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US 9,518,652 B2Granted
Apparatus and method for providing a manual override to shift by wire actuator
AssigneeInteva Products, LLC
InventorsIan J. Dow, John R. Rice, Donald M. Perkins
Life of this patent
Estimating the term…
Abstract
An actuator for a shift by wire system is provided. The actuator having: a motor; a rack; a gear train configured to cause linear movement of the rack in response to rotational movement of the motor; a clutch mechanism for coupling and decoupling the rack to the motor; and a manual override for operating the clutch mechanism.
Claims18
An actuator for a shift by wire system, comprising:
- a motor;
- a rack;
- a gear train configured to cause linear movement of the rack in response to rotational movement of the motor;
- a clutch mechanism separate from the rack for coupling and decoupling the rack to the motor, wherein the clutch mechanism further comprises a cam gear, wherein rotation of the cam gear in a first direction from an initial position to a first position decouples the rack from the motor and further rotation of the cam gear in the first direction to a second position linearly moves the rack.
1 more element
A shift by wire system for a vehicle transmission, comprising:
- an input device;
- a motor;
- a microcontroller operatively coupled to the motor and configured to receive signals from the input device to operate the motor;
- a sensor operatively coupled to the microcontroller and configured to receive signals from sensor, wherein the signals from the sensor are indicative of a position of the motor;
- a rack;
- a gear train configured to cause linear movement of the rack in response to rotational movement of the motor;
- a clutch mechanism separate from the rack for coupling and decoupling the rack to the motor, wherein the clutch mechanism further comprises a cam gear, wherein rotation of the cam gear in a first direction from an initial position to a first position decouples the rack from the motor and further rotation of the cam gear in the first direction to a second position linearly moves the rack.
4 more elements
A method of manually overriding a shift by wire system, comprising:
- decoupling a rack of the shift by wire system from a motor by rotating a cam gear from a first position in a first direction to an intermediate position wherein a clutch spool is moved from a first position, wherein the clutch spool couples the motor to the rack to a second position, wherein the clutch spool decouples the rack from the motor;
- and
- further rotating the cam gear in the first direction from the intermediate position to a second position wherein a lever moves the rack after it has been decoupled from the motor, wherein the cam gear is spring biased into the first position and the clutch spool is spring biased into the first position.
Dependencies are inferred from the claim text.