Loader starting circuit and system

Abstract

The utility model discloses a loader starting circuit and system, a starting signal flows from a key switch to a control end of a first relay and a control end of a second relay, and then flows to an ECU, the ECU receives the signal, internal coils of the first relay and the second relay are electrified to control an internal switch to be closed, and the starting signal flows to the control end of the first relay and the control end of the second relay. When the vehicle is started, the first relay switch L1 and the second relay switch L2 are closed, and a current signal flows to the controlled end of the first relay from the storage battery, passes through the controlled end of the second relay and finally flows to the starter to control the vehicle to start. And when the control end of one relay is out of control and is continuously closed, the starter stops working by closing the other relay. Based on the loader starting circuit and system provided by the utility model, if a certain relay is damaged and an adhesion controlled end is continuously closed, the other relay can be controlled to be switched off by switching off the key switch so as to close the vehicle, and the risk that the vehicle cannot be closed due to failure of a single relay can be solved.

Description

Technical Field

[0001] This utility model relates to the field of loader technology, and in particular to a loader starting circuit and system. Background Technology

[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.

[0003] Traditional loader starting circuits generally use a single relay control architecture, which controls only one relay to start the vehicle. When the key switch is turned to the start position, the ECU receives a signal and the relay control terminal is turned on. The internal coil of the relay is energized to control the internal switch to close, and the battery current reaches the starter motor through the controlled terminal of the relay, thereby controlling the vehicle to start.

[0004] In the process of realizing this disclosure, the inventors discovered the following technical problems in the prior art: when the relay is subjected to mechanical impact causing the contacts to sinter and stick together, or when the coil circuit experiences insulation failure, the relay will no longer be controlled by the key switch, and the vehicle will remain in the running state, causing the engine to be unable to shut off normally, which poses a serious safety hazard. Utility Model Content

[0005] To address the shortcomings of existing technologies, this disclosure provides a loader starting circuit and system that uses dual relays. When one relay experiences a contact sticking fault and the controlled terminal remains closed, the other relay can still perform normal on / off control functions, thereby effectively eliminating the risk of single-point failure.

[0006] This utility model embodiment provides a loader starting circuit, including: a key switch, a first relay, a second relay, an ECU, a battery, and a starter motor;

[0007] The first relay includes a control terminal and a controlled terminal, and the second relay includes a control terminal and a controlled terminal;

[0008] The key switch, the control terminal of the first relay, the control terminal of the second relay, and the ECU constitute a control circuit; the key switch is connected to the input terminal A1 of the control terminal of the first relay, and the key switch is connected to the input terminal A2 of the control terminal of the second relay; the output terminal C1 of the control terminal of the first relay is connected to the ECU, and the output terminal C2 of the control terminal of the second relay is connected to the ECU.

[0009] The battery, the controlled terminal of the first relay, the controlled terminal of the second relay, and the starter motor constitute a controlled circuit; the battery is connected to the input terminal B1 of the controlled terminal of the first relay, the output terminal E1 of the controlled terminal of the first relay is connected to the input terminal B2 of the controlled terminal of the second relay, and the output terminal E2 of the controlled terminal of the second relay is connected to the starter motor.

[0010] Optionally, in the control circuit, when the key switch is turned to the start position, the start signal flows from the key switch output terminal A to the input terminal A1 of the control terminal of the first relay and the input terminal A2 of the control terminal of the second relay, and then flows out through the output terminal C1 of the control terminal of the first relay and the output terminal C2 of the control terminal of the second relay, and simultaneously flows to the input terminal C of the ECU. The ECU receives the signal, and the internal coils of the first relay and the second relay are energized to control the internal switches to close, and the switches L1 of the first relay and L2 of the second relay are closed.

[0011] Optionally, when the switches L1 and L2 of the first and second relays are closed, in the controlled circuit, the current signal flows from the output terminal B of the battery to the input terminal B1 of the controlled terminal of the first relay, through the first relay switch L1 and the output terminal E1 of the first relay, to the input terminal B2 of the controlled terminal of the second relay, through the second relay switch L2 and the output terminal E2 of the second relay, and finally to the starter motor to control the vehicle to start.

[0012] Optionally, when the control terminal of the first relay malfunctions, causing the first relay switch L1 to remain closed, the key switch is closed, no current flows through the control terminal of the second relay, the switch L2 of the second relay is opened, and the starter stops working.

[0013] Optionally, when the control terminal of the second relay malfunctions, causing the second relay switch L2 to remain closed, the key switch is closed, no current flows through the control terminal of the first relay, the switch L1 of the first relay is opened, and the starter stops working.

