Rocking enabled shift-by-wire system
AssigneeGM Global Technology Operations LLC
InventorStephen Lewis Pudvay
Life of this patent
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Abstract
A shift-by-wire system includes an incremental shift interface that generates an incremental shift signal. A rock control module enables a rocking mode and generates a rock control signal based on status of a vehicle parameter. The rocking mode includes shifting between a first mode and a second mode and back to the first mode. The first mode is one of a reverse mode and a drive mode and the second mode is the other one of the reverse mode and the drive mode. A shift interface module generates a shift control signal to shift a transmission of a vehicle between the first mode and the second mode based on the incremental shift signal and the rock control signal.
Claims20
A shift-by-wire system comprising:
- a rock control module that enables a rocking mode based on status of a vehicle parameter and generates a rock control signal, wherein the rocking mode includes shifting from a first mode to a second mode and then back from the second mode to the first mode,
- wherein the first mode is one of a reverse mode and a drive mode and the second mode is the other one of the reverse mode and the drive mode;
- and
- a shift interface module that, in response to the rock control signal, generates a shift control signal to sequentially shift a transmission of a vehicle from the first mode to the second mode and then from the second mode back to the first mode.
A method of operating a shift-by-wire system comprising:
- generating a paddle shift signal via a paddle shifter;
- activating a rocking mode based on status of a vehicle parameter and state of a mode selector interface;
- generating a rock control signal,
- wherein the rocking mode includes shifting from a first mode to a second mode and then back from the second mode to the first mode, and
- wherein the first mode is one of a reverse mode and a drive mode and the second mode is the other one of the reverse mode and the drive mode;
- generating a shift control signal to shift a transmission of a vehicle between the first mode and the second mode based on the paddle shift signal and the rock control signal;
- and
- generating at least one of a traction control signal and an automatic parking signal,
- wherein the rocking mode is enabled and the rock control signal is generated based on the traction control signal or the automatic parking signal.
A shift-by-wire system comprising:
- an interface comprising a plurality of switches, wherein the plurality of switches are configured to switch between transmission driving modes, and wherein the plurality of switches include a first switch and a second switch;
- a rock control module that enables a rocking mode based on a vehicle speed and generates a rock control signal, wherein the rocking mode includes shifting from a first mode to a second mode and then back from the second mode to the first mode,
- wherein the first mode is one of a reverse mode and a drive mode and the second mode is the other one of the reverse mode and the drive mode;
- and
- a shift interface module that, based on the rock control signal, generates a shift control signal to shift a transmission of a vehicle from the first mode to the second mode and then back from the second mode to the first mode,
- wherein the rock control module enables the rocking mode if
- the vehicle speed is less than or equal to a predetermined threshold, and
- the first switch is switched while the second switch is switched.
Dependencies are inferred from the claim text.