Robert Boschgmbh

Thomas Isella

Johannes Schmitt

Alfred Sigl

Wolf-Dieter Jonner

Karl-Heinz Willmann

Elmar Mueller

Roland Holzmann

Hans-Juergen Herderich

Helmut Pueschel

Rolf Hummel

Johann Herr

Martin Moehle

Guenter Dzierzawa

Norbert Alaze

Leo Steinke

Guenther Schmidt

Ulrich Hessmert

Manfred W Meissner

Guenter Krenz

Arnold Pahl

Rainer Brueggemann

Erika Mank

Andreas Burg

Armin Czinczel

Michael Braun

A method and device for controlling the wheel performance of a vehicle is described. Wheel performance is influenced within the scope of an operating dynamics system or an electrical brake control system. In this context, a traction control system is used. At least one quantity representing the ambient temperature or the intake air temperature of an internal combustion engine is recorded, and the traction control system is adjusted as a function of this temperature quantity to emphasize stability at low temperatures and to emphasize traction at higher temperatures. In another variant, a pre-charging pump is activated, and a return pump for pre-pressurizing the circuit is activated and/or valves for building up or reducing pressure are triggered via opening pulses. At least one quantity representing the coolant temperature, the ambient temperature, or the intake air temperature of an internal combustion engine is recorded, and as a function of this measured temperature quantity, the length of the opening pulses is changed, the pre-charging pump is activated, and/or the circuit is pre-pressurized by at least one pump.

Method and device for controlling the wheel performance of a vehicle

A method and an apparatus for controlling the brake system of electric drive vehicles are proposed, in which the control of a friction brake and of an electric regenerative brake is divided between two pedals. The regenerative brake is controlled as a function of the actuation of the accelerator, independently of the extent to which the brake pedal is actuated.

Method and apparatus for controlling the brake system of electric drive

The invention relates to a hydraulic vehicle brake system with a master cylinder, with two brake circuits (I, II), with wheel brakes connected to the brake circuits (I, II), and with a wheel slip regulator device disposed between the master cylinder and the wheel brakes, which device has at least one brake pressure modulation valve device and at least one high pressure pump, and with a pump unit associated with this high pressure pump. In the automatic braking operation by means of at least one of the high pressure pumps, the pump unit is used for supplying hydraulic fluid to the high pressure pump. The pump unit has a low pressure pump in the form of a gear pump. To limit the pressure at an outlet of the low pressure pump at least one return flow conduit is provided between this outlet and an inlet, which conduit, in a manner according to the invention constitutes a throttle by which the choice of its cross section, which throttle is for controlling at least one return flow which increases with increasing pressure at the outlet and as a result achieves the pressure limiting. The hydraulic vehicle brake system can be used for cars, minibuses, and small trucks.

Hydraulic vehicle brake system with wheel slip regulator device

Vehicle hydraulic brake system

Antilock control system

Drive-slip control system

Wheel slip control system

Drive slip control system

To prevent slipping or spinning of a driven wheel which, selectively, can be braked or supplied with reduced torque from a vehicle engine, a reference speed is determined against which slipping or tendency to slip is measured. The reference value for slip measuring, derived from non-driven or rolling wheels, is tested for physically impossible conditions and, if such physically impossible conditions obtain, they are disregarded when determining slipping or tendency to slip. Proper speed values can be stored, utilized for subsequent measurement, directly or modified, which may also be made speed dependent, or dependent on differences between the speeds of two rolling wheels.

Method of controlling slipping or spinning of a vehicle wheel

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Markgroningen, Germany

Thomas Isella