Abstract:
A method of coordinating a plurality of intervention measures into a driving performance of a vehicle includes determining a wheel slip angle of a front axle, determining a coefficient of friction on the front axle, determining a wheel slip angle threshold value, comparing the wheel slip angle to the wheel slip angle threshold value, and initiating a first intervention measure through at least one of a brake system of the vehicle and a drive system of the vehicle if an absolute value of the wheel slip angle is greater than an absolute value of the wheel slip angle threshold value.
Abstract:
Using a model calculation, desired changes in the yaw rate .DELTA..phi. and the transverse acceleration .DELTA.y are determined from a small change actually made in the steering angle and are compared to measured quantities .DELTA..phi..sub.F and .DELTA.y.sub.F determined on the vehicle. The deviations of the actual values of yaw rate and transverse acceleration from the calculated values are weighted using predetermined weighting factors for the relative importance of yaw rate and transverse acceleration and supplied with factors dependent on the individual wheel; finally, the values relating to the same wheel are added. They represent desired changes in the brake slip values and a controller finally converts these into brake slip value changes.
Abstract:
An apparatus and a process for closed loop control of a motion quantity representing the vehicle motion which means determine the yaw rate of the vehicle, the longitudinal speed of the vehicle, and the transverse acceleration of the vehicle. Moreover, the apparatus influences the forward moment and/or the braking moment of individual wheels of the vehicle. The apparatus further determines a transverse acceleration component dependent on the roadway transverse inclination, as well as correcting the transverse acceleration of the vehicle at least as a function of the transverse acceleration component dependent on the roadway transverse inclination. The determination of the transverse acceleration component dependent on the roadway transverse inclination and also the correction of the transverse acceleration of the vehicle as carried out in a stable state of the vehicle characterized by the yaw rate and the transverse acceleration.
Abstract:
A method for improving the controllability of motor vehicles during braking wherein desired slip values are determined and adjusted with the aid of a wheel slip controller. According to the method, the following are measured: the yaw rate .psi., the steering angle .delta., the wheel speeds V.sub.Ri, the inlet pressure P.sub.inlet or wheel brake pressure P.sub.i, and, if required, the engine speed and the throttle valve angle. The following variables are estimated using the measured values: the longitudinal vehicle speed V.sub.X, the longitudinal vehicle acceleration V.sub.X, the wheel slip values .lambda..sub.i, the braking forces F.sub.Bi, the tire forces F.sub.Ri, and the transverse speed V.sub.Y. Desired slip values .lambda..sub.i * are then determined from these measured and estimated variables with the aid of a simple vehicle model and supplied to the slip controller to control the vehicle wheel brake pressure.
Abstract translation:一种用于在制动期间改善机动车辆的可控性的方法,其中借助于滑轮控制器来确定和调整期望的滑移值。 根据该方法,测量以下方程:偏航率+ E,点psi + EE,转向角增量,车轮速度VRi,入口压力Pinlet或车轮制动压力Pi,以及如果需要,发动机转速和 节气门角度。 使用测量值估计以下变量:纵向车辆速度+ E,cir V + EE X,纵向车辆加速度+ E,cir + E,点V + EE + EE X,车轮滑移值+ E,cir λ+ EE i,制动力+ E,cir F + EE Bi,轮胎力+ E,cir F + EE Ri和横向速度+ E,cir V + EE Y.然后,所需的滑移值λi * 通过简单的车辆模型从这些测量和估计的变量确定并提供给滑移控制器以控制车轮制动压力。
Abstract:
A method for controlling vehicle stability comprises the steps of determining the rate of yaw and comparing it to a setpoint rate of yaw. The deviation is used to adjust a counter rate of yaw by means of a controller when the rate of yaw is too large. An optimal profile for a setpoint rate of yaw is determined, even when parameters such as the coefficient of friction of the road surface and the vehicle speed vary.
Abstract:
A device and a method of controlling a movement parameter representing the movement of the vehicle, includes a first arrangement for detecting at least the transverse acceleration of the vehicle is proposed. The device also contains a second arrangement at least for determining a transverse acceleration component which depends on the transverse slope of the road surface and/or for correcting at least the transverse acceleration of the vehicle at least as a function of the transverse acceleration component. In the second arrangement a status of the vehicle whereby the transverse acceleration component which depends on the transverse slope of the road surface is determined at least as a function of the slip angle occurring on the rear axle of the vehicle.
Abstract:
An articulated fluid loading arm especially suited for transferring petroleum from a storage or loading terminal to a marine tanker, and for returning vapor from the tanker to the terminal, comprising a support boom pivotally mounted on the deck of the terminal, a pair of fluid conduits extending along the boom from risers at the terminal, and a dual flow-passage drop-pipe assembly suspended from an outboard end of the boom. The drop-pipe assembly comprises a pair of upper conduit members, a pair of lower conduit members and a pair of intermediate conduit members pivotally interconnected by a plurality of knee joints and swivel joints into a pair of articulated diamond-shaped structures. One set of upper, intermediate and lower conduit members comprises an assembly for the transfer of fluid from the terminal to the tanker, and the other set of conduit members provides an assembly for the return of vapors from the tanker to the terminal. A support cable extends from a tanker connection means on the lower end of the drop-pipe assembly to the outboard end of the boom and then along the boom to a winch for lowering, raising and supporting the drop pipe assembly.
Abstract:
A device is described for stabilizing a vehicle in critical driving situations, including a vehicle dynamics control system having a control unit, in which a vehicle dynamics controller is stored, at least one final control element, and a sensor system for measuring different driving condition variables, and including a rear-wheel steering system having a control unit and a final control element. The electronic stability program may be integrated into a control unit if the electronic stability program algorithm includes a distributor unit which, from a regulator output variable, generates both a setpoint requirement for the final control element of the vehicle dynamics control system and also a setpoint requirement for the final control element of the rear-wheel steering system.
Abstract:
In a vehicular control system in which target braking torques are set for each of the driven wheels, the smaller target braking torque for the driven wheels is determined. Based on this smaller target braking torque, a target engine torque is calculated, and the engine torque is varied to conform to the target engine torque. Residual braking torques are calculated as differences from the target braking torques for each driven wheel and the target engine torque. These residual braking torques are realized by varying the brake pressure. Therefore the target braking torque is split into an engine torque which is equal for both driven wheels and into a braking torque which may be different for each driven wheel.