Zf Active Safety US Inc.

Kelsey-hayes Company

Lucas Automotive Gmbh

Zf Active Safety Gmbh

Lucas Automotive Gmgh

Kraig Eric Gerber

Galus Chelaidite

Manuel Barbosa

Eduardo Morais

Harry Miller

Mauro Marconcin

Joseph Willey

Antonio Eduardo De Morais

Guido ZenZen

Markus Mallmann

Daniel Alan Smith

Marco Becker

Frank Madzgalla

Paul Wecker

Anthony Dixon

Juergen Korte

Chad Brizendine

Tobias Lenarz

Raphael Mueller

Aaron Wahlfors

Philip Kexel

Christian L Schroeter

Florian Roessinger

Joerg Knieper

Peter Maeurer

Antonio Eduardo Morais

Daniel Schwarz

Jason Younglove

Changming Wu

Jon Wemple

Anthony Lawrence Delricci

Florian Rossinger

Bogdan Draghici

Mallmann Markus

Daniel Smith

The invention relates to a method for operating a vehicle brake system and to a vehicle brake system, wherein the vehicle brake system comprises at least one hydraulic vehicle brake (), having a brake caliper (), having a brake piston (), having a brake piston seal () which is assigned to the brake caliper () and which acts between the brake caliper () and brake piston (), having brake pads (), and having a brake disk (), in which method a hydraulic brake pressure acting on the brake piston () is built up in a manner dependent on a braking command. The brake pressure is furthermore held in a manner dependent on the braking command. If the braking command is withdrawn, the hydraulic brake pressure acting on the brake piston () is reduced to a hydraulic intermediate pressure, and the hydraulic intermediate pressure is held for a defined second period of time. The hydraulic brake pressure is subsequently reduced.

Method for operating a vehicle brake system, and vehicle brake system

A brake system is provided for a wheel rotor having a brake pad associated therewith. The brake system includes a housing defining first and second passages. First and second pistons are provided in the respective first and second passages for selectively moving the brake pad into engagement with the wheel rotor. First and second spindles are threadably coupled to the first and second pistons such that the pistons are axially movable relative to the spindles without the spindles rotating. Each spindle includes first threads separated by first cylindrical roots and each piston is coupled to second threads separated by second cylindrical roots.

Braking system with threaded connection

An electric actuator assembly for a drum brake assembly having a brake drum includes a housing and a gear nut configured for rotation by a motor and provided in the housing. A pin extends longitudinally within the housing and is associated with a first clevis for receiving a first brake shoe. A spindle extends longitudinally within the housing and is aligned with the pin. The spindle has a first threaded connection with a second clevis for receiving a second brake shoe and a second threaded connection with the gear nut. The distance between the first clevis and the second clevis increases in response to rotation of the gear nut to move the brake shoes towards the drake drum. The second clevis is urged towards the first clevis in response to cooling of the brake drum in order to back drive the spindle and gear nut and thereby reduce the distance between the first clevis and second clevis.

Actuator for drum brake assembly

An apparatus for a drum brake assembly having a brake drum includes a brake shoe and a pivot lever connected to the brake shoe. The pivot lever has a first condition movable with the brake shoe to apply braking force to the brake drum and a second condition deflected relative to the brake shoe for absorbing brake drum contraction forces.

Apparatus for drum brake assembly

A method for controlling vehicle braking of a wheel rotor having a brake pad associated therewith includes moving a piston into engagement with the brake pad by applying hydraulic pressure to the piston. The piston is locked in place against the brake pad with a parking brake. The hydraulic pressure is removed from the piston while the parking brake is locked.

Method of controlling an electronic parking brake

An electric brake for a wheel rotor having a brake pad includes a housing with a passage. A piston assembly in the passage includes a spindle and a piston. The spindle is rotatable to cause the piston to move axially relative to the brake pad. A drive assembly includes a motor. A gear train is connected to the motor and the spindle. A coupling mechanism is coupled to the gear train and has a first condition enabling torque transmission from the motor to the spindle to axially move the piston to apply braking force to the brake pad. The coupling mechanism has a second condition disabling torque transmission from the motor to the spindle is prevented which permits the piston to retract and reduce the braking force on the brake pad without stopping or reversing the motor.

Electric brake for vehicle

A brake clip for a disc brake assembly having a brake pad received in an anchor bracket includes a shim configured to be received in the anchor bracket. The shim includes a base leg and opposing upper and lower legs extending from the base leg to define a receiving space. At least one of the upper and lower legs includes a retaining member extending in a first direction. A spring is provided in the receiving space for receiving the brake pad. The spring includes a base and a pair of projections extending from the base. At least one of the projections includes a retaining member that cooperates with the at least one retaining member on the shim to allow for a predetermined amount of relative movement between the shim and the spring in the first direction.