[0014] Optionally, the key switch is connected in parallel with the control terminal of the first relay and the control terminal of the second relay.

[0015] Optionally, the battery is connected in series with the controlled terminal of the first relay and the controlled terminal of the second relay.

[0016] To solve the above-mentioned technical problems, this utility model also provides a loader starting system, including: a key switch, a first relay, a second relay, an ECU, a battery, and a starter motor;

[0017] The first relay includes a control terminal and a controlled terminal, and the second relay includes a control terminal and a controlled terminal;

[0018] The key switch, the control terminal of the first relay, the control terminal of the second relay, and the ECU constitute a control system; the key switch is connected to the input terminal A1 of the control terminal of the first relay, and the key switch is connected to the input terminal A2 of the control terminal of the second relay; the output terminal C1 of the control terminal of the first relay is connected to the ECU, and the output terminal C2 of the control terminal of the second relay is connected to the ECU.

[0019] The battery, the controlled terminal of the first relay, the controlled terminal of the second relay, and the starter motor constitute a controlled system; the battery is connected to the input terminal B1 of the controlled terminal of the first relay, the output terminal E1 of the controlled terminal of the first relay is connected to the input terminal B2 of the controlled terminal of the second relay, and the output terminal E2 of the controlled terminal of the second relay is connected to the starter motor.

[0020] Optionally, in the control system, when the key switch is turned to the start position, the start signal flows from the output terminal A of the key switch to the input terminal A1 of the control terminal of the first relay and the input terminal A2 of the control terminal of the second relay, and then flows out through the output terminal C1 of the control terminal of the first relay and the output terminal C2 of the control terminal of the second relay, and simultaneously flows to the input terminal C of the ECU. The ECU receives the signal, the control terminals of the first relay and the second relay are turned on, the internal coils of the first relay and the second relay are energized to control the internal switches to close, and the switches L1 of the first relay and L2 of the second relay are closed.

[0021] Optionally, when the switches L1 and L2 of the first and second relays are closed, in the controlled system, the current signal flows from the output terminal B of the battery to the input terminal B1 of the controlled terminal of the first relay, through the first relay switch L1 and the output terminal E1 of the first relay, to the input terminal B2 of the controlled terminal of the second relay, through the second relay switch L2 and the output terminal E2 of the second relay, and finally to the starter motor to control the vehicle to start.

[0022] Compared with the prior art, the beneficial effects of this disclosure are:

[0023] This disclosure discloses a loader starting circuit and system, including a key switch, an ECU, a first relay, a second relay, a battery, and a starter motor. The overall structure is simple. The starting signal flows simultaneously from the key switch to the control terminals of the first and second relays, then to the ECU. The ECU receives the signal, energizing the internal coils of the first and second relays to close their internal switches. The first relay switch L1 and the second relay switch L2 close, and a current signal flows from the battery to the controlled terminal of the first relay, then to the controlled terminal of the second relay, and finally to the starter motor, controlling the vehicle to start. If the control terminal of one relay fails and remains closed, the starter motor stops working by closing the other relay. Based on the loader starting circuit and system proposed in this embodiment, if a relay fails and becomes stuck, causing its controlled terminal to remain closed, the vehicle can be shut off by turning off the key switch to open the other relay, thus solving the risk of being unable to shut off the vehicle due to a single relay failure. Attached Figure Description

[0024] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0025] Figure 1 This is a block diagram of a loader starting circuit structure in one embodiment;

[0026] Figure 2 This is a block diagram of a loader start-up circuit control circuit structure in one embodiment;

[0027] Figure 3 This is a block diagram of the controlled circuit structure of a loader starting circuit in one embodiment;

[0028] 1-Key switch, 2-First relay, 3-Second relay, 4-Starter motor, 5-Battery, 6-ECU. Detailed Implementation

[0029] The core of this utility model is to provide a loader starting circuit and system that uses dual relays. When one relay experiences a contact sticking fault and the controlled end remains closed, the other relay can still perform normal on / off control functions, thereby effectively eliminating the risk of single-point failure.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0032] Figure 1 This is a block diagram of a loader starting circuit structure in one embodiment, for reference. Figure 1 A loader starting circuit includes: a key switch 1, a first relay 2, a second relay 3, an ECU 6, a battery 5, and a starter motor 4.

[0033] The first relay 2 includes a control terminal and a controlled terminal, and the second relay 3 includes a control terminal and a controlled terminal;

[0034] The key switch 1, the control terminal of the first relay 2, the control terminal of the second relay 3, and the ECU 6 constitute a control circuit; the key switch 1 is connected to the input terminal A1 of the control terminal of the first relay 2, and the key switch 1 is connected to the input terminal A2 of the control terminal of the second relay 3; the output terminal C1 of the control terminal of the first relay 2 is connected to the ECU 6, and the output terminal C2 of the control terminal of the second relay 3 is connected to the ECU 6.

