Abstract:
A method of operating an automatic speed control system of a vehicle in accordance with a set-speed. The method comprises receiving electrical signal(s) representative of a vehicle occupant-initiated brake command to slow the vehicle to a stop, and in response, suspending automatic speed control in accordance with said set-speed and commanding the application of a retarding torque to one or more wheels of the vehicle to bring the vehicle to a stop, while maintaining the speed control system in an active state. The method further comprises receiving electrical signal(s) representative of a vehicle occupant-initiated brake release command, and in response, and while maintaining the speed control system in an active state, automatically commanding the generation of drive torque sufficient to propel the vehicle in an intended direction and automatically controlling the speed of the vehicle in accordance with said set-speed.
Abstract:
A target acceleration/deceleration setting unit (28) of a vehicle acceleration/deceleration controller (16) sets a target acceleration or deceleration at a location at which a curve starts to be a predetermined maximum deceleration, sets a target acceleration or deceleration at a location at which the curve ends to be a predetermined maximum acceleration, sets a target acceleration or deceleration at a predetermined intermediate location between the location at which the curve starts and the location at which the curve ends to be zero, and sets a target deceleration D (Ld) at a location to which the travelling distance from the location at which the curve starts is Ld and a target acceleration A (La) at a location to which the travelling distance from the predetermined intermediate location is La to satisfy respective predetermined relations.
Abstract:
A method for autonomous emergency braking in a road vehicle to avoid or reduce the severity of an accident includes measuring the speed of the vehicle during autonomous emergency braking and additionally determining vehicle speed independent of the wheel rotational speeds of the vehicle. In this way, the vehicle speed can be determined sufficiently accurately even in the cases in which, as a result of sharp autonomous braking, the vehicle speed is higher than the wheel rotational speeds.
Abstract:
A method of controlling a brake system for a vehicle. A foundation brake may be applied to provide a foundation brake torque. Vehicle speed data, vehicle inclination data, and foundation brake pressure data may be obtained. A foundation brake torque profile may be determined that includes a set of vehicle speed values, a set of foundation brake pressure values, and a set of foundation brake torque values.
Abstract:
A vehicle control device includes an input unit configured to receive plural requests for a physical amount to be controlled in a vehicle; a judgment unit configured to judge whether or not a degree of priority of each of the received requests is high: a second mediation unit configured to, when there are plural requests whose degrees of priority are judged not to be high, mediate these plural requests to determine a control target value (Rm); a transfer unit configured to, when there is a request whose degree of priority is judged to be high, transfer this request as the control target value; and an output unit configured to output the control target value transferred from the transfer unit or determined by the second mediation unit to a VDC.
Abstract:
A method and system of providing steering in cruise control, in low friction conditions, at low speed and in low range. Speed of individual vehicle wheels is repeatedly and automatically adjusted to ensure that the actual rate of turn of the vehicle approaches the theoretical rate of turn as demanded by the vehicle driver.
Abstract:
A control unit of an assist controller for a vehicle estimates the visibility of a driver, calculates a visibility degradation ratio as a temporal change amount of the visibility, compares the visibility degradation ratio with a warning threshold that has been set in advance according to a vehicle speed, determines whether to warn the driver with a warning device, compares the visibility degradation ratio with a control characteristic change threshold that has been set in advance according to a vehicle speed, determines changes in control characteristics of the ABS function, skid preventing control function, and brake assist control function, compares the visibility degradation ratio with a deceleration control actuation threshold that has been set in advance according to a vehicle speed, and determines whether to execute automatic braking.
Abstract:
A method of decelerating a vehicle equipped with both regenerative powertrain braking from a motor/generator and friction braking from fluid pumped through a brake circuit. A deceleration demand is received, and regenerative braking torque is ramped up in response to the deceleration demand. The brake circuit is pre-charged during the ramping up of regenerative braking torque. Pre-charging the brake circuit includes pumping fluid to at least one wheel cylinder braking device to reduce the required pump speed and resulting noise for any subsequent braking demand on the brake circuit. The pump is actuated to operate at a predetermined speed that maintains noise and vibration below predetermined levels.
Abstract:
A driver assistance system for a motor vehicle includes at least one driving data sensor for sensing driving data that characterize the driving condition of the motor vehicle, and an electrical controller configured to initiate autonomous emergency braking of the motor vehicle when predetermined driving data has been sensed. A device is provided that is configured to detect a vehicle located in front of the motor vehicle in the direction of travel of the motor vehicle. The electrical controller maintains a brake of the motor vehicle in braking position or brings the brake into the braking position following an emergency braking action when a preceding vehicle is detected.
Abstract:
A method for detecting critical driving situations of motor vehicles, in particular for preventing collisions with an object in front of an own vehicle, has the following steps: detection of a current vehicle acceleration and a current vehicle velocity of an own vehicle; specification of an acceleration profile depending on driving variables of the own vehicle; assumption of a time progression of a foreseeable acceleration of the own vehicle based on its current acceleration; determination of a path profile of the own vehicle from the time progression of the foreseeable acceleration; acquisition of a current distance and a current relative velocity of an object in front of the own vehicle; calculation of the current absolute velocity of the object as well as of the absolute current acceleration of the object; assumption of a time progression of a foreseeable acceleration of the object based on its current acceleration; determination of a path profile of the object from the time progression of the foreseeable acceleration; comparison of the path profile of the own vehicle with the path profile of the object; and if the two path profiles intersect, determination of a probable collision time of the own vehicle with the object; establishment of a time before the probable collision time comparison of this time with the probable collision time determined; and if the probable collision time lies before the established time, issue of a warning to the driver of the own vehicle.