Reliable digging and loading machine starting control system and method

Abstract

According to the reliable digging and loading machine starting control system and method, through organic combination of a relay, an engine controller ECU, a whole vehicle controller VCU and a key switch, participation of the whole vehicle controller VCU in the starting control system is reduced, electrical elements such as the relay are added, the reliability of the starting control process is improved, the control logic is reliable, and the starting control efficiency is improved. Elements occupy small whole machine space, and whole machine arrangement is facilitated. According to the method, the overall control logic is reasonable, and participation of the whole machine controller VCU in the control process is reduced. And through mutual restriction of a plurality of relays, the neutral gear starting reliability of the whole vehicle is improved.

Description

Technical Field

[0001] The invention relates to a reliable starting control system and method for an excavator loader, belonging to the technical field of engineering machinery. Background Art

[0002] As a multifunctional engineering machinery that combines the features of traditional excavators and loaders, the backhoe loader is suitable for a variety of working conditions and is being accepted by domestic and foreign markets.

[0003] When designing the starting system of the excavator, it is necessary to set the control logic of neutral start to protect the rigid connection between the engine and the gearbox. Due to the different applicable voltages of the ECU and VCU, the starting control logic is relatively complex, and it is often impossible to effectively control the starting of branches with different voltages and provide proper protection.

[0004] Therefore, those skilled in the art are in urgent need of improving the existing backhoe loader starting system. Summary of the invention

[0005] Purpose: To overcome the deficiencies in the prior art, the present invention provides a reliable backhoe loader start-up control system and method.

[0006] Technical solution: To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] In the first aspect, a reliable backhoe loader starting control system includes: a key switch, wherein the B port of the key switch is connected to the key switch port of the fuse box, the BR end of the key switch is connected to the power-on signal port of the vehicle controller VCU, the R2 end of the key switch is connected to one end of the switch of the neutral relay R04, the other end of the switch of the neutral relay R04 is connected to one end of the coil of the 12V relay R01, and the other end of the coil of the 12V relay R01 is grounded.

[0008] One end of the coil of the starter relay R02 is connected to the starter switch port of the engine controller ECU, and the other end of the coil of the starter relay R02 is connected to the starter relay port of the engine controller ECU. One end of the switch of the starter relay R02 is connected to the 50 port of the starter motor, and the other end of the switch of the starter relay R02 is connected to the positive pole of the 12V battery, and the positive pole of the 12V battery is also connected to the 30 port of the starter motor, and the 31 port of the starter motor is grounded, and the positive pole of the 12V battery is also connected to the power port of the fuse box.

[0009] One end of the coil of the main relay R03 is connected to the main relay power port of the fuse box, the other end of the coil of the main relay R03 is connected to the power-on signal port of the engine controller ECU, one end of the switch of the main relay R03 is connected to the main relay power port of the fuse box, the other end of the switch of the main relay R03 is connected to the primary side of the DC-DC transformer, the secondary side of the DC-DC transformer is respectively connected to the ECU power port of the engine controller ECU and one end of the switch of the 12V relay R01, the other end of the switch of the 12V relay R01 is respectively connected to one end of the coil of the starter relay R02 and the starter switch port of the engine controller ECU. The gear handle is used to output a neutral signal to the vehicle controller VCU when the handle is in the middle position, the neutral relay end of the vehicle controller VCU is connected to one end of the coil of the neutral relay R04, and the other end of the coil of the neutral relay R04 is connected to the ground.

[0010] As a preferred solution, the vehicle controller VCU is used to convey the current vehicle status in the vehicle communication.

[0011] As a preferred solution, the engine controller ECU plays a role in transmitting the vehicle start signal.

[0012] As a preferred solution, the primary side voltage of the DC-DC transformer is 12V, and the secondary side voltage is 24V.

[0013] As a preferred solution, the fuse box supplies power to the key switch, the main relay R03 and the main relay R03 and provides insurance measures. The power supply of the fuse box is directly powered by a 12V battery.

[0014] As a preferred solution, the relays are uniformly installed on the wall of the battery box of the backhoe loader.

[0015] As a preferred solution, the DC-DC transformer is installed on the engine controller ECU mounting plate, adjacent to the engine controller ECU mounting position.

[0016] As a preferred solution, the vehicle controller VCU is installed under the right instrument interior cover.