[0035] The battery 5, the controlled terminal of the first relay 2, the controlled terminal of the second relay 3, and the starter 4 constitute a controlled circuit; the battery 5 is connected to the input terminal B1 of the controlled terminal of the first relay 2, the output terminal E1 of the controlled terminal of the first relay 2 is connected to the input terminal B2 of the controlled terminal of the second relay 3, and the output terminal E2 of the controlled terminal of the second relay 3 is connected to the starter 4.

[0036] For example, in this embodiment, in the control circuit, when the key switch 1 is turned to the start position, the start signal flows from the output terminal A of the key switch 1 to the input terminal A1 of the control terminal of the first relay 2 and the input terminal A2 of the control terminal of the second relay 3, and then flows out through the output terminal C1 of the control terminal of the first relay 2 and the output terminal C2 of the control terminal of the second relay 3, and simultaneously flows to the input terminal C of the ECU 6. The ECU 6 receives the signal, and the internal coils of the first relay 2 and the second relay 3 are energized to control the internal switches to close, thus closing the switches L1 of the first relay 2 and L2 of the second relay 3.

[0037] For example, in this embodiment, when the switch L1 of the first relay 2 and the switch L2 of the second relay 3 are closed, in the controlled circuit, the current signal flows from the output terminal B of the battery 5 to the input terminal B1 of the controlled terminal of the first relay 2, through the switch L1 of the first relay 2 and the output terminal E1 of the controlled terminal of the first relay 2, to the input terminal B2 of the controlled terminal of the second relay 3, through the switch L2 of the second relay 3 and the output terminal E2 of the controlled terminal of the second relay 3, and finally to the starter motor 4 to control the vehicle to start.

[0038] For example, in this embodiment, when the control terminal of the first relay 2 malfunctions, causing the switch L1 of the first relay 2 to remain closed, the key switch 1 is closed, no current flows through the control terminal of the second relay 3, the switch L2 of the second relay 3 is opened, and the starter stops working.

[0039] For example, in this embodiment, when the control terminal of the second relay 3 malfunctions, causing the switch L2 of the second relay 3 to remain closed, the key switch 1 is closed, no current flows through the control terminal of the first relay 2, the switch L1 of the first relay 2 is opened, and the starter stops working.

[0040] For example, in this embodiment, such as Figure 2 As shown, the key switch 1 is connected in parallel with the control terminal of the first relay 2 and the control terminal of the second relay 3.

[0041] For example, in this embodiment, such as Figure 3 As shown, the storage battery 5 is connected in series with the controlled terminal of the first relay 2 and the controlled terminal of the second relay 3.

[0042] This utility model also provides an embodiment of a loader starting system, including: a key switch, a first relay, a second relay, an ECU, a battery, and a starter motor.

[0043] The loader starting system provided in this embodiment corresponds to the loader starting circuit described above, and therefore has the same beneficial effects as the loader starting circuit described above. Therefore, for the embodiment of the loader starting system, please refer to the description of the embodiment of the loader starting circuit, which will not be repeated here.

[0044] Working principle:

[0045] When starting the loader, first turn the key switch 1 to the start position. The start signal flows from the output terminal A of the key switch 1 to the control terminal A1 of the first relay 2 and the control terminal A2 of the second relay 3. Then, it flows out through the output terminals C1 and C2 of the first and second relays, and simultaneously to the input terminal C of the ECU. The ECU receives the signal, energizes the internal coils of the first and second relays 2 and 3, and controls the internal switches to close. The switches L1 of the first relay 2 and L2 of the second relay 3 close, and the current signal flows from the output terminal B of the battery 5 to the controlled terminal B1 of the first relay 2. After passing through the switch L1 and the output terminal E1 of the controlled terminal of the first relay 2, it flows to the input terminal B2 of the controlled terminal of the second relay 3. After passing through the switch L2 and the output terminal E2 of the controlled terminal of the second relay 3, it finally flows to the input terminal D of the starter motor 4, thereby controlling the vehicle to start. When the key switch is closed, if one of the relays in the relay group is damaged and stuck, causing the controlled terminal to remain closed, the vehicle can be turned off by turning off the key switch 1 to open the other relay.

