Hydraulic module for transmission

Abstract

The invention discloses a hydraulic mold of a speed changing box. A main oil pressure pipeline is connected with the oil inlets of four electromagnetic valves, a first mechanical valve and a second mechanical valve; the oil outlet of a first proportional valve is connected with the left-side oil inlet and the spring opposite side of a third mechanical valve; the oil outlet of a second proportional valve is connected with the right-side oil inlet and the spring opposite side of a fourth mechanical valve; the oil outlet of a first switching valve is connected with the spring side of the first mechanical valve; the oil outlet of a second switching valve is connected with the spring side of the second mechanical valve; the oil outlet of the first mechanical valve is connected with the right-side oil inlet and the spring side of the third mechanical valve; the oil outlet of the second mechanical valve is connected with the oil outlet and the spring side of the fourth mechanical valve; the oil outlet of the third mechanical valve is connected with the other clutch and the spring opposite side of the second mechanical valve; the oil outlet of the fourth mechanical valve is connected with another clutch and the spring opposite side of the first mechanical valve. The hydraulic mold of the speed changing box is capable of the case of dual locking of the shaft system of the two clutches, and meanwhile, does not intervene with independent control on the two clutches by use of a TCU within a safety threshold.

Description

technical field [0001] The present application relates to a gearbox for shifting through two clutches, and in particular to a hydraulic module therein. Background technique [0002] Gearboxes that shift gears by switching between two clutches include dual-clutch gearboxes (DCT) and automatic transmissions (AT). The technical difficulty lies in the control of the two clutches during the gearshift process. Take the DCT as an example, it has two clutches, one clutch is disengaged while the other clutch is engaged when shifting gears. Take the AT as an example, it has multiple clutches (and brakes), only two clutches act during sequential gear shifting, and one clutch is disengaged while the other clutch is engaged. [0003] see figure 1 , which is a non-complete hydraulic module of the existing DCT, also applies to the AT. The hydraulic module controls two clutches respectively by two solenoid valves 1 and 2 which are independent of each other. The thick solid line indicate...

AI Technical Summary

Problems solved by technology

However, because the oil pressures of the two clutches are interrelated, they cannot be controlled independently, which affects the effect of shifting gears.

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