Gear change controller for automatic gearbox has engine torque change device that outputs command to change torque reduction value based on detecting the start of a change process

摘要

The gearbox has input (3) and output (16) shafts, several frictional engagement elements for changing force transfer paths between the input and output shafts, hydraulic servos for engaging/disengaging the friction elements, a hydraulic pressure controller, an engine controller, a control stage for outputting signals to the hydraulic and engine controllers depending on the driving state, a device for determining a multi-stage gearchange process, a hydraulic pressure command device for gear changing, a device for detecting the start of a gear change and an engine torque change device that outputs a command to change a torque reduction value based on detecting the start of a change process.