Intelligent oil changer for automatic transmission

Abstract

The present invention discloses an intelligent oil changer for an automatic transmission gearbox, comprising a first branch oil circuit and a second branch oil circuit respectively connected to the automatic transmission gearbox, a three-position four-way solenoid valve whose two inlets and outlets are connected to the first branch oil circuit and the second branch oil circuit, an oil inlet pipe and an oil return pipe respectively connected to the other two inlets and outlets of the three-position four-way solenoid valve, a new oil tank connected to the oil inlet pipe, and an old oil tank connected to the oil return pipe. By adopting the present invention, the oil of the vehicle gearbox can be changed when the pressure of the old oil in the vehicle gearbox is above 0 pressure, and the low-pressure gearbox can be easily changed. The device is applicable to a wide range of vehicles; two oil circuits are adopted to ensure that the old oil is led out and the new oil is injected independently and not mixed, thereby improving the oil quality of the gearbox after the oil change and extending the service life of the gearbox; the equipment is provided with an electronic control part, and intelligent operation guidance is carried out through a computer control panel, and a database of all vehicle models is used to realize a one-button intelligent oil change mode, and new operators can also use it without any barriers.

Description

Technical Field

[0001] The invention relates to an intelligent oil changing machine for an automatic transmission gearbox. Background Art

[0002] In 2016, the number of motor vehicles in my country will be about 295 million, with an average of 4.66 people owning a car. With the increasing number of automatic transmission vehicles in China, people's awareness of the maintenance of automatic transmission gearboxes has been continuously enhanced. According to the maintenance regulations of automatic transmission gearboxes, after a car has traveled 50,000-60,000 kilometers, the transmission oil will deteriorate and need to be replaced. If the transmission oil is not replaced in time, it will cause abnormal operation of the transmission. Due to the special structure of the automatic transmission, the traditional oil change method cannot completely discharge the original old oil. The manual filling of the transmission oil cannot accurately control the filling amount. If the transmission oil is filled too much or too little, it will cause the transmission to be damaged. The problems and shortcomings of the transmission oil changer on the market are as follows: 1. The low-pressure transmission of the vehicle cannot be changed. About 15%-25% of the vehicles in the society cannot be changed by the oil changer, which brings inconvenience to users. 2. The problem of mixing new and old oil in the oil changer. When using an oil changer to change the oil in a vehicle's gearbox, the new and old oils must be dynamically exchanged in equal amounts through the oil changer's oil circuit mechanical identifier at the same time. Impurities in the old oil will inevitably adhere to the oil circuit identifier valve steel ball and the valve body sphere, causing the oil circuit identifier valve to be loosely sealed, resulting in the new oil mixing in the mechanical identifier. In addition, when changing the oil in the gearbox, the gear position must be constantly changed and the throttle must be stepped on. The pressure of the old oil in the gearbox is constantly changing, increasing the mixing ratio of the new and old oils. The mixing rate even reaches 25%-40%, resulting in no obvious improvement in the quality of the gearbox after the oil change. The oil change amount must be increased, resulting in a waste of resources and unnecessary economic burdens for the car owner. 3. The product is far from intelligent. New operators cannot operate without obstacles without any basic knowledge, and the operation process is cumbersome and inefficient. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent oil changer for an automatic transmission which can change oil thoroughly, save oil change amount and have high operating efficiency.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] An automatic transmission intelligent oil changer comprises a first branch oil circuit and a second branch oil circuit respectively connected to the automatic transmission, a three-position four-way solenoid valve having two inlets and outlets connected to the first branch oil circuit and the second branch oil circuit, an oil inlet pipe and an oil return pipe respectively connected to the other two inlets and outlets of the three-position four-way solenoid valve, a new oil tank connected to the oil inlet pipe, and an old oil tank connected to the oil return pipe;

[0006] The first branch oil circuit is connected to the first oil inlet and outlet of the automatic transmission through a first quick connector, and the second branch oil circuit is connected to the second oil inlet and outlet of the automatic transmission through a second quick connector;

[0007] The first branch oil circuit is provided with a first liquid flow switch, and the second branch oil circuit is provided with a second liquid flow switch;

[0008] An oil pump is arranged on the oil inlet pipe.

[0009] As a further improvement of the present invention, the three-position four-way solenoid valve includes a valve body and four inlets and outlets arranged on the valve body; the four inlets and outlets are respectively inlet and outlet A connected to the first branch oil circuit, inlet and outlet B connected to the second branch oil circuit, inlet and outlet P connected to the oil inlet pipe, and inlet and outlet D connected to the oil return pipe.