[0017] As a preferred solution, the key switch is installed on the right instrument panel; the fuse box is installed in the lower left cover of the front instrument.

[0018] In a second aspect, a reliable working method of a starting control system for an excavator loader specifically includes:

[0019] Turn the key switch to the start position.

[0020] The 12V power supply of the fuse box is connected through the B port of the key switch and is led out through the BR port of the key switch and the R2 port of the key switch respectively.

[0021] The BR port of the key switch is energized, so that the power-on signal port of the vehicle controller VCU is energized, and the vehicle controller VCU is activated.

[0022] Set the gear handle to neutral. After the vehicle controller VCU receives the neutral signal output by the gear handle, the neutral relay port of the VCU outputs current to energize the coil of the neutral relay R04.

[0023] The coil of neutral relay R04 is energized, and the switch of neutral relay R04 is pulled up. The power supply of R2 port of key switch is energized through the switch of neutral relay R04 to the coil of 12V relay R01, and the switch of 12V relay R01 is pulled up.

[0024] The 12V power supply of the fuse box is energized to the power-on signal port of the engine controller ECU through the main relay R03, and the engine controller ECU is activated.

[0025] The coil of the main relay R03 is energized, the switch of the main relay R03 is pulled up, and the 12V power supply of the fuse box is energized through the switch of the main relay R03 so that the primary side port of the DC-DC transformer is energized.

[0026] The secondary side port of the DC-DC transformer outputs 24V and is introduced into the ECU power port of the engine controller ECU, so that the engine controller ECU works, and through the switch of the 12V relay R01, the starter relay R02 is energized, and the starter switch port and the starter relay port of the engine controller ECU are energized respectively, which is used to externally feedback the working conditions of the starter switch and the starter relay.

[0027] The starter relay R02 is energized, and the switch of the starter relay R02 is pulled up, so that the 50 port of the starter motor is energized, and the 30 port of the starter motor is connected to the positive pole of the battery. The 50 port of the starter motor and the 30 port of the starter motor form a circuit with the 31 port of the starter motor respectively. The starter motor is energized, driving the engine to rotate, and the whole vehicle is started successfully.

[0028] Beneficial effects: The present invention provides a reliable starting control system and method for an excavator. The present invention reduces the participation of the whole machine controller VCU in the starting control system through the organic combination of relays, engine controller ECU, vehicle controller VCU and key switches, and adds electrical components such as relays to improve the reliability of the starting control process. The control logic is reliable, the components occupy a small space in the whole machine, and the layout of the whole machine is convenient.

[0029] The overall control logic of the present invention is reasonable, and the participation of the whole machine controller VCU in the control process is reduced. Through the mutual restriction of multiple relays, the reliability of the neutral gear start of the whole vehicle is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the system of the present invention. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the examples of the present invention in conjunction with the accompanying drawings in the examples of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present invention.

[0032] The present invention will be further described below in conjunction with specific embodiments.

[0033] Embodiment 1:

[0034] This embodiment introduces a reliable excavator startup control system. Figure 1 As shown, it includes: key switch, starter relay R02, main relay R03, 12V relay R01, gear lever, vehicle controller VCU, engine controller ECU, DC-DC transformer, fuse box, battery, and starter motor.

[0035] The B port of the key switch is connected to the key switch port of the fuse box through line F20, and the fuse box is used to power the key switch. The BR end of the key switch is connected to the power-on signal port of the vehicle controller VCU through line 7. The R2 end of the key switch is connected to one end of the switch of the neutral relay R04 through line R2. The other end of the switch of the neutral relay R04 is connected to one end of the coil of the 12V relay R01. The other end of the coil of the 12V relay R01 is grounded. The on and off of the line is determined by whether the neutral relay coil is energized.

[0036] One end of the coil of the starter relay R02 is connected to the starter switch port of the engine controller ECU through line K475, and the other end of the coil of the starter relay R02 is connected to the starter relay port of the engine controller ECU through line V13. One end of the switch of the starter relay R02 is connected to the 50 port of the starter motor, and the other end of the switch of the starter relay R02 is connected to the positive pole of the 12V battery to control whether the 50 port of the starter motor is powered. The positive pole of the 12V battery is also connected to the 30 port of the starter motor, and the 31 port of the starter motor is grounded. The positive pole of the 12V battery is also connected to the power port of the fuse box.

