20 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.

The utility model discloses an integrated braking and parking device which comprises a pedal plate and a braking assembly in transmission connection with the pedal plate, and further comprises a parking plate in transmission connection with the pedal plate and provided with a braking groove of a one-way limiting structure. The parking pawl is connected with the fixing component through an elastic piece, and the elastic piece is used for forcing the parking pawl to be meshed with the braking groove so as to prevent the parking plate from returning; an energy storage element is arranged between the parking pin shaft and the parking pawl, and the energy storage element stores or releases energy when the distance between the parking pawl and the parking pin shaft changes; the guide structure is fixed on the parking plate and comprises a separation limiting part and a guide surface; braking, parking and unlocking are achieved through different strokes of the pedal. The vehicle brake system has the advantages that the problems that braking and parking of an existing vehicle brake system need to be controlled by two parts, and operability is poor can be effectively solved. The operation process of the driver is greatly simplified, the operation complexity is reduced, and the convenience in the driving process is improved.

An electromechanical brake system includes: an actuator assembly having an electric motor configured to generate torque for moving a brake pad assembly to apply or release a brake and a driven pulley configured to transmit the torque generated from the electric motor; a parking brake assembly having a parking pawl configured to engage against the driven pulley in a parking brake applied state of a vehicle and a pawl actuator configured to move the parking pawl to engage against the driven pulley; and an electronic control unit (ECU) that is configured to control the electric motor by determining whether the electric motor should be controlled to apply the torque in a direction of releasing the brake to ensure a stable engagement between the parking pawl and the driven pulley during the parking brake applied state of the vehicle using a change in motor rotation of the electric motor.

The purpose of this invention is to provide a technique for appropriately suppressing the ratchet effect when shifting to Park (P) gear, regardless of individual differences between vehicles. The solution of this invention is to determine whether a ratchet effect is present when performing parking control to shift to P gear. If a ratchet effect is detected (the determination in S3 is "yes"), parking control is stopped in S5, and the parking pawl moves to a non-parking position where it is disengaged from the parking gear. Therefore, regardless of individual differences between vehicles, such as dimensional errors in the parking pawl and parking gear, and accuracy errors in the vehicle speed sensor, the ratchet effect of the electric parking device can be appropriately suppressed.

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.

The invention relates to a method for operating a locking actuator (34) for a parking brake function, comprising: a ratchet wheel (38); -a parking pawl (46); -a parking pawl actuator (42) for displacing the parking pawl (46) from the reference position in the direction of the ratchet (38) by means of an actuating force; -a reverse spring (54) which urges or pulls the parking pawl (46) in the direction of the reference position, with the following steps:-rotating the ratchet wheel (38) in a first direction of rotation (74) until the parking pawl (46) is free; displacing the parking pawl (46) with a checking force (78) less than the actuating force; checking the rotational degree of freedom of the ratchet (38).

The invention discloses a system and method for operating a lubrication system having a brake-actuated valve. A lubrication system for a vehicle includes a heat exchanger having a lubricant inlet and a lubricant outlet, wherein the lubricant outlet has a first outlet branch and a second outlet branch. The lubrication system also includes a stator lubrication circuit, a rotor lubrication circuit, and a gearbox lubrication circuit fluidly connected between the lubricant inlet and the first outlet branch. The gearbox, the stator and the rotor lubrication circuit are fluidly connected in parallel with each other. The system also includes a parking actuator assembly having a parking pawl configured to move between a parking position and a release position allowing driveline gear movement, and a parking actuation valve configured to move when in the parking position into a first position that prevents lubricant flow through the second outlet branch, and to move when in the release position into a second position that prevents lubricant flow through the second outlet branch. And when in the release position moves into a second position allowing lubricant to flow through the second outlet branch.

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.

An all-terrain vehicle has a prime mover assembly which includes a tall and narrow gearbox. The collection of shafts in the gearbox include a (highest) input shaft, a (lowest) front output shaft, and a (forwardmost) reverse shaft, as well as a (rearwardmost) rear output gear. A shaft spacing aspect ratio of the vertical shaft spacing distance to the horizontal shaft spacing distance is greater than or equal to 0.85 and less than or equal to 1.4. A parking pawl control linkage has a pawl control wheel, with a park lobe, rotationally mounted about an axis of the shifting shaft used for gear shifting. Rotation of the shifting shaft into park causes rotation of the pawl control wheel such that the park lobe pushes on the parking pawl to move the parking pawl from the disengaged position to the engaged position.

To enable detection of damage to parking poles. [Solution] The vehicle includes a parking gear, a parking pawl attached to the first pivot shaft and configured to rotate between a first position in which it engages with the parking gear and a second position in which it disengages from the parking gear, a rod configured to move in the axial direction, a cam attached to the rod that rotates the parking pawl from the second position to the first position in accordance with the axial movement of the rod, a stopper receiver provided on the rod, and a stopper attached to the second pivot shaft and configured to rotate between a third position in which it contacts the parking pawl but cannot contact the stopper receiver and a fourth position in which it can contact the stopper receiver. If the parking pawl is damaged, the stopper rotates from the third position to the fourth position, and the stopper receiver contacts the stopper rotated to the fourth position, thereby restricting the axial movement of the rod.