[0046] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A loader starting circuit, characterized in that, This includes the key switch, first relay, second relay, ECU, battery, and starter motor; The first relay includes a control terminal and a controlled terminal, and the second relay includes a control terminal and a controlled terminal; The key switch, the control terminal of the first relay, the control terminal of the second relay, and the ECU constitute a control circuit; the key switch is connected to the input terminal A1 of the control terminal of the first relay, and the key switch is connected to the input terminal A2 of the control terminal of the second relay; the output terminal C1 of the control terminal of the first relay is connected to the ECU, and the output terminal C2 of the control terminal of the second relay is connected to the ECU. The battery, the controlled terminal of the first relay, the controlled terminal of the second relay, and the starter motor constitute the controlled circuit. The battery is connected to the input terminal B1 of the controlled terminal of the first relay, the output terminal E1 of the controlled terminal of the first relay is connected to the input terminal B2 of the controlled terminal of the second relay, and the output terminal E2 of the controlled terminal of the second relay is connected to the starter motor.

2. The loader starting circuit of claim 1, wherein, In the control circuit, when the key switch is turned to the start position, the start signal flows from the output terminal A of the key switch to the input terminal A1 of the control terminal of the first relay and the input terminal A2 of the control terminal of the second relay. Then, it flows out through the output terminal C1 of the control terminal of the first relay and the output terminal C2 of the control terminal of the second relay, and simultaneously flows to the input terminal C of the ECU. The ECU receives the signal, and the internal coils of the first relay and the second relay are energized to control the internal switches to close, thus closing the switches L1 of the first relay and L2 of the second relay.

3. The loader starting circuit of claim 2, wherein, When the switches L1 and L2 of the first and second relays are closed, the current signal flows from the output terminal B of the battery to the input terminal B1 of the controlled terminal of the first relay, through the first relay switch L1 and the output terminal E1 of the first relay, to the input terminal B2 of the controlled terminal of the second relay, through the second relay switch L2 and the output terminal E2 of the second relay, and finally to the starter motor to control the vehicle to start.

4. The loader starting circuit of claim 1, wherein, When the control terminal of the first relay malfunctions, causing the first relay switch L1 to remain closed, the key switch is closed, no current flows through the control terminal of the second relay, the second relay switch L2 is opened, and the starter stops working.

5. The loader starting circuit of claim 1, wherein, When the control terminal of the second relay malfunctions, causing the second relay switch L2 to remain closed, the key switch is closed, no current flows through the control terminal of the first relay, the first relay switch L1 is opened, and the starter stops working.

6. The loader starting circuit of claim 1, wherein, The key switch is connected in parallel with the control terminals of the first relay and the second relay.

7. The loader starting circuit as described in claim 1, characterized in that, The battery is connected in series with the controlled terminal of the first relay and the controlled terminal of the second relay.

8. A loader starting system characterized by, Includes: key switch, first relay, second relay, ECU, battery, and starter motor; The first relay includes a control terminal and a controlled terminal, and the second relay includes a control terminal and a controlled terminal; The key switch, the control terminal of the first relay, the control terminal of the second relay, and the ECU constitute a control system; the key switch is connected to the input terminal A1 of the control terminal of the first relay, and the key switch is connected to the input terminal A2 of the control terminal of the second relay; the output terminal C1 of the control terminal of the first relay is connected to the ECU, and the output terminal C2 of the control terminal of the second relay is connected to the ECU. The battery, the controlled terminal of the first relay, the controlled terminal of the second relay, and the starter motor constitute a controlled system; the battery is connected to the input terminal B1 of the controlled terminal of the first relay, the output terminal E1 of the controlled terminal of the first relay is connected to the input terminal B2 of the controlled terminal of the second relay, and the output terminal E2 of the controlled terminal of the second relay is connected to the starter motor.

9. The loader starting system as described in claim 8, characterized in that, In the control system, when the key switch is turned to the start position, the start signal flows from the output terminal A of the key switch to the input terminal A1 of the control terminal of the first relay and the input terminal A2 of the control terminal of the second relay. Then, it flows out through the output terminal C1 of the control terminal of the first relay and the output terminal C2 of the control terminal of the second relay, and simultaneously flows to the input terminal C of the ECU. The ECU receives the signal, the control terminals of the first relay and the second relay are turned on, the internal coils of the first relay and the second relay are energized to control the internal switches to close, and the switches L1 of the first relay and L2 of the second relay are closed.

10. The loader starting system as described in claim 9, characterized in that, When the switches L1 and L2 of the first and second relays are closed, the current signal flows from the output terminal B of the battery to the input terminal B1 of the controlled terminal of the first relay, through the first relay switch L1 and the output terminal E1 of the first relay, to the input terminal B2 of the controlled terminal of the second relay, through the second relay switch L2 and the output terminal E2 of the second relay, and finally to the starter motor to control the vehicle to start.

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