초록 ▼

In a so-called starting aid for motor vehicles, synchronism in the rpm of the drive wheels during starting is provided by feeding a brake pressure derived from the rpm difference of the drive wheels into the wheel brake cylinder associated with the wheel having the higher rpm. To this end, one brake

In a so-called starting aid for motor vehicles, synchronism in the rpm of the drive wheels during starting is provided by feeding a brake pressure derived from the rpm difference of the drive wheels into the wheel brake cylinder associated with the wheel having the higher rpm. To this end, one brake pressure controller having a control piston and a valve is installed in each brake line to the wheel brake cylinders of at least two wheel brakes. The control pistons are actuated in opposite directions via a final control element to which a control signal derived from the rpm difference is supplied. Upon displacement, whichever control piston is driven closes the valve and feeds brake pressure into the associated wheel brake cylinder. In order that the starting aid will have a high control speed and a small structural volume, the final control element is embodied as an electric control motor.

대표청구항 ▼

An apparatus for synchronizing the rpm of drive wheels upon starting of a motor vehicle equipped with a pressure-fluid-controlled brake system having suitable brake lines extending to the brakes by application of metered brake pressure to the wheel having the higher rpm, at least two brake pressure

An apparatus for synchronizing the rpm of drive wheels upon starting of a motor vehicle equipped with a pressure-fluid-controlled brake system having suitable brake lines extending to the brakes by application of metered brake pressure to the wheel having the higher rpm, at least two brake pressure controllers incorporated one in each brake line between a master brake cylinder of the brake system and one wheel brake cylinder of one of the at least two drive wheels, said controllers each having one control piston axially displaceable in a control cylinder counter to a restoring spring and one valve each in said control cylinder actuated by said control piston arranged to control the connection opening of the control cylinder to the master brake cylinder, a final control element adapted to drive the control piston in contrary directions actuatable by a control signal derived from the rpm difference between the at least two drive wheels, and an electric reversible control motor (46) adapted to drive one or the other of said control pistons (28), said control motor (46) is a rotary motor which includes a shaft (47) which acts upon said control pistons (28) of the brake pressure controllers (24, 25) via a conversion gear (48; 248; 348) and thereby is adapted to convert the rotational motion into a displacement motion.