Transmission hydraulic control system and vehicle

Abstract

The invention relates to the technical field of vehicle hydraulic control systems, and discloses a transmission hydraulic control system and a vehicle. The hydraulic control system of the transmission includes a low-pressure oil circuit communicated with the first oil chamber, a high-pressure oil circuit communicated with the second oil chamber, an oil balance hole arranged between the first oil chamber and the second oil chamber, The fuel supply branch between the oil circuit and the second oil chamber and the pressure regulating valve arranged on the high pressure oil circuit. The hydraulic oil in the second oil chamber can enter the first oil chamber through the oil balance hole, the hydraulic oil in the low-pressure oil circuit can enter the second oil chamber through the oil supply branch, and several positions of the pressure regulating valve can be adjusted. The pressure of the high pressure oil circuit. Also disclosed is a vehicle comprising the above transmission hydraulic control system. The high-pressure oil circuit of the present invention can adjust the internal pressure of the high-pressure oil circuit according to different working conditions, and the utilization rate of hydraulic oil is high; the amount of hydraulic oil in the low-pressure oil circuit can not only ensure sufficient lubrication for the transmission, but also prevent excessive oil churning Loss, high transmission efficiency.

Description

technical field [0001] The invention relates to the technical field of vehicle hydraulic control systems, in particular to a transmission hydraulic control system and a vehicle. Background technique [0002] The main functions of the transmission hydraulic control system are control and lubrication. The control function includes controlling the closing and disconnection of the clutch and the switching between gears. The lubrication function includes providing cooling and lubricating hydraulic oil for gears, bearings and clutches. Among them, the demand of the control oil circuit for the power source is a high-pressure oil circuit with high pressure and low flow rate, and the demand for the lubricating oil circuit is a low-pressure oil circuit with low pressure and high flow rate. [0003] At present, the high-pressure oil circuit and the low-pressure oil circuit are usually set independently of each other to satisfy the control and lubrication of the transmission. In order ...

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Problems solved by technology

In order to ensure the oil supply pressure of the high-pressure oil circuit, the actual supply pressure of the high-pressure oil pump is much higher than the actual demand of the hydraulic system, but the pressure of the high-pressure oil circuit is greatly affected by the working conditions of the engine, and the required pressure is different under different working conditions, so the actual pressure is higher The low oil supply pressure usually causes problems such as low utilization rate of hydraulic oil and high energy consumption; in actual use, when the hydraulic oil in the high-pressure oil circuit acts on the clutch and shifting device, leakage will occur at a certain probability, and If it leaks into the first oil chamber, the hydraulic oil in the second oil chamber will gradually decrease for a long time, resulting in the failure of the high-pressure oil pump to absorb oil, while the amount of hydraulic oil in the low-pressure oil circuit will gradually increase, resulting in increased oil churning losses in the transmission , thereby reducing the transmission efficiency

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