Nested brake clip

A parking brake for a wheel rotor having a brake pad associated therewith includes a housing defining first and second passages. First and second pistons are provided in the respective first and second passages. Spindles extend into and are connected with each piston. A clutch unit is connected to the spindles and includes a motor. The clutch unit has a first condition allowing for rotation of the spindles in response to hydraulic pressure applied to the pistons such that the pistons are axially movable within the passages and relative to the spindles into engagement with the brake pad. The clutch unit has a second condition for rotating the spindles to drive the pistons into the brake pad and apply the parking brake.

Electronic parking brake

A parking brake for a wheel rotor having a brake pad associated therewith includes a housing defining first and second passages. First and second pistons are provided in the respective first and second passages. Spindles are threadably connected with each piston. A clutch unit is connected to the spindles. The clutch unit has a first condition allowing relative rotation between the spindles and the pistons such that the pistons are axially movable within the passages and into engagement with the brake pad in response to hydraulic pressure applied to the pistons. The clutch unit has a second condition preventing relative rotation between the spindles and the pistons such that pistons remains engaged with the brake pad when hydraulic fluid pressure is removed from the pistons.

A system for controlling an electric brake for a wheel rotor having a brake pad associated therewith includes a housing defining a passage. An assembly is provided in the passage and includes a spindle rotatable about an axis and a piston aligned with the brake pad and axially movable in response to rotation of the spindle. A planetary gear stage includes a sun gear, a ring gear, and planetary gears. A first motor is coupled to the sun gear. A second motor coupled to the ring gear. A control system is configured to, in response to a detected braking event, rotate the first motor in a first direction to supply torque to the sun gear while the second motor is rotated in a second direction at varying speeds to supply torque to the ring gear such that the piston is cyclically moved towards and away from the brake pad to modulate a braking force on the rotor.

An electromechanical brake apparatus includes a housing supporting an inboard brake pad and an oppositely facing outboard brake pad for selective frictional contact with a rotor interposed longitudinally therebetween. An adjuster ramp assembly indirectly receives torque from the motor unit. A spindle is provided for selectively moving the inboard brake pad longitudinally. The spindle is operatively connected with the adjuster ramp assembly to indirectly receive torque from the motor unit therethrough. A leading ramp assembly is configured to transmit applied torque from the motor unit to the adjuster ramp assembly via at least one ramp ball longitudinally interposed therebetween. A predetermined amount and direction of torque is applied to each of the adjuster ramp assembly and the leading ramp assembly to assist with a selected one of (1) service brake application and (2) service brake release functions. The electromechanical brake apparatus is operative, at different times, for both functions.

Electromechanical brake apparatus and system with adjustment features

An electromechanical brake apparatus includes a housing supporting an inboard brake pad and an oppositely facing outboard brake pad for selective frictional contact with a rotor interposed longitudinally therebetween. The housing includes a mechanism cavity located longitudinally between the inboard pad and a motor having a motor output shaft. An adjuster ramp assembly indirectly receives torque from the motor. A spindle is operatively connected with the adjuster ramp assembly to indirectly receive torque from the motor therethrough. A leading ramp assembly is configured to transmit applied torque from the motor to the adjuster ramp assembly. The leading ramp assembly receives stepped-up torque from the motor via the motor output shaft and a ball thrust bearing at least partially located radially between the motor output shaft and an actuator ramp of the leading ramp assembly.

Electromechanical brake apparatus and system with gearless input from motor

An electrically actuated parking brake has a single electric motor producing a torque, a first torque limiting device with a first spring force, and a second torque limiting device with a second spring force. The first torque limiting device fully transmits a first portion of the torque to a first spindle until a first clamp force overcomes the first spring force and the second torque limiting device fully transmits a second portion of the torque to a second spindle until a second clamp force overcomes the second spring force. When the first clamp force overcomes the first spring force and the second spring force overcomes the second clamp force, the first portion of the torque that exceeds the first spring force is transmitted to the second spindle by the second torque limiting device.

Electric parking brake having a gearing with a torque limiting device

A roller screw system includes a spindle defining a longitudinal axis about which the spindle rotates. A nut at least partially radially surrounds the spindle. The nut is configured for longitudinal motion with respect to the spindle. At least one non-helically grooved roller is interposed radially between the spindle and the nut. A cage maintains the at least one roller in position radially between the spindle and the nut and supports the at least one roller for rotational motion. The nut is moved in longitudinally in a duty cycle responsive to transmission of rotational motion from the spindle to the at least one roller, and transformation of rotational motion of the at least one roller to longitudinal motion of the nut. A home position of the nut and a home position of the cage both move longitudinally after a predetermined number of duty cycles.

Roller screw system

An electric parking brake for a vehicle brake system includes a caliper, a piston, a spindle, an adjuster nut, a ring-like member affixed to the piston, and a biasing member. The piston may be disposed within a cavity of the caliper. The spindle is configured to drive the axial movement of the adjuster nut between a retracted position and an extended position via a threaded engagement wherein the adjuster nut is disposed within the piston. The biasing member may be disposed between the ring-like member and the adjuster nut so that, as the adjuster nut moves from an extended position to a retracted position which corresponds to a control signal, the biasing member urges the piston away from the rotor.

Growing community of inventors

Plymouth, MI, United States of America

Kraig Eric Gerber