[0010] As a further improvement of the present invention, it also includes an electric control part;

[0011] The electric control part includes a computer control panel, an electromagnetic coil a and an electromagnetic coil b for controlling the position of the valve core of a three-position four-way electromagnetic valve, a first signal transmission line, a second signal transmission line, a first current wire and a second current wire;

[0012] The first signal transmission line electrically connects the first liquid flow switch and the computer control board, the second signal transmission line electrically connects the second liquid flow switch and the computer control board, the first current wire electrically connects the electromagnetic coil a and the computer control board, and the second current wire electrically connects the electromagnetic coil b and the computer control board.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0014] By adopting the present invention, the vehicle gearbox oil can be changed when the old oil pressure of the vehicle gearbox is above 0 pressure, ending the history of low-pressure gearboxes being unable to change oil. The device can be used in a wide range of vehicles; two oil circuits are adopted to ensure that the old oil introduction and the new oil injection are independent of each other and do not mix, thereby improving the oil quality after the gearbox oil change, reducing the oil change cost, and extending the service life of the gearbox; the equipment is provided with an electronic control part, and intelligent operation guidance is performed through a computer control panel, and a database of all vehicle models is used to realize a one-click intelligent oil change mode, and new operators can also use it without any barriers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a working principle diagram of the gearbox state 1 of the present invention;

[0016] Attached Figure 2 It is a working principle diagram of the gearbox state 2 of the present invention.

[0017] In the attached drawings: 1 automatic transmission gearbox, 2 first oil inlet and outlet, 3 second oil inlet and outlet, 4 first quick connector, 5 second quick connector, 6 first fluid flow switch, 7 second fluid flow switch, 8 first signal transmission line, 9 second signal transmission line, 10 three-position four-way solenoid valve, 11 solenoid coil a, 12 solenoid coil b, 13 first current wire, 14 second current wire, 15 oil pump, 16 oil inlet pipe, 17 oil return pipe, 18 new oil tank, 19 old oil tank, 20 computer control board. DETAILED DESCRIPTION

[0018] The present invention is described in further detail below with reference to the accompanying drawings.

[0019] As attached Figure 1 and 2 As shown, an automatic transmission intelligent oil changer comprises a first branch oil circuit and a second branch oil circuit respectively connected to an automatic transmission 1, a three-position four-way solenoid valve 10 whose two inlets and outlets are connected to the first branch oil circuit and the second branch oil circuit, an oil inlet pipe 16 and an oil return pipe 17 respectively connected to the other two inlets and outlets of the three-position four-way solenoid valve 10, a new oil tank 18 connected to the oil inlet pipe 16, and an old oil tank 19 connected to the oil return pipe 17; the first branch oil circuit is connected to the first oil inlet and outlet 2 of the automatic transmission 1 through a first quick connector 4, and the second branch oil circuit is connected to the second oil inlet and outlet 3 of the automatic transmission 1 through a second quick connector 5; a first liquid flow switch 6 is provided on the first branch oil circuit, and a second liquid flow switch 7 is provided on the second branch oil circuit; an oil pump 15 is provided on the oil inlet pipe 16. The three-position four-way solenoid valve 10 includes a valve body and four inlets and outlets arranged on the valve body; the four inlets and outlets are respectively an inlet and outlet A connected to the first branch oil circuit, an inlet and outlet B connected to the second branch oil circuit, an inlet and outlet P connected to the oil inlet pipe 16, and an inlet and outlet D connected to the oil return pipe 17. It also includes an electric control part; the electric control part includes a computer control board 20, an electromagnetic coil a11 and an electromagnetic coil b12 for controlling the valve core position of the three-position four-way solenoid valve 10, a first signal transmission line 8, a second signal transmission line 9, a first current wire 13 and a second current wire 14; the first signal transmission line 8 electrically connects the first liquid flow switch 6 with the computer control board 20, the second signal transmission line 9 electrically connects the second liquid flow switch 7 with the computer control board 20, the first current wire 13 electrically connects the electromagnetic coil a11 with the computer control board 20, and the second current wire 14 electrically connects the electromagnetic coil b12 with the computer control board 20. The computer control board 20 can adopt common single-chip microcomputer or computer chip, and those skilled in the art can directly select it according to routine work, such as adopting STM32 series single-chip microcomputer with serial number STM32F303RBT6.

[0020] The first liquid flow switch 6 and the second liquid flow switch 7 are liquid flow switches, which can monitor the liquid flow in the corresponding pipeline in real time, monitor the oil flow rate in the pipeline, monitor the flow interruption or prevent the oil pump 15 from idling, and detect the liquid flow direction and flow value in the pipeline and transmit them to the computer control board through the first signal transmission line 8 and the second signal transmission line 9 respectively; when the first liquid flow switch 6 and the second liquid flow switch 7 detect that there is no liquid flow in the first branch oil circuit and the second branch oil circuit, the first current wire 13 and the second current wire 14 are not energized, the valve core of the three-position four-way solenoid valve 10 is in a closed state, and the oil pump 15 is shut down; as shown in the attached Figure 2 As shown, when the first flow switch 6 detects that the old oil in the automatic transmission gearbox 1 flows out from the first oil inlet and outlet 2 to the inlet and outlet A, the computer control board 20 connects the second current wire 14, and the electromagnetic coil b12 controls the valve core of the three-position four-way electromagnetic valve 10 to move, and the inlet and outlet A is connected with the inlet and outlet D, and the inlet and outlet B is connected with the inlet and outlet P. At this time, the oil pump 15 is started, and the old oil in the automatic transmission gearbox 1 flows into the old oil tank 19 through the first oil inlet and outlet 2, the first branch oil circuit, the inlet and outlet A, the inlet and outlet D and the return oil pipe 17 in sequence. At the same time, the new oil in the new oil tank 18 is injected into the automatic transmission gearbox 1 through the oil pump 15, the inlet and outlet P, the inlet and outlet B, the second branch oil circuit and the second oil inlet and outlet 3 in sequence. In the above oil changing process, the pressure of the two branch oil circuits is balanced, and a dynamic equal exchange is performed. The injection of new oil and the discharge of old oil are independent of each other, and the new and old oils are not mixed, and the exchange is complete; as shown in the attached figure Figure 1 As shown, when the old oil in the automatic transmission gearbox 1 flows out from the second oil inlet and outlet 3 to the inlet and outlet B state, its specific process is the same as the working principle of the old oil in the automatic transmission gearbox 1 flowing out from the first oil inlet and outlet 2 to the inlet and outlet A state, and will not be repeated here.

[0021] By adopting the present invention, the vehicle gearbox oil can be changed when the old oil pressure of the vehicle gearbox is above 0 pressure, ending the history of low-pressure gearboxes being unable to change oil. The device can be used in a wide range of vehicles; two oil circuits are adopted to ensure that the old oil extraction and the new oil injection are independent of each other and do not mix, thereby improving the oil quality after the gearbox oil change, saving oil change costs, and extending the service life of the gearbox; the equipment is provided with an electronic control part, which performs intelligent operation guidance through a computer control panel and a database of all vehicle models to achieve a one-button intelligent oil change mode, and new operators can also use it without any barriers.

[0022] The above-described embodiments are only preferred embodiments of the present invention, and are not exhaustive of the feasible implementations of the present invention. For those skilled in the art, any obvious changes made thereto without departing from the principles and spirit of the present invention should be considered to be included in the scope of protection of the claims of the present invention.

Claims

1. An intelligent oil changer for automatic transmission. Features: It comprises a first branch oil circuit and a second branch oil circuit respectively connected to an automatic transmission gearbox (1), a three-position four-way solenoid valve (10) having two inlets and outlets connected to the first branch oil circuit and the second branch oil circuit, an oil inlet pipe (16) and an oil return pipe (17) respectively connected to the other two inlets and outlets of the three-position four-way solenoid valve (10), a new oil tank (18) connected to the oil inlet pipe (16), and an old oil tank (19) connected to the oil return pipe (17); The first branch oil circuit is connected to the first oil inlet and outlet (2) of the automatic transmission gearbox (1) via a first quick connector (4), and the second branch oil circuit is connected to the second oil inlet and outlet (3) of the automatic transmission gearbox (1) via a second quick connector (5); The first branch oil circuit is provided with a first liquid flow switch (6), and the second branch oil circuit is provided with a second liquid flow switch (7); The oil inlet pipe (16) is provided with an oil pump (15); It also includes an electric control part, which includes a computer control panel (20), an electromagnetic coil a (11) and an electromagnetic coil b (12) for controlling the valve core position of a three-position four-way electromagnetic valve (10), a first signal transmission line (8), a second signal transmission line (9), a first current conductor (13) and a second current conductor (14); The first signal transmission line (8) is electrically connected to the first liquid flow switch (6) and the computer control board (20), the second signal transmission line (9) is electrically connected to the second liquid flow switch (7) and the computer control board (20), the first current conductor (13) is electrically connected to the electromagnetic coil a (11) and the computer control board (20), and the second current conductor (14) is electrically connected to the electromagnetic coil b (12) and the computer control board (20); The computer control board (20) is connected to control the oil pump (15).

2. The automatic transmission intelligent oil changer according to claim 1, Features: The three-position four-way solenoid valve (10) comprises a valve body and four inlets and outlets arranged on the valve body; the four inlets and outlets are respectively an inlet and outlet A connected to the first branch oil circuit, an inlet and outlet B connected to the second branch oil circuit, an inlet and outlet P connected to the oil inlet pipe (16), and an inlet and outlet D connected to the oil return pipe (17).

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