6 results about "Parking pawl" patented technology

This invention discloses a segmented engagement control method for a parking pawl in an electromechanical brake, applicable to a system including a motor, transmission mechanism, brake, ratchet fixed on the motor shaft, pawl, electromagnet, and controller. The method first drives the motor to rotate forward until the clamping force of the brake reaches a target value. Then, it drives the electromagnet to eject the pawl. Next, it drives the motor to rotate in the reverse direction at a preset backlash-eliminating target speed to reduce the gap between the pawl and ratchet, while maintaining the clamping force above a safe lower limit. During the reverse rotation, locking contact is determined based on a combined criterion of current change rate and speed resistance. After determination, a restricted reverse drive is maintained for a preset guiding time to allow the ratchet to slide into the tooth groove along the pawl's working surface. Then, the current is gradually reduced to near zero according to a preset unloading trajectory. When both the motor angular velocity and current are below the threshold and remain below for a preset time, mechanical locking is determined to be complete, and the motor drive is disengaged.

This more reliably prevents the parking pole from contacting the parking gear while the vehicle is in motion. [Solution] A parking lock device comprising a movable member that moves between a first position and a second position according to the shift range, a parking gear, a parking pawl, and a regulating member. The parking pawl moves in conjunction with the movable member and is positioned in a non-engaging position where it does not engage with the parking gear when the movable member is in the first position, and in an engaged position where it engages with the parking gear when the movable member is in the second position. The regulating member moves in conjunction with the movable member and is positioned in a regulating position where it restricts the parking pawl from moving from the non-engaging position to the engaged position when the movable member is in the first position, and retracts from the regulating position when the movable member moves from the first position to the second position.

A park securement system includes a park pawl system and a controller. The park pawl system has a park pawl, an actuator, a park gear and a sensor. The park pawl has a pawl engagement member, a park tooth, and a magnet. The actuator is configured to rotate a cam into engagement with the park engagement member that imparts rotational motion onto the park pawl. The sensor is configured to sense the magnet and communicate a signal indicative of a position of the park pawl. The controller is configured to: command the park pawl to a neutral resting state; record a park pawl value at the neutral resting state; determine a park pawl angle for additional regions based on the recorded park pawl value; and implement the determined park pawl angle for additional regions when one of engaging and disengaging the park pawl on subsequent cycle.

The present disclosure relates to a system and method to stop precession of a flywheel enclosure used in a gyroscopic roll stabilizer in aquatic vessels. The system and method includes the use of a pawl safety latch capable of interlocking connection with a gimbal shaft to prevent rotation of the gimbal shaft and prevent precession of the corresponding flywheel enclosure.

A parking lock device may include: a movable member moving between a first position and a second position according to a shift selector position; a parking gear; a parking pawl; and a restriction member. The pawl moves conjointly with the movable member such that the pawl is in a non-engaged position of not engaging with the gear when the movable member is in the first position, and is in an engaged position of engaging with the gear when the movable member is in the second position. The restriction member moves conjointly with the movable member such that the restriction member is positioned in a position of restricting the pawl from moving from the non-engaged position to the engaged position when the movable member is in the first position, and the restriction member retreats from the restriction position when the movable member moves from the first position to the second position.

This invention provides a vehicle control device that avoids adverse conditions caused by overheating of the drive motor and does not increase the cost of the control structure, and can suppress rollback when parking on an incline. The vehicle control device includes: a drive motor for driving the vehicle; a drive shaft connected to the drive motor; a parking gear fixed to the drive shaft; a parking pawl engaged with the parking gear; an actuator that, through operation of a parking switch, moves the parking pawl to a locked position and a unlocked position, locking the drive shaft; a slope detection component for detecting the vehicle's slope; a rotation angle detection component for detecting the rotation angle of the drive motor; and a motor angle control component that, after the actuator operates, rotates the drive motor by a predetermined angle, this predetermined angle corresponding to the slope detected by the slope detection component.