A park pawl motor override system and corresponding method of use includes utilizing a park pawl override tool to selectively engage and / or disengage a park pawl mechanism under certain vehicle conditions including loss of 12V power and / or loss of vehicle serial communication; disengaging a 12V power supply of the vehicle from a wiring harness; coupling the override tool to a vehicle breakout interface, where the vehicle includes a dedicated, direct communication and power connection between the breakout interface and the park pawl mechanism; coupling an off-vehicle 12V power supply to the override tool; and operating the override tool to provide power and control signals to the park pawl mechanism to control the park pawl mechanism to selectively move to a disengaged position and / or to an engaged position while the vehicle is under the loss of 12V power and / or loss of vehicle serial communication with the park pawl mechanism.

An electromechanical brake (EMB) system is provided. The EMB system includes: an actuator assembly including an electric motor configured to generate torque for moving a brake pad assembly to apply or release a brake and a driven pulley configured to transmit the torque generated from the electric motor; a parking brake assembly including a parking pawl configured to engage against the driven pulley in a parking brake applied state of a vehicle and a pawl actuator configured to move the parking pawl to engage against the driven pulley; and an electronic control unit (ECU) configured to heat up the parking brake assembly in response to obtaining a parking brake apply request under one or more below freezing ambient temperature conditions.

The application discloses a parking ratchet, comprising: a main ratchet plate, a first spline for connecting a main shaft is arranged in the middle position of the main ratchet plate, a plurality of first clamping holes for clamping with a pawl are symmetrically arranged on the outer wall of the first ratchet plate; two side ratchet plates are respectively embedded on the two end surfaces of the main ratchet plate, and a second spline is arranged on each side ratchet plate corresponding to the first spline, and a plurality of second clamping holes are arranged on each side ratchet plate corresponding to the plurality of first clamping holes; the hardness of the two side ratchet plates is greater than that of the main ratchet plate. The application realizes the application of different metal materials in the parking ratchet by the main ratchet plate and the two side ratchet plates, greatly improves the physical performance of the parking ratchet, and has the beneficial effects of enhancing wear resistance, improving bearing capacity, improving fatigue strength and improving safety.

A lubrication system for a vehicle includes a heat exchanger having a lubricant inlet and a lubricant outlet with the lubricant outlet having a first outlet branch and a second outlet branch. The lubrication system also includes a stator lubrication circuit, a rotor lubrication circuit, and a gearbox lubrication circuit fluidly connected between the lubricant inlet and the first outlet branch. The gearbox, stator, and rotor lubrication circuits are connected fluidly in parallel with each other. The system also includes a park actuator assembly having a parking pawl configured to move between a parking position and a release position allowing movement of the drivetrain gear and a park actuated valve configured to move into a first position blocking lubricant flow through the second outlet branch when in the parking position and into a second position allowing lubricant flow through the second outlet branch when in the release position.

The invention relates to a vehicle drivetrain with an electric motor (EM) that drives at least one vehicle wheel, and with a parking pawl (PS) whose parking pawl gear (3) is arranged on an output shaft (1) of the vehicle drivetrain in a torque-transmitting manner, and whose pawl (5) is in a locked position in tooth engagement with a tooth gap (L1 to L7) of the parking pawl gear (3). According to the invention, a test unit (15) is associated with the electric motor (EM) by means of which a gap detection (Δt) is performed in a learning routine. L ) is feasible, in which the test unit (15) has a gap rotor rotation angle position (α) corresponding to the tooth gap (L1 to L7). L ) of the electric machine rotor (13) determined.

A lubrication system for a vehicle includes a heat exchanger having a lubricant inlet and a lubricant outlet with the lubricant outlet having a first outlet branch and a second outlet branch. The lubrication system also includes a stator lubrication circuit, a rotor lubrication circuit, and a gearbox lubrication circuit fluidly connected between the lubricant inlet and the first outlet branch. The gearbox, stator, and rotor lubrication circuits are connected fluidly in parallel with each other. The system also includes a park actuator assembly having a parking pawl configured to move between a parking position and a release position allowing movement of the drivetrain gear and a park actuated valve configured to move into a first position blocking lubricant flow through the second outlet branch when in the parking position and into a second position allowing lubricant flow through the second outlet branch when in the release position.

The invention relates to a machining process of a cold-rolled steel coil for fine blanking of a gearbox parking pawl. The machining process comprises the following steps that a hot-rolled steel coil is selected for stress relief annealing; primary longitudinal shearing and splitting are carried out; performing acid pickling; softening annealing is conducted; carrying out primary rolling; primary spheroidizing annealing is carried out after head-tail reversing; carrying out secondary rolling; a secondary rolled steel coil is obtained; secondary spheroidizing annealing is carried out after head-tail reversing; rolling for the third time; secondary longitudinal shearing and splitting are carried out; and packaging the finished strip cold-rolled steel coil. In order to overcome the defects that in the prior art, a thick plate is uneven in cooling speed and large in structure difference caused by large change of head, middle and tail coiling cooling speed, through process improvement, head and tail reversing is conducted after two times of rolling, and then two times of spheroidizing annealing is conducted, the conditions that crystal grains grow too fast and granular pearlite is not evenly separated out due to the fact that the time of the same part of a bell-type furnace annealing heating source is too long are avoided; and the fine blanking adaptability is improved, the service life is prolonged, and the high-reliability requirement of a speed control system is met.