Electrical circuit capable of rapidly identifying power supply fault of valve group

Abstract

The utility model relates to an electrical circuit capable of rapidly identifying a power supply fault of a valve group, which comprises a power supply fuse, a gear shifting valve group, a relay and a light emitting diode, and the power supply fuse is connected in series with the gear shifting valve group; one end of a coil of the relay is electrically connected between the power supply fuse and the gear shifting valve group, the other end of the coil of the relay is grounded, and the light emitting diode is connected with a contact of the relay in series. According to the electrical circuit capable of rapidly identifying the power supply fault of the valve group, the relay and the light-emitting diode are used for detecting whether the power supply fuse is disconnected, the reason of the power supply fault of the valve group can be preliminarily judged without any instrument, and whether the power supply fuse is disconnected can be judged only by observing whether the light-emitting diode is on or off with eyes; time is saved, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of electronic circuits, and particularly relates to an electrical circuit for quickly identifying power supply faults of a valve group. Background Art

[0002] With the strong promotion of agricultural mechanization, the acceleration of land transfer and the influence of subsidy policies, high-end large-horsepower tractor products are the first choice for reclamation areas, production and construction corps, large cooperatives, etc. The market demand for high-end large-horsepower tractors is an opportunity for the development of enterprises, with an urgent time requirement. To expand the market and enhance product competitiveness, the P5000 platform needs to develop high-end products with power shift + power reverse. To meet market demand, based on the P5000P1 heavy model, a new power high-low + power reverse transmission module is developed, and at the same time, a new Weichai WP7H National IV engine is newly matched to complete product upgrading. The route of the power high-low + reverse model is to upgrade some transmission shifts to electrical control + solenoid valve shifts, so the power supply of the valve group is an important condition. However, power supply abnormalities of "high gear valve / low gear valve / reverse gear valve / PTO switch valve / PTO proportional valve" often occur in the power supply of the valve group.

[0003] When power supply abnormalities occur in multiple valve groups of the whole vehicle, it will cause the whole vehicle to be unable to shift gears, and the power shift function of the whole vehicle will be lost. Engineers need to analyze the reasons for the power supply abnormalities of the valve group: whether the controller program is flashed normally, whether the principle of the cab wiring harness is correct, whether the principle design of the transmission wiring harness is correct, whether the power supply fuse has an open circuit fault, etc. Engineers need to measure each item with the help of an instrument computer or a multimeter, which is time-consuming and troublesome. Summary of the Utility Model

[0004] The utility model provides an electrical circuit for quickly identifying power supply faults of a valve group, which can quickly eliminate whether the power supply faults of the valve group are caused by the fuse blowing of the valve group power supply.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: an electrical circuit for quickly identifying power supply faults of a valve group, including a power supply fuse, a shift valve group, a relay, and a light-emitting diode; the power supply fuse is connected in series with the shift valve group; one end of the coil of the relay is electrically connected between the power supply fuse and the shift valve group, the other end of the coil of the relay is grounded, and the light-emitting diode is connected in series with the contact of the relay.

[0006] On the basis of the above technical solution, the utility model can also be improved as follows.

[0007] Further, both the power supply fuse and the shift valve group include a first end and a second end. The first end of the power supply fuse is used to access the power supply, and the second end of the power supply fuse is electrically connected to the first end of the shift valve group.

[0008] Further, one end of the coil of the relay is electrically connected between the second end of the power supply fuse and the first end of the shift valve group, the other end of the coil of the relay is grounded, one end of the contact of the relay is electrically connected to the first end of the power supply fuse, the other end of the contact of the relay is electrically connected to one end of the light-emitting diode, and the other end of the light-emitting diode is grounded.

[0009] Further, the electrical circuit further includes a VCU, and the VCU is electrically connected to the second end of the shift valve group.

[0010] Further, the power supply fuse is specifically a fast-blowing power supply fuse.

[0011] Further, the relay is specifically a normally closed relay, and the light-emitting diode is connected in series with the normally closed contact of the normally closed relay.

[0012] Further, the relay is specifically a normally open relay, and the light-emitting diode is connected in series with the normally open contact of the normally open relay.

[0013] Further, both the light-emitting diode and the power supply fuse are arranged in the fuse box.

[0014] Further, the shift valve group is specifically a solenoid valve arranged on the vehicle and used for providing shifting for the vehicle.

[0015] Further, the solenoid valve is specifically a high gear solenoid valve or a low gear solenoid valve or a reverse gear solenoid valve or a PTO switch solenoid valve or a PTO proportional solenoid valve.

[0016] The beneficial effects of the present utility model are as follows: The electrical circuit for quickly identifying the power supply fault of the valve group of the present utility model detects whether the power supply fuse is open through a relay and a light-emitting diode. Under the condition of having no instruments, the cause of the valve group power supply fault problem can be initially judged. It only needs to observe whether the light-emitting diode "lights" or "does not light" with the eyes to judge whether the power supply fuse is open, which saves time and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic circuit diagram of the electrical circuit for quickly identifying the power supply fault of the valve group of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0019] As Figure 1As shown in the figure, an electrical circuit for quickly identifying a power supply fault of a valve group includes a power supply fuse F, a shift valve group P1, a relay P2, and a light-emitting diode LED. The power supply fuse F is connected in series with the shift valve group P1. One end of the coil of the relay P2 is electrically connected between the power supply fuse F and the shift valve group P1, the other end of the coil of the relay P2 is grounded, and the light-emitting diode LED is connected in series with the contact of the relay P2.

[0020] Specifically, both the power supply fuse F and the shift valve group P1 include a first end and a second end. The first end of the power supply fuse F is used to connect to a power source, and the second end of the power supply fuse F is electrically connected to the first end of the shift valve group P1. One end of the coil of the relay P2 is electrically connected between the second end of the power supply fuse F and the first end of the shift valve group P1, the other end of the coil of the relay P2 is grounded, one end of the contact of the relay P2 is electrically connected to the first end of the power supply fuse F, the other end of the contact of the relay P2 is electrically connected to one end of the light-emitting diode LED, and the other end of the light-emitting diode LED is grounded.

[0021] In this embodiment, the power supply fuse F is specifically a fast power supply fuse. The light-emitting diode LED and the power supply fuse F are both arranged in a fuse box.

[0022] In this embodiment, the shift valve group P1 is specifically a solenoid valve arranged on a vehicle and used to provide shifting for the vehicle. The solenoid valve is specifically a high gear solenoid valve or a low gear solenoid valve or a reverse gear solenoid valve or a PTO switch solenoid valve or a PTO proportional solenoid valve.

[0023] In this embodiment, the electrical circuit further includes a VCU. The VCU is electrically connected to the second end of the shift valve group P1, and the VCU provides the required ground for the second end of the shift valve group P1.

[0024] In this embodiment, the relay P2 is specifically a normally closed relay, and the light-emitting diode LED is connected in series with the normally closed contact of the normally closed relay.

[0025] When the power supply fuse F of the shift valve group P1 is not open, the energization of the coil of the relay P2 will generate a potential difference. According to the specific principle of the relay, the normally closed contact of the relay P2 will change from the originally closed state to the open state at this time. Therefore, the light-emitting diode LED is not lit at this time; conversely, when the power supply fuse F of the shift valve group P1 is open, the coil of the relay P2 does not generate a potential difference. According to the specific principle of the relay, the normally closed contact of the relay P2 will maintain the originally closed state at this time. Therefore, the light-emitting diode LED is lit at this time. So through the optimized wiring principle, when the power supply failure of the shift valve group P1 occurs again, it is possible to directly determine whether the abnormal power supply is caused by the open circuit of its power supply fuse F by observing whether the light-emitting diode LED is constantly lit. That is: when the light-emitting diode LED is constantly lit, it indicates that the power supply fuse F of the shift valve group P1 is blown, and the power supply fuse F can be directly replaced; when the light-emitting diode LED is not lit, it indicates that the power supply fuse F is normal, and the lines of the remaining branch segments or the shift valve group P1 itself can be further checked for abnormalities. In this way, the cause of the abnormal power supply of the shift valve group can be initially judged without instruments, saving time for engineers and increasing work efficiency.

[0026] In other embodiments, the relay P2 is specifically a normally open relay, and the light-emitting diode LED is connected in series with the normally open contact of the normally open relay.

[0027] When the power supply fuse F of the shift valve group P1 is not open, the energization of the coil of the relay P2 will generate a potential difference. According to the specific principle of the relay, the normally open contact of the relay P2 will change from the originally open state to the closed state at this time. Therefore, the light-emitting diode LED is lit at this time; conversely, when the power supply fuse F of the shift valve group P1 is open, the coil of the relay P2 does not generate a potential difference. According to the specific principle of the relay, the normally open contact of the relay P2 will maintain the originally open state at this time. Therefore, the light-emitting diode LED is not lit at this time. So through the optimized wiring principle, when the power supply failure of the shift valve group P1 occurs again, it is possible to directly determine whether the abnormal power supply is caused by the open circuit of its power supply fuse F by observing whether the light-emitting diode LED is constantly lit. That is: when the light-emitting diode LED is not lit, it indicates that the power supply fuse F is blown, and the power supply fuse F can be directly replaced; when the light-emitting diode LED is constantly lit, it indicates that the power supply fuse F of the shift valve group P1 is normal, and the lines of the remaining branch segments or the shift valve group P1 itself can be further checked for abnormalities. In this way, the cause of the abnormal power supply of the shift valve group can be initially judged without instruments, saving time for engineers and increasing work efficiency.

[0028] In the prior art, the shifting method of the power shift model of high-end large-horsepower tractors is electro-hydraulic combination. Therefore, the solenoid valve is crucial during the operation and work of the whole machine. When the solenoid valve suddenly fails, it is very cumbersome to troubleshoot the fault with the existing technology, and few farmers carry professional instruments such as multimeters and computers with them when working in the fields. Therefore, it becomes very important to preliminarily judge the cause of the problem before the farmer asks the professional engineer of the service station to repair it. Therefore, the present utility model can preliminarily judge the cause of the valve group power supply fault under the condition that the user has no instruments - only need to observe whether the fault lamp is "on" or "off" with the eyes. It saves time for engineers or farmers and improves work efficiency.

[0029] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electrical circuit for quickly identifying the power supply failure of a valve group, characterized in that: It includes a power supply fuse, a shift valve group, a relay, and a light-emitting diode; the power supply fuse is connected in series with the shift valve group; one end of the coil of the relay is electrically connected between the power supply fuse and the shift valve group, the other end of the coil of the relay is grounded, and the light-emitting diode is connected in series with the contact of the relay.

2. The electrical circuit for quickly identifying a power supply fault of a valve group according to claim 1, characterized in that: Both the power supply fuse and the shift valve group include a first end and a second end. The first end of the power supply fuse is used to access the power supply, and the second end of the power supply fuse is electrically connected to the first end of the shift valve group.

3. The electrical circuit for quickly identifying the power supply failure of the valve group according to claim 2, characterized in that: One end of the coil of the relay is electrically connected between the second end of the power supply fuse and the first end of the shift valve group, the other end of the coil of the relay is grounded, one end of the contact of the relay is electrically connected to the first end of the power supply fuse, the other end of the contact of the relay is electrically connected to one end of the light-emitting diode, and the other end of the light-emitting diode is grounded.

4. The electrical circuit for quickly identifying a power supply failure of a valve group according to claim 2, characterized in that: The electrical circuit further includes a VCU, and the VCU is electrically connected to the second end of the shift valve group.

5. The electrical circuit for quickly identifying the power supply failure of the valve group according to claim 1, characterized in that: The power supply fuse is specifically a power supply fast-blow fuse.

6. The electrical circuit for quickly identifying the power supply failure of the valve group according to claim 1, characterized in that: The relay is specifically a normally closed relay, and the light-emitting diode is connected in series with the normally closed contact of the normally closed relay.

7. The electrical circuit for quickly identifying the power supply failure of the valve group according to claim 1, wherein: The relay is specifically a normally open relay, and the light-emitting diode is connected in series with the normally open contact of the normally open relay.

8. The electrical circuit for quickly identifying the power supply failure of the valve group according to claim 1, characterized in that: Both the light-emitting diode and the power supply fuse are arranged in the fuse box.

9. The electrical circuit for quickly identifying the power supply fault of the valve group according to claim 1, characterized in that: The shift valve group is specifically a solenoid valve arranged on the vehicle and used to provide shifting for the vehicle.

10. The electrical circuit for quickly identifying a power supply fault of a valve group according to claim 9, characterized in that: The solenoid valve is specifically a high gear solenoid valve or a low gear solenoid valve or a reverse gear solenoid valve or a PTO switch solenoid valve or a PTO proportional solenoid valve.

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