CN-224228985-U - Hydraulic control system

CN224228985UCN 224228985 UCN224228985 UCN 224228985UCN-224228985-U

Abstract

The utility model provides a hydraulic control system which comprises an oil tank, a power pump, a plug-in type integrated mechanical valve, a pressure regulating electromagnetic valve, a hydraulic actuator and an electric control unit. The oil tank is connected with the power pump, the plug-in type integrated mechanical valve is communicated with the power pump and the hydraulic actuator through an oil inlet P port and an oil outlet A port, and the pressure regulating electromagnetic valve realizes accurate regulation and control of oil pressure through the electric control unit. The system solves the problem of flow limitation of the traditional electromagnetic valve by the cooperative work of the high-flow on-off capacity of the plug-in mechanical valve and the precise pressure regulating characteristic of the electromagnetic valve, remarkably improves the response speed and the pressure control precision under the high-flow scene, and is suitable for high-pressure high-flow working conditions such as a vehicle braking system and the like.

Inventors

LU ZHIHONG
LI DEGANG
XU QIAN

Assignees

博格华纳联合传动系统有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (7)

1. The hydraulic control system is characterized by comprising an oil tank, a power pump, a plug-in type integrated mechanical valve, a pressure regulating electromagnetic valve, a hydraulic actuator and an electric control unit; The oil tank is connected with the power pump and supplies oil to the hydraulic actuator through the power pump; The oil inlet P of the plug-in type integrated mechanical valve is connected with the oil outlet of the power pump, and the oil outlet A of the plug-in type integrated mechanical valve is connected with the hydraulic actuator and is used for providing high-flow oil with adjustable pressure for the hydraulic actuator; The oil inlet of the pressure regulating electromagnetic valve is connected with the oil outlet of the power pump, and the oil outlet of the pressure regulating electromagnetic valve is connected with the plug-in type integrated mechanical valve and is used for regulating the oil pressure of the oil outlet of the plug-in type integrated mechanical valve; The electric control unit is electrically connected with the pressure regulating electromagnetic valve and used for regulating the oil pressure of the oil outlet of the pressure regulating electromagnetic valve.
2. The hydraulic control system according to claim 1, wherein the plug-in integrated mechanical valve comprises a valve housing, a normally closed valve core and a spring, the valve housing is provided with an oil inlet P port and an oil outlet A port, the normally closed valve core is arranged in the valve housing in an axial sliding manner, an oil guide channel used for communicating the oil inlet P port and the oil outlet A port is arranged in the normally closed valve core, the normally closed valve core axially divides the interior of the valve housing into a left cavity and a right cavity, the spring is arranged in the left cavity and used for driving the normally closed valve core to move towards the right cavity so as to disconnect the oil inlet P port and the oil outlet A port, the right cavity is connected with an oil outlet of the pressure regulating electromagnetic valve, and oil at the oil outlet of the pressure regulating electromagnetic valve drives the normally closed valve core to move towards the left cavity so as to enable the oil inlet P port and the oil outlet A port to be mutually communicated through the oil guide channel.
3. The hydraulic control system according to claim 2, wherein the valve housing is further provided with a feedback oil duct, and two ends of the feedback oil duct are respectively communicated with the oil outlet a port and the left cavity.
4. The hydraulic control system according to claim 2, wherein an accumulator for stabilizing the oil pressure is provided between the oil outlet of the pressure regulating solenoid valve and the right chamber.
5. The hydraulic control system according to claim 1, wherein an oil pressure sensor is arranged between the oil outlet a and the hydraulic actuator, and the oil pressure sensor is electrically connected with the electronic control unit.
6. The hydraulic control system of claim 1, wherein a filter for filtering oil is disposed between the oil tank and the power pump.
7. The hydraulic control system according to claim 2, wherein the valve housing is further provided with an oil return port T, the oil return port T is connected with the oil tank, and an oil return channel for communicating the oil return port T with the oil outlet port a is provided in the normally closed valve core.

