Hydraulic mechanism cover cap of automobile double-clutch transmission

Abstract

The invention relates to a hydraulic mechanism cover cap of an automobile double-clutch transmission. The hydraulic mechanism cover cap comprises a cap body, wherein the cap body is a thin-wall casting part and is of a multilevel step shape; a solenoid valve wire threading hole and a plurality of avoiding bulges are arranged on the upper surface of the cap body and a plurality of bolt holes are formed in a cap edge on the lower side. The hydraulic mechanism cover cap has higher rigidity and inherent vibration mode frequency, and can avoid a phenomenon that resonance is generated by transmitted stimulation of the transmission; the vibration amplitude of the surface is smaller and the power per liter of the radiation of external noises is lower; the hydraulic mechanism cover cap has a good NVH (Noise Vibration and Harshness) performance. Furthermore, the cover cap is provided with a part for mounting a TCU (Transmission Control Unit) and an arrangement structure in a vehicle body is optimized.

Description

technical field [0001] The invention relates to auto parts, in particular to a cover cover of a hydraulic mechanism of an auto dual-clutch transmission. Background technique [0002] Automobile dual clutch automatic transmission (DCT, Double Clutch Transmission) is a promising new technology of automobile automatic variable speed transmission, which has the advantages of high transmission efficiency, high dynamic performance, comfortable shifting, low fuel consumption, etc. displacement cars and hybrid cars. In order to realize the automatic control of the transmission, a hydraulic control unit (HCU, Hydraulic Control Unit) is installed in the dual-clutch automatic transmission to control the shift execution. Realize the sealing of the transmission case. During the driving process of the car, the meshing vibration generated by the transmission gear is transmitted to the transmission bearing through the shaft, and then transmitted to the transmission case and the hydraulic ...

AI Technical Summary

Problems solved by technology

Although the hydraulic mechanism cover of the traditional automatic transmission has a certain sealing and sound insulation function, because the hydraulic mechanism cover of the traditional automatic transmission is designed with a stamped sheet metal structure, a small amount of reinforcement is added to the surface, so the structural rigidity is low. As a result, its natural mode frequency is small, and it is easy to generate resonance after being excited by the vibration transmitted by the transmission. At the same time, the side wall of the cover body and the top of the cover body are relatively flat planes with a large area, and the vibration amplitude generated on the surface of the cover cover is relatively large. Large, under the same excitation, the surface response of the structure is large, the surface noise radiation energy is large, the noise radiation sound power is high, and the NVH performance of the entire hydraulic mechanism cover is poor, which in turn affects the NVH performance of the vehicle

In addition, there is no TCU (Transmission Control Unit, automatic transmission control unit) installation position on the hydraulic mechanism cover of the traditional automatic transmission, and the TCU needs to be installed on a separate TCU mounting bracket, which is not conducive to optimizing the layout structure of the vehicle body

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