Abstract:
In a method for controlling electromechanical brakes of a vehicle brake system, the brakes have at least one self-boosting device and the method has steps for switching a first sub-group of the electromechanical brakes (10) from a first operating position (27) into a second operating position (28) and for varying the brake force (41) of a second sub-group of the electromechanical brakes (10) during the switch of the first sub-group of the electromechanical brakes (10) such that the overall brake force applied by the vehicle brake system substantially always corresponds to the brake force setpoint value (46) for the vehicle brake system.
Abstract:
A method and an apparatus for controlling the speed of a motor vehicle in particular during a hill ascent are described. In a PID controller acting upon the brake system of the motor vehicle the change of the vehicle inclination is fed into the I branch of the controller, thereby providing an adaptive speed control.
Abstract:
An apparatus and method of determining a driving state of a moving object using a gravity value sensor and a speed measurement device is provided. Specifically, disclosed is an apparatus and method that can determine whether a moving object is in a level driving state or in an inclining/declining-slope driving state using a Y-axis measurement value of an acceleration sensor and a speed of a speed measurement unit.
Abstract:
A control system for a machine is disclosed. The control system may have a first sensor configured to generate a first signal indicative of an inclination of the machine, a second sensor configured to generate a second signal indicative of a travel speed of the machine, a third sensor configured to generate a third signal indicative of an engine speed of the machine, and a controller disposed in communication with each of the first, second, and third sensors. The controller is configured to determine whether the machine is freewheeling in a neutral gear, and to generate a machine braking command based on at least one of the first, second, and third signals. A method of retarding a machine is also disclosed.
Abstract:
A method for controlling a drive system and/or a wheel braking system, a total braking torque consisting of a drive braking torque and/or a wheel braking torque to be applied to the wheels of a motor vehicle is adjusted such that the desired wheel braking torque is reduced by an amount which can be compensated by a (preferably maximally) possible increase of the drive braking torque, when the wheel braking system is particularly loaded and when the vehicle velocity is approximately constant (steady-state) operating mode. However, the increase of the drive braking torque is limited to a predefined amount (preferably achievable in the fired coasting operation) when the wheel braking system is loaded less highly or the vehicle velocity changes (dynamic operating mode).
Abstract:
A vehicle control system has a plurality of subsystem controllers including an engine management system 28, a transmission controller 30, a steering controller 48, a brakes controller 62 and a suspension controller 82. These subsystem controllers are each operable in a plurality of subsystem modes, and are all connected to a vehicle mode controller 98 which controls the modes of operation of each of the subsystem controllers so as to provide a number of driving modes for the vehicle. Each of the modes corresponds to a particular driving condition or set of driving conditions, and in each mode each of the functions is set to the function in mode most appropriate to those conditions.
Abstract:
Method and apparatus for distributing brake torque between at least one first and one second brake device on a motor vehicle including at least two wheel pairs. The first brake device is a friction brake which acts on at least one wheel pair and the second brake device acts on at least the driven wheel pair via the transmission and is disposed before the clutch device of the transmission. Brake torque is distributed between the first and the second brake device in a manner that compensates for the loss of brake torque which occurs when the second brake device is disengaged by the clutch device of the transmission.
Abstract:
This apparatus determines that a driver demands the maintenance of a vehicle body speed from a cancel operation (ON→OFF) of an acceleration requiring operation by an accelerator pedal or a cancel operation (ON→OFF) of a deceleration requiring operation by a brake pedal BP, so that it detects a “body-speed-maintenance requiring operation” (at time t1), and stores the vehicle body speed Vso at the point of the detection as a “required maintenance vehicle speed Vref”. When the apparatus determines that the vehicle is on a downhill after the detection of the “body-speed-maintenance requiring operation” (time t2), it feedback-controls the brake hydraulic pressure Pw to thereby start and execute the automatic control (downhill speed control) of the vehicle body speed Vso such that the vehicle body speed Vso is maintained at the required maintenance vehicle speed Vref.
Abstract:
A method for controlling the speed of a vehicle, the method making it possible to maintain a predefined setpoint speed even on downhill grades. In the event that the actual speed of the vehicle exceeds the predefined setpoint speed by more than a first predefined speed difference, a service brake of the vehicle will be activated.
Abstract:
The invention is intended to provide a downhill speed control system which employs a method of setting a target vehicle speed in advance, thereby improving controllability when a vehicle runs down a slope, and giving an operator improved operability in setting of the target vehicle speed. Brakes are controlled so that, when the vehicle runs down the slope, an actual vehicle speed is matched with a target speed set by a switch which can set the target speed by selectively or continuously changing plural preset speeds. Also, control constants for PID control are modified depending on settings of a downslope gradient setting switch and a load setting switch. When an acceleration computed from the actual vehicle speed is larger than a target acceleration, the strength of applied brake is increased.