[0037] One end of the coil of the main relay R03 is connected to the main relay power port of the fuse box through line F5, the other end of the coil of the main relay R03 is connected to the power-on signal port of the engine controller ECU through line R472, one end of the switch of the main relay R03 is connected to the main relay power port of the fuse box through line F5, the other end of the switch of the main relay R03 is connected to the primary side of the DC-DC transformer through line R472, the secondary side of the DC-DC transformer is respectively connected to the ECU power port of the engine controller ECU and one end of the switch of the 12V relay R01 through line K474, and the other end of the switch of the 12V relay R01 is respectively connected to one end of the coil of the starter relay R02 and the starter switch port of the engine controller ECU through line K475. The gear handle is used to output a neutral signal to the vehicle controller VCU when the handle is in the middle position. The neutral relay end of the vehicle controller VCU is connected to one end of the coil of the neutral relay R04, and the other end of the coil of the neutral relay R04 is connected to the ground.

[0038] Furthermore, the vehicle controller VCU is used to convey the current vehicle status in the vehicle communication.

[0039] Furthermore, the engine controller ECU plays a role in transmitting the vehicle start signal.

[0040] Furthermore, the primary side voltage of the DC-DC transformer is 12 V, and the secondary side voltage is 24 V. The primary side voltage comes from the fuse box, and is connected to the primary side through the switch of the main relay R03. The secondary side voltage directly powers the engine controller ECU, and powers the coil of the starter relay R02 through the switch of the 12V relay R01.

[0041] Furthermore, the fuse box supplies power to the key switch, the main relay R03 and the main relay R03 and provides insurance measures. The power supply of the fuse box is directly powered by a 12V battery.

[0042] Furthermore, the relays are uniformly installed on the wall of the battery box of the excavator loader; the DC-DC transformer is installed on the engine controller ECU mounting plate, adjacent to the engine controller ECU mounting position; the vehicle controller VCU is installed under the right instrument interior cover; the key switch is installed on the right instrument panel; the fuse box is installed in the lower left cover of the front instrument.

[0043] Embodiment 2:

[0044] This embodiment introduces a reliable working method of a backhoe loader startup control system, which specifically includes:

[0045] Turn the key switch to the start position.

[0046] The 12V power supply of the fuse box is connected through the B port of the key switch and is led out through the BR port of the key switch and the R2 port of the key switch respectively.

[0047] The No. 7 line led out from the BR port of the key switch is energized, so that the power-on signal port of the vehicle controller VCU is energized, and the vehicle controller VCU is activated.

[0048] The driver puts the gear lever in neutral. After the vehicle controller VCU receives the neutral signal output by the gear lever, the neutral relay port of the VCU outputs current to energize the coil of the neutral relay R04.

[0049] The coil of neutral relay R04 is energized, and the switch of neutral relay R04 is pulled up, so that the power source from line R2 of R2 port of key switch is energized through line 9 via the switch of neutral relay R04, and the coil of 12V relay R01 is energized, and the switch of 12V relay R01 is pulled up.

[0050] The 12V power supply of the fuse box is energized to the power-on signal port of the engine controller ECU through the main relay R03, and the engine controller ECU is activated.

[0051] The coil of the main relay R03 is energized, the switch of the main relay R03 is pulled up, and the 12V power supply of the fuse box is energized through the switch of the main relay R03 so that the primary side port of the DC-DC transformer is energized.

[0052] The secondary side port of the DC-DC transformer outputs 24V which is introduced into the ECU power port of the engine controller ECU through line R474, so that the engine controller ECU works, and through the switch of the 12V relay R01, the starter relay R02 is energized, and the starter switch port and the starter relay port of the engine controller ECU are energized respectively, so as to provide external feedback on the working conditions of the starter switch and the starter relay.

