摘要:
A method for controlling driving on a hill of an all-wheel drive vehicle, wherein vehicle acceleration is determined and the gravitational acceleration is measured. To improve the accuracy of the determination of the vehicle reference speed in all-wheel drive vehicles, the method comprises the following steps: determining the acceleration at the secondary axle (Tc4wdHaAcc) from one or both of the two wheel speeds, determining the deviation (Slope) between the acceleration at the secondary axle (Tc4wdHaAcc) and the measured acceleration (LoSenAcc), filtering the determined deviation (SlopFilt) with a time constant (T1Slope), comparing the deviation (Slope) with the filtered deviation (SlopFilt), determining driving situations representing the conditions ‘traction slip control is active’ or ‘traction slip control is not active’, and determining the slope in dependence on the comparison result and the driving situation.
摘要:
A method of improving the control performance of a traction slip control system so that faulty control activations of the TCS control system are prevented in critical situations such as driving downhill. The invention concerns a method wherein a vehicle reference speed and a vehicle deceleration signal are derived from the rotational behavior of the vehicle wheels and wherein a vehicle deceleration signal is obtained by way of a longitudinal deceleration sensor. The course of the two deceleration signals is compared and analyzed for detecting stable or unstable wheel rotational behavior. Preferably a difference signal is formed indicating the difference between the two deceleration signals. The difference signal is evaluated by a multistage filter arrangement.
摘要:
Disclosed is a method and a computer program product for compensating for gradient influence when determining a reference velocity. The method includes determining a controller nominal torque (MRnominal) in a vehicle controller (1) from at least one actual wheel speed (vwheel-actual) and one predefined nominal wheel speed (Vwheel-nominal), determining a feedback torque (Mfeedback), which is proportional to an estimated roadway gradient ({dot over (ω)}wheel−{dot over (ω)}longit.), calculating an engine nominal torque (MMnominal) from the controller nominal torque (MRnominal) and the feedback torque (Mfeedback), and sending the engine nominal torque (MMnominal) to a vehicle controlled system (2) for determining the actual wheel speed (vwheel-actual) from the engine nominal torque (MMnominal).
摘要翻译:公开了一种用于在确定参考速度时补偿梯度影响的方法和计算机程序产品。 该方法包括:从车辆控制器(1)中的至少一个实际车轮速度(v>轮实际<! - SIPO - >和一个预定义的标称值确定控制器额定转矩(M N R nominal) 确定与估计的道路坡度成比例的反馈扭矩(M SUB反馈 SUB>)({圆点(ω)轮) 根据控制器额定扭矩(M >Nninal)来计算发动机额定转矩(M N M M M m N m),其中, SUB>)和反馈扭矩(M SUB反馈),并将发动机额定转矩(M SUBMON MINI)发送到车辆控制系统(2),以确定实际车轮速度 (> wheel actual actual actual actual actual。。。。。。。。。。。。。。。。)。
摘要:
Disclosed is a traction control system and method for a vehicle having at least one driven wheel (R, L) with an associated wheel brake, an engine, and an electronic controller encompassing at least two linear sub-controllers designed for different coefficient of friction situations. Each of the at least two linear sub-controllers (CL, CH; CLL, CLH, CHL, CHH) determines a function of a control deviation (e) of at least one wheel specific characteristic, a control variable suggestion (uL, uH; uLL, uLH, uHL, uHH) that includes a control variable suggestion for the wheel brake and a control variable suggestion for the drive engine, and an output control variable (u) including an output control variable for the wheel brake and an output control variable for the drive engine, is determined from the control variable suggestions (uL, uH; uLL, uLH, uHL, uHH) by weighted addition (1).
摘要:
Disclosed is a traction control system and method for a vehicle having at least one driven wheel (R, L) with an associated wheel brake, an engine, and an electronic controller encompassing at least two linear sub-controllers designed for different coefficient of friction situations. Each of the at least two linear sub-controllers (CL, CH; CLL, CLH, CHL, CHH) determines a function of a control deviation (e) of at least one wheel specific characteristic, a control variable suggestion (uL, uH; uLL, uLH, uHL, uHH) that includes a control variable suggestion for the wheel brake and a control variable suggestion for the drive engine, and an output control variable (u) including an output control variable for the wheel brake and an output control variable for the drive engine, is determined from the control variable suggestions (uL, uH; uLL, uLH, uHL, uHH) by weighted addition (1).
摘要:
The present invention relates to a method for controlling driving on a hill of an all-wheel drive vehicle, wherein vehicle acceleration is determined and the gravitational acceleration is measured. To improve the accuracy of the determination of the vehicle reference speed in all-wheel drive vehicles, the invention is characterized by the following steps: determining the acceleration at the secondary axle (Tc4wdHaAcc) from one or both of the two wheel speeds determining the deviation (Slope) between the acceleration at the secondary axle (Tc4wdHaAcc) and the measured acceleration (LoSenAcc) filtering the determined deviation (SlopFilt) with a time constant (T1slope) comparing the deviation (Slope) with the filtered deviation (SlopFilt) determining driving situations representing the conditions ‘traction slip control is active’ or ‘traction slip control is not active’determining the slope in dependence on the comparison result and the driving situation.
摘要:
A ceramic cutting tool configured as multiphase ceramic with an improved resistance to wear of the edge area or edge layer consists of a base ceramic and of a sacrificial phase as well as eventually additives and primary hard material phases and an eventually multilayered edge area or edge layer resistant to wear, hard, not deposited made of at least one hard material phase, whereby the edge area is intimately intergrown with the starting ceramic and which is formed by aging the starting ceramic in a defined atmosphere.