Shift hydraulic control circuit of dual-clutch gearbox

Abstract

The invention provides a shift hydraulic control circuit of a dual-clutch gearbox, comprising a shift hydraulic circuit which is constituted by two shift two-position three-way electromagnetic valves and a shift multiway valve and which controls the action of a shift cylinder, and the movement of the shift multiway valve is controlled by the pressure control device. Compared with the shift hydraulic pressure circuit in the prior art, the circuit of the shift magnetic valve in the invention has selectivity, can reduce the usage amount of the electromagnetic valve by a half and can obviously reduce the complexity degree of the hydraulic system; the combination of the clutch hydraulic circuit, the two shift two-position three-way electromagnetic valve, the shift multiway valve and the pressure control device greatly simplifies the dual-clutch gearbox shift hydraulic pressure control system, optimizes the hydraulic circuit, leads the design and manufacturing of the valve block to be easier, lowers the system cost, leads the volume of the valve block to be small and is suitable for the use requirement of coupes.

Description

technical field [0001] The invention relates to a hydraulic control circuit, in particular to a gear shift hydraulic control circuit of a dual-clutch gearbox. Background technique [0002] The clutch and shift control of the dual-clutch automatic transmission is the core control part of the dual-clutch automatic transmission. Due to the stable control performance of the wet multi-disc clutch, large heat capacity, mature and convenient hydraulic control, and good control performance, it is obtained in the dual-clutch automatic transmission system. a wide range of applications. The scheme of dual-clutch clutch shift control directly affects the performance, cost and implementation of the system. In the existing hydraulic shift control system of dual-clutch automatic transmission, the odd-numbered clutches and the even-numbered clutches are respectively controlled by two independent solenoid valves. However, the shift control schemes are relatively complicated. For example, in...

AI Technical Summary

Problems solved by technology

The scheme of dual-clutch clutch shift control directly affects the performance, cost and implementation of the system. In the existing hydraulic shift control system of dual-clutch automatic transmission, the odd-numbered clutches and the even-numbered clutches are respectively controlled by two independent solenoid valves. However, the shift control schemes are relatively complicated. For example, in patents US2006005647 and US20060009326A1, two-stage hydraulic control is used in the shift pressure control circuit. First, the odd circuit (first gear, third gear) is obtained through two pressure control valves gear, 5th gear, N gear) and dual circuits (2nd gear, 4th gear, 6th gear, R gear), and then divide the two pressure oil circuits into 4 oil circuits through 4 ON / OFF switch valves, and then pass The shift control valve controlled by the solenoid valve transmits the pressure to the corresponding piston pressure control chamber. The system has many solenoid valves and complex structure, and the system cost is quite high.

The complex system also makes the design and manufacture of the valve block difficult, and the volume is large, which cannot be used on small cars.

Images