Electronic control hydraulic drive mechanical type automatic gear shift system

Abstract

The invention discloses an electronic control hydraulic drive mechanical type automatic gear shift system, which comprises a parallel axis type gearbox, a drive motor and a gear selection and shift mechanism, wherein the gear selection and shift mechanism comprises a gear 1 and gear 2 shift mechanism, a gear 3 and gear 4 shift mechanism, a filter, a hydraulic pump, a check valve and an overflow valve. The gear 1 and gear 2 shift mechanism and the gear 3 and gear 4 shift mechanism comprise a gear 1 and gear 2 shift fork, a gear 3 and gear 4 shift fork, a gear 1 and gear 2 shift hydraulic cylinder, a gear 3 and gear 4 shift hydraulic cylinder and solenoid valves No.1 to No.4. An oil tank, the filter, the hydraulic pump and a port P of the overflow valve are sequentially connected through pipelines, a port A of the overflow valve is connected with ports P of the solenoid valves No.1 to No.4 through pipelines, ports A of the solenoid valves No.1 to No.4 are connected with oil ports on the gear 1 and gear 2 shift hydraulic cylinder and the gear 3 and gear 4 shift hydraulic cylinder through pipelines, and the gear 3 and gear 4 shift fork and the gear 1 and gear 2 shift fork are connected with a gear 3 and gear 4 meshing sleeve and a gear 1 and gear 2 meshing sleeve in the parallel axis type gearbox in a contact mode.

Description

technical field [0001] The invention relates to a vehicle automatic transmission device, more specifically, the invention relates to an electronically controlled hydraulic mechanical automatic shift system applied to electric vehicles and hybrid vehicles. Background technique [0002] Environmental pollution and energy crisis have made people pay more and more attention to environmental protection and effective and rational use of energy. High-efficiency, energy-saving and environmentally friendly electric vehicles have gradually become the development trend of the automotive industry, and their technology has also been greatly developed and improved. Electric vehicles and hybrid vehicles have different requirements for automatic shifting systems than traditional vehicles. Most of the automatic shifting systems used in the market are electronic control-pneumatic automatic shifting systems and electronic control-electric shifting systems. Electronic control- The use of hydrau...

AI Technical Summary

Problems solved by technology

The electronic control-pneumatic automatic shifting system is more useful for vehicles with air source, and can make full use of the air source, such as large or heavy vehicles, but due to the compressibility of gas, the shifting accuracy is not high, so for shifting There are fewer applications on vehicles with higher quality requirements

The shifting mechanism of the electric control-electric automatic shifting system is driven by a motor, which has high requirements on the external characteristics of the shifting motor, the high precision of component processing, and the complexity of the motor control system, resulting in a complex overall structure and high cost.

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