Patent application number | Description | Published |
20090210127 | Closed-Loop Control of Brake Pressure Using a Pressure-Limiting Valve - A device for controlling the brake pressure in a hydraulic brake system with the aid of a pressure-limiting valve that limits the brake pressure to a predefined threshold value, and to that end is driven by an electronic device in accordance with a valve characteristic curve. The setting accuracy can be improved considerably if an estimating unit for estimating the brake pressure, a sensor system for measuring the brake pressure, a unit for determining a pressure difference between the measured brake pressure and the estimated brake pressure, as well as a controller unit which drives the pressure-limiting valve as a function of the pressure difference are provided. | 08-20-2009 |
20100270961 | Method and Device for Controlling an Electric Motor ( amended - A method and a device for controlling and/or regulating an electric motor. Such electric motors are used for example in motor vehicles in the form of pump motors. In general, the electric motor is supplied with electrical energy from a battery and/or using a generator. The controlling and regulation take place using a high-frequency pulse width modulation (PWM). When the electric motor is started, the PWM is used to continuously increase the motor current required for the operation of the electric motor, e.g. beginning from 0. | 10-28-2010 |
20110166762 | BRAKE SYSTEM AND METHOD FOR OPERATING A BRAKE SYSTEM - A method for controlling a brake system including receiving a braking signal for setting a braking action by the brake system, ascertaining a minimum rate of pressure increase in the brake system in order to effect the braking action within a predefined response time, and setting a pumping capacity of a pump of the brake system so that the pressure in the brake system increases in accordance with the minimum rate. | 07-07-2011 |
20110254361 | BRAKE SYSTEM FOR MOTOR VEHICLES - A brake system for motor vehicles, having a pump for conveying brake fluid into a brake pressure line; a motor able to be connected to an on-board voltage source, for driving the pump; and a control device for the motor, wherein an electric energy-storage device is provided in addition to the on-board voltage source, and the control device is designed to connect the motor to the energy-storage device intermittently. The energy-storage device may be a booster battery or a capacitor. | 10-20-2011 |
20120319466 | Method for activating a switching valve in a hydraulic motor vehicle brake system - In a method for carrying out an automatic braking in a motor vehicle with the aid of a pump which delivers a brake fluid in the direction of the wheel brakes, the brake pressure prevailing in the brake circuit is limited by a valve, which is overflowed when a settable pressure threshold is reached, and thus limiting the brake pressure. The dynamics of the pressure build-up is improved if the valve opens only at higher pressures, since a greater share of the volume flow coming from the hydraulic pump is then in fact conducted to the wheel brakes and is not able to flow off prematurely via the valve. | 12-20-2012 |
20130338896 | METHOD FOR SETTING THE CLAMPING FORCE APPLIED BY A PARKING BRAKE - In a method for setting the clamping force applied by a parking brake, an electromechanical clamping force portion is set in an electromechanical brake device, and an auxiliary clamping force is set in an auxiliary brake device. A parameter of the electric actuator is regulated to a defined value, while a state variable of the auxiliary brake device, which determines the auxiliary clamping force, is simultaneously set to a setpoint value without feedback control. | 12-19-2013 |