초록 ▼

A control system for a vehicle with an engine-CVT power train senses operator's desire relative to movement of the vehicle and translates the sensed operator's desire into a predetermined variable indicative of drive force applicable to the vehicle drive wheel. In integrated control mode, the predet

A control system for a vehicle with an engine-CVT power train senses operator's desire relative to movement of the vehicle and translates the sensed operator's desire into a predetermined variable indicative of drive force applicable to the vehicle drive wheel. In integrated control mode, the predetermined variable indicative of drive force controls the engine throttle and the ratio of the CVT. In individual control mode, the integrated control is put out of operation and the sensed operator's desire controls the engine throttle and the ratio of the CVT. The control system provides an improved control over the transition period between the control modes.

대표청구항 ▼

[ What is claimed is:] [1.] A control system for a vehicle including an engine coupled to apply torque to at least one drive wheel of the vehicle by means of a transmission with a ratio actuator, the ratio actuator being positioned to establish various speed ratios between input and output shafts of

[ What is claimed is:] [1.] A control system for a vehicle including an engine coupled to apply torque to at least one drive wheel of the vehicle by means of a transmission with a ratio actuator, the ratio actuator being positioned to establish various speed ratios between input and output shafts of the transmission in response to a ratio actuator command, the engine having a throttle which opens in degrees and a throttle actuator positioned to establish various open degrees of the throttle in response to a throttle actuator command, the control system comprising:sensors sensing an operating parameter indicative of vehicle operator's desire relative to movement of the vehicle and operating parameters indicative of the vehicle status that includes a vehicle speed, an engine speed, and a speed ratio between the input and output shafts of the transmission,a drive force request command generator translating the vehicles operator's desire into a first target value indicative of drive force applicable to the drive wheel for operation in an integrated control mode;a mode change command generator determining whether or not the integrated control mode should be in operation and generating a mode signal;a speed command generator generating a speed command in response to said first target value indicative of drive force;means for generating the ratio actuator command required for the ratio actuator to get said speed command out of the transmission;a drive force calculation generator estimating a second target value indicative of drive force applicable to the drive wheel for application in an individual control mode;a transition controller processing said first and second target values and generating a drive force command;an engine torque command generator generating a torque command in response to said drive force command; andmeans for generating the throttle actuator command required for the throttle actuator to get said torque command out of the engine.