Description

Hydraulic control system Technical Field The utility model relates to the technical field of hydraulic control, in particular to a hydraulic control system. Background In the actuator control link of the current vehicle hydraulic control system, a scheme of controlling the pressure of a main oil passage by adopting a single electromagnetic valve is quite common. The electromagnetic valve mainly comprises an electromagnetic coil, a valve body, a valve core and the like, and the valve core is driven to act by electromagnetic force, so that the regulation and control on the flow of hydraulic oil are achieved. The hydraulic system has the advantages of simple structure, reliable operation, quick response and the like, and can be widely applied to the hydraulic system. However, this solution has significant limitations. From the physical characteristics, the electromagnetic valve is limited by electromagnetic force and stroke, so that the flow regulating capability of the electromagnetic valve is insufficient. When facing a large flow demand scenario, it is difficult for a single solenoid valve to provide sufficient hydraulic oil in a short time, which directly restricts the output power and response speed of the actuator. Taking a brake system of a heavy vehicle as an example, a large amount of hydraulic oil is required to drive a brake caliper at the moment of vehicle braking, so that a rapid and strong braking effect is realized. However, the existing single electromagnetic valve cannot meet the requirement of large flow in time, so that braking response is delayed, braking distance is increased, and potential threat is formed to driving safety. Moreover, after the executor finishes the pressure relief and oil discharge actions, the system needs to be rapidly filled with oil and build pressure so as to ensure that the executor can be quickly restored to a working state and meet the subsequent operation requirements. However, because of the limitation of the flow of a single electromagnetic valve, the oil filling process takes a long time, and quick pressure building cannot be realized, and the defect can seriously affect the working efficiency of equipment. After each time the executor completes one working cycle, the executor needs to wait for a long time to complete oil filling and pressure building, so that the continuity of the whole operation flow is greatly reduced, and the performance of equipment is greatly restricted. Therefore, a brand new technical scheme is urgently needed to be developed to solve the problem of flow limitation existing in the existing vehicle hydraulic control system for controlling the pressure of a main oil way by a single electromagnetic valve, meet the requirements of large flow and quick oil filling and pressure building, and improve the overall performance of the vehicle hydraulic control system. Disclosure of utility model The application aims to provide a hydraulic control system which has the advantages of solving the problem of flow limitation of the traditional electromagnetic valve and improving the response speed and the pressure regulation precision of the system. The application provides a hydraulic control system which comprises an oil tank, a power pump, a plug-in type integrated mechanical valve, a pressure regulating electromagnetic valve, a hydraulic actuator and an electric control unit, wherein the oil tank is connected with the power pump and supplies oil to the hydraulic actuator through the power pump, an oil inlet P of the plug-in type integrated mechanical valve is connected with an oil outlet of the power pump, an oil outlet A of the plug-in type integrated mechanical valve is connected with the hydraulic actuator and is used for providing high-flow oil with adjustable pressure for the hydraulic actuator, an oil inlet of the pressure regulating electromagnetic valve is connected with an oil outlet of the power pump, an oil outlet of the pressure regulating electromagnetic valve is connected with the plug-in type integrated mechanical valve and is used for regulating the oil pressure of the oil outlet of the plug-in type integrated mechanical valve, and the electric control unit is electrically connected with the pressure regulating electromagnetic valve and is used for regulating the oil pressure of the oil outlet of the pressure regulating electromagnetic valve. Compared with the prior art, the hydraulic control system has the advantages that the power pump provides high-flow oil for the hydraulic actuator, the pressure regulating electromagnetic valve accurately regulates and controls the oil path pressure of the plug-in type integrated mechanical valve, the problem of insufficient flow of the existing single electromagnetic valve is solved, the quick response requirement under a high-flow scene can be met, the electronic control unit is electrically connected with the pressure regulating electromagnetic valve, dynamic regulation of oil pressure is a