicle shift system, comprising:
- a first gear switch operable between a plurality of gear states;
- a second gear switch operable between the plurality of gear states;
- an interlock switch operable between an open state and a closed state, the closed state corresponding to one of the plurality of gear states;
- and
- a controller communicatively coupled to each of the first gear switch, the second gear switch, and the interlock switch, the controller including a diagnostic counter and configured to register a diagnostic on the diagnostic counter when a signal from at least one of the first gear switch, the second gear switch, and the interlock switch is different from the other of the first gear switch, the second gear switch, and the interlock switch.
A shift system, comprising:
- a shifter including a first switch, a second switch, and an interlock switch and being operable between a plurality of gear states;
- and
- a controller communicatively coupled with the shifter to receive signals corresponding to each of the first switch, the second switch, and the interlock switch, the controller including a diagnostic counter that includes a passing criteria and a predetermined diagnostic threshold and being configured to adjust the diagnostic counter based on at least one of the signals received from the shifter being inconsistent with the others of the signals received.
A shift system for a vehicle, comprising:
- a gear switch including a first switch and a second switch each operable between at least one of a reverse state, a neutral state, and a drive state;
- an interlock switch communicatively coupled to the gear switch and operable between an open state and a closed state, the closed state selectively corresponding to one of the reverse state, the neutral state, and the drive state;
- and
- a controller communicatively coupled to the gear switch and the interlock switch and configured to receive signals from the interlock switch and the gear switch, the controller storing a diagnostic counter configured to track a difference between the signal received from the interlock switch and the signal received from the gear switch, the diagnostic counter including a predetermined diagnostic threshold for each of the gear switch and the interlock switch, respectively.
Dependencies are inferred from the claim text.