[0053] The starter relay R02 is energized, and the switch of the starter relay R02 is pulled up, so that the 50 port of the starter motor is energized, and the 30 port of the starter motor is connected to the positive pole of the battery. The 50 port of the starter motor and the 30 port of the starter motor form a circuit with the 31 port of the starter motor respectively. The starter motor is energized, driving the engine to rotate, and the whole vehicle is started successfully.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A reliable excavator start-up control system, characterized by: include: A key switch, wherein the B port of the key switch is connected to the key switch port of the fuse box, the BR end of the key switch is connected to the power-on signal port of the vehicle controller VCU, the R2 end of the key switch is connected to one end of the switch of the neutral relay R04, the other end of the switch of the neutral relay R04 is connected to one end of the coil of the 12V relay R01, and the other end of the coil of the 12V relay R01 is grounded; One end of the coil of the starter relay R02 is connected to the starter switch port of the engine controller ECU, and the other end of the coil of the starter relay R02 is connected to the starter relay port of the engine controller ECU; one end of the switch of the starter relay R02 is connected to the 50 port of the starter motor, and the other end of the switch of the starter relay R02 is connected to the positive electrode of the 12V battery, the positive electrode of the 12V battery is also connected to the 30 port of the starter motor, the 31 port of the starter motor is grounded, and the positive electrode of the 12V battery is also connected to the power port of the fuse box; One end of the coil of the main relay R03 is connected to the main relay power port of the fuse box, the other end of the coil of the main relay R03 is connected to the power-on signal port of the engine controller ECU, one end of the switch of the main relay R03 is connected to the main relay power port of the fuse box, the other end of the switch of the main relay R03 is connected to the primary side of the DC-DC transformer, the secondary side of the DC-DC transformer is respectively connected to the ECU power port of the engine controller ECU and one end of the switch of the 12V relay R01, the other end of the switch of the 12V relay R01 is respectively connected to one end of the coil of the starter relay R02 and the starter switch port of the engine controller ECU; the gear handle is used to output a neutral signal to the vehicle controller VCU when the handle is in the middle position, the neutral relay end of the vehicle controller VCU is connected to one end of the coil of the neutral relay R04, and the other end of the coil of the neutral relay R04 is connected to the ground.

2. A reliable backhoe loader start-up control system according to claim 1, characterized in that: The vehicle controller VCU is used to convey the current vehicle status in vehicle communication.

3. A reliable backhoe loader start-up control system according to claim 1, characterized in that: The engine controller ECU plays a role in transmitting the vehicle start signal.

4. A reliable backhoe loader start-up control system according to claim 1, characterized in that: The primary side voltage of the DC-DC transformer is 12V, and the secondary side voltage is 24V.

5. A reliable backhoe loader start-up control system according to claim 1, characterized in that: The fuse box supplies power to the key switch, the main relay R03 and the main relay R03 and provides insurance measures. The power supply of the fuse box is directly supplied by a 12V battery.

6. A reliable backhoe loader start-up control system according to claim 1, characterized in that: The relays are uniformly installed on the wall of the battery box of the backhoe loader.

7. A reliable backhoe loader start-up control system according to claim 1, characterized in that: The DC-DC transformer is mounted on the engine controller ECU mounting plate, adjacent to the engine controller ECU mounting position.

8. A reliable backhoe loader start-up control system according to claim 1, characterized in that: The vehicle controller VCU is installed under the right instrument interior cover.

9. A reliable backhoe loader start-up control system according to claim 1, characterized in that: The key switch is installed on the right instrument panel, and the fuse box is installed in the lower left cover of the front instrument.

10. A reliable working method of a backhoe loader start-up control system according to any one of claims 1 to 9, characterized in that: Specifically include: Turn the key switch to the start position; The 12V power supply of the fuse box is connected through the B port of the key switch and is led out through the BR port of the key switch and the R2 port of the key switch respectively; The BR port of the key switch is powered, so that the power-on signal port of the vehicle controller VCU is powered, and the vehicle controller VCU is activated; Put the gear lever in neutral. After the vehicle controller VCU receives the neutral signal output by the gear lever, the neutral relay port of the VCU outputs current to energize the coil of the neutral relay R04. The coil of the neutral relay R04 is energized, and the switch of the neutral relay R04 is pulled up. The power supply of the R2 port of the key switch is energized through the switch of the neutral relay R04, so that the coil of the 12V relay R01 is energized, and the switch of the 12V relay R01 is pulled up. The 12V power supply of the fuse box is energized through the main relay R03 so that the power-on signal port of the engine controller ECU is powered, and the engine controller ECU is activated; The coil of the main relay R03 is energized, the switch of the main relay R03 is pulled up, and the 12V power supply of the fuse box is energized through the switch of the main relay R03 to the primary side port of the DC-DC transformer; The secondary side port of the DