Cooling and lubricating flow control valve

Abstract

The present application relates to a kind of cooling lubrication flow control valve, including valve sleeve and valve core, the valve sleeve is equipped with valve cavity, the valve core is arranged in valve cavity, the valve sleeve is also equipped with first oil outlet cavity passage, oil inlet cavity passage and second oil outlet cavity passage with valve cavity being communicated, the valve sleeve is equipped with oil outlet, and the oil outlet is connected with first oil outlet cavity passage, second oil outlet cavity passage, the valve core is equipped with first valve plug and second valve plug, using oil outlet and first oil outlet cavity passage, second oil outlet cavity passage are communicated, the valve core structure with first valve plug and second valve plug is combined to realize that flow control valve can realize small flow supply and large flow supply two kinds of flow distribution mode to gearbox subsystem, simultaneously, by designing first valve plug completely blocks first oil outlet cavity passage, second valve plug completely blocks second oil outlet cavity passage, the oil outlet is in the flow completely closed state, so that cooling lubrication flow control valve has flow completely closed function.

Description

Technical Field

[0001] This invention relates to the field of gearbox hydraulic technology, and more specifically, to a cooling and lubrication flow control valve. Background Technology

[0002] One of the main functions of the hydraulic system of an automatic transmission is to cool and lubricate the transmission subsystems such as the clutch and motor. Existing technology usually uses solenoid valves or spool valves with pilot solenoid valves to control the cooling flow of one or more circuits, thereby achieving overheat protection of the transmission subsystem under some extreme operating conditions, while maintaining the efficient operation of the system when the transmission subsystem does not need to be cooled.

[0003] Currently, the most common cooling flow control valve used in automatic transmission hydraulic systems is a two-position, two-way solenoid valve. It controls the flow of a single channel to distribute the flow of the entire cooling oil circuit. The flow distribution mode is simple and it cannot achieve proportional control of the flow. Summary of the Invention

[0004] The problem solved by this invention is how to make the flow distribution mode of the cooling and lubrication flow control valve not singular, and how to achieve flow ratio control of the cooling and lubrication flow control valve.

[0005] To address the aforementioned problems, this invention provides a cooling and lubrication flow control valve, comprising a valve sleeve and a valve core. The valve sleeve has a valve cavity, and the valve core is disposed within the valve cavity and axially movable along the axis of the valve cavity. The valve sleeve has a signal channel for connecting a pilot solenoid valve to drive the axial movement of the valve core. A spring abuts against the end of the valve core away from the signal channel. The valve sleeve also has a first oil outlet channel, an oil inlet channel, and a second oil outlet channel communicating with the valve cavity. The valve sleeve further has an oil outlet path communicating with the gearbox subsystem, connecting the first and second oil outlet channels. The valve core has a first valve plug and a second valve plug. When there is no signal pressure input to the signal channel, the first valve plug... The first valve plug is partially blocking the first oil outlet passage, while the second valve plug is completely blocking the first oil outlet passage. The oil outlet path outputs a small flow rate of oil. After a signal pressure is input into the signal passage, the valve core overcomes the spring force and moves axially along the valve cavity axis. The oil output from the first oil outlet passage gradually decreases until the first valve plug completely blocks the first oil outlet passage. The second valve plug remains completely blocking the second valve plug. The oil flow rate output from the oil outlet path gradually decreases until there is no oil output. Then, the valve core continues to move, the second valve plug gradually opens the second oil outlet passage, the first valve plug completely blocks the first oil outlet passage, and the oil flow rate output from the oil outlet path gradually increases.

[0006] The beneficial effects of this invention are as follows: by connecting the oil outlet path with the first oil outlet channel and the second oil outlet channel, and combining the valve core structure with the first valve plug and the second valve plug, the flow control valve can realize two flow distribution modes for the gearbox subsystem: small flow supply and large flow supply. At the same time, by designing the first valve plug to completely block the first oil outlet channel and the second valve plug to completely block the second oil outlet channel, the oil outlet path is in a completely closed flow state, so that the cooling and lubrication flow control valve has a completely closed flow function.

[0007] Preferably, a flow channel is provided at the junction of the wall of the second oil outlet passage and the valve cavity. The flow channel is perpendicular to the axis of the valve cavity. When the valve core moves to the right to open the second oil outlet passage, its flow area is the area remaining after removing the covered part of the annulus. The mathematical relationship between this area and the valve core stroke depends on the shape of the wall of the second oil passage. Customized flow ratio control at the second oil outlet passage can be achieved through this mathematical relationship.

[0008] Preferably, the oil inlet channel is located between the first oil outlet channel and the second oil outlet channel. The travel distance A when the end of the first valve plug corresponding to the oil inlet channel moves to the point where the first valve plug completely blocks the first oil outlet channel is A. The travel distance B when the end of the second valve plug corresponding to the oil inlet channel moves to the point where the second valve plug opens the second oil outlet channel is B. A < B, so that the valve core can block the first oil outlet channel and the second oil outlet channel simultaneously through the first valve plug and the second valve plug, thereby realizing the function of completely shutting off the flow of the cooling lubrication flow control valve.

[0009] Preferably, the valve sleeve has an adjustment cavity corresponding to the spring, the spring is located in the adjustment cavity, a stop pin is inserted into the valve sleeve corresponding to the adjustment cavity, one end of the spring abuts against the stop pin, and the end of the valve core that abuts against the spring has a mounting seat, the valve core abuts against the other end of the spring through the mounting seat, so as to prevent the spring from moving in the adjustment cavity.

[0010] Preferably, the oil outlet passage has a three-way structure, including two oil inlet ports and one oil outlet port. The two oil inlet ports of the oil outlet passage are respectively connected to the first oil outlet channel and the second oil outlet channel, and the oil outlet port of the oil outlet passage is connected to the transmission subsystem for oil supply. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the valve sleeve of the present invention;

[0012] Figure 2 This is a cross-sectional view of the structure of the present invention;

[0013] Figure 3 This is a signal flow curve diagram of the cooling and lubrication flow control valve of the present invention.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1. Valve sleeve; 1.1 Valve chamber; 1.2 Signal channel; 1.3 First oil outlet channel; 1.4 Oil inlet channel; 1.5 Second oil outlet channel; 1.6 Oil outlet path; 1.7 Flow channel; 1.8 Adjustment chamber; 2. Valve core; 2.1 First valve plug; 2.2 Second valve plug; 2.3 Mounting seat; 3. Spring; 4. Stop pin. Detailed Implementation

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0017] like Figures 1-2The cooling and lubrication flow control valve shown includes a valve sleeve 1 and a valve core 2. The valve sleeve 1 has a valve cavity 1.1. The valve core 2 is disposed within the valve cavity 1.1 and can move axially along the axis of the valve cavity 1.1. The valve sleeve 1 has a signal channel 1.2 for connecting a pilot solenoid valve to drive the axial movement of the valve core 2. A spring 3 is abutted at the end of the valve core 2 away from the signal channel 1.2. The valve sleeve 1 also has a first oil outlet channel 1.3, an oil inlet channel 1.4, and a second oil outlet channel 1.5 communicating with the valve cavity 1.1. The valve sleeve 1 also has an oil outlet passage 1.6 connected to the gearbox subsystem, and the oil outlet passage 1.6 is a three-way valve. The structure includes an oil outlet 1.6 with two inlet ports and one outlet port. The two inlet ports are connected to the first outlet chamber 1.3 and the second outlet chamber 1.5, respectively. The outlet port is connected to the transmission subsystem for oil supply. The valve core 2 has a first valve plug 2.1 and a second valve plug 2.2. When there is no signal pressure input to the signal chamber 1.2, the first valve plug 2.1 is partially blocking the first outlet chamber 1.3, and the second valve plug 2.2 is completely blocking the first outlet chamber 1.3. The oil outlet 1.6 outputs a small flow of oil. 2. After the input signal pressure is applied, the valve core 2 overcomes the force of the spring 3 and moves axially along the axis of the valve cavity 1.1. The oil output from the first oil outlet passage 1.3 gradually decreases until the first valve plug 2.1 completely blocks the first oil outlet passage 1.3, while the second valve plug 2.2 remains completely blocked. The oil flow rate output from the oil outlet path 1.6 gradually decreases until there is no oil output. Then, the valve core 2 continues to move, the second valve plug 2.2 gradually opens the second oil outlet passage 1.5, the first valve plug 2.1 completely blocks the first oil outlet passage 1.3, and the oil flow rate output from the oil outlet path 1.6 gradually increases. The oil inlet channel 1.4 is located between the first oil outlet channel 1.3 and the second oil outlet channel 1.5. The travel distance A when the first valve plug 2.1 moves from the end of the oil inlet channel 1.4 to completely block the first oil outlet channel 1.3 is the first valve plug 2.1. The travel distance B when the second valve plug 2.2 moves from the end of the oil inlet channel 1.4 to open the second oil outlet channel 1.5 is the second valve plug 2.2. A < B, so that the valve core 2 can simultaneously block the first oil outlet channel 1.3 and the second oil outlet channel 1.5 through the first valve plug 2.1 and the second valve plug 2.2, thereby realizing the function of completely shutting off the flow of the cooling and lubrication flow control valve.

[0018] In addition, to achieve the complete shut-off function of the cooling lubrication flow control valve, a flow channel 1.7 is provided at the junction of the second oil outlet passage 1.5 and the valve chamber 1.1. The flow channel 1.7 is perpendicular to the axis of the valve chamber 1.1, realizing the flow ratio control at the second oil outlet passage 1.5. When the valve core 2 moves to the right to open the second oil outlet passage 1.5, its flow area is the area remaining of the valve chamber 1.1 after removing the covered part. This area makes the mathematical relationship of the valve core 2 stroke dependent on the shape of the cavity wall of the second oil passage. Through this mathematical relationship, customized flow ratio control at the second oil outlet passage 1.5 can be achieved. The mathematical relationship of flow ratio control in this specific embodiment is prior art and will not be elaborated here. The flow channel 1.7 in this specific embodiment is U-shaped, which can achieve the following: Figure 3 An approximately linear curve of flow rate between 7 bar and 9 bar.

[0019] Furthermore, the valve sleeve 1 is provided with an adjustment cavity 1.8 corresponding to the spring 3, and the spring 3 is located in the adjustment cavity 1.8. A stop pin 4 is inserted into the valve sleeve 1 corresponding to the adjustment cavity 1.8. One end of the spring 3 abuts against the stop pin 4. The end of the valve core 2 that abuts against the spring 3 is provided with a mounting seat 2.3. The valve core 2 abuts against the other end of the spring 3 through the mounting seat 2.3 to prevent the spring 3 from moving within the adjustment cavity 1.8.

[0020] Furthermore, the valve core sealing the signal cavity and the first oil outlet cavity through the first valve plug, and the valve core sealing the second oil outlet cavity and the regulating cavity through the second valve plug, are existing technologies and will not be elaborated upon here.

[0021] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A cooling and lubrication flow control valve, comprising a valve sleeve (1) and a valve core (2), characterized in that, The valve sleeve (1) has a valve cavity (1.1), and the valve core (2) is located in the valve cavity (1.1) and can move axially along the axis of the valve cavity (1.1). The valve sleeve (1) has a signal channel (1.2) for connecting a pilot solenoid valve to drive the valve core (2) to move axially. A spring (3) is abutted at the end of the valve core (2) away from the signal channel (1.2). The valve sleeve (1) also has a first oil outlet channel (1.3) and an oil inlet channel (1.4) communicating with the valve cavity (1.1). The valve sleeve (1) is also provided with an oil outlet passage (1.6) connected to the gearbox subsystem. The oil outlet passage (1.6) is connected to the first oil outlet passage (1.3) and the second oil outlet passage (1.5). The valve core (2) is provided with a first valve plug (2.1) and a second valve plug (2.2). When there is no signal pressure input in the signal passage (1.2) The first valve plug (2.1) is in a state of partially blocking the first oil outlet passage (1.3), and the second valve plug (2.2) is in a state of completely blocking the second oil outlet passage (1.5); the oil outlet passage (1.6) outputs a small flow of oil; after the signal pressure is input into the signal passage (1.2), the valve core (2) overcomes the force of the spring (3) and moves axially along the axis of the valve cavity (1.1), and the oil output of the first oil outlet passage (1.3) gradually decreases until the first valve plug (2.1) is completely blocked. 1) The first oil outlet passage (1.3) is completely blocked, and the second valve plug (2.2) is still in the state of completely blocking the second oil outlet passage (1.5). The oil flow rate output by the oil outlet passage (1.6) gradually decreases until there is no oil output. Then the valve core (2) continues to move, and the second valve plug (2.2) gradually opens the second oil outlet passage (1.5). The first valve plug (2.1) completely blocks the first oil outlet passage (1.3), and the oil flow rate output by the oil outlet passage (1.6) gradually increases. A flow channel (1.7) is provided at the point where the wall of the second oil outlet cavity (1.5) communicates with the valve cavity (1.1). The flow channel (1.7) is perpendicular to the axis of the valve cavity (1.1) and is U-shaped.

2. The cooling and lubrication flow control valve according to claim 1, characterized in that, The travel distance of the first valve plug (2.1) at the end of the oil inlet channel (1.4) when it moves to the point where the first valve plug (2.1) completely blocks the first oil outlet channel (1.3) is A, and the formation distance of the second valve plug (2.2) at the end of the oil inlet channel (1.4) when it moves to the point where the second valve plug (2.2) opens the second oil outlet channel (1.5) is B, where A < B.

3. A cooling and lubrication flow control valve according to claim 2, characterized in that, The valve sleeve (1) is provided with an adjustment cavity (1.8) corresponding to the spring (3). The spring (3) is located in the adjustment cavity (1.8). A stop pin (4) is inserted into the valve sleeve (1) corresponding to the adjustment cavity (1.8). One end of the spring (3) abuts against the stop pin (4). The end of the valve core (2) that abuts against the spring (3) is provided with a mounting seat (2.3). The valve core (2) abuts against the other end of the spring (3) through the mounting seat (2.3).

4. A cooling and lubrication flow control valve according to claim 3, characterized in that, The oil outlet passage (1.6) has a three-way structure. The oil outlet passage (1.6) includes two oil inlet ports and one oil outlet port. The two oil inlet ports of the oil outlet passage (1.6) are respectively connected to the first oil outlet channel (1.3) and the second oil outlet channel (1.5). The oil outlet port of the oil outlet passage (1.6) is connected to the gearbox subsystem for oil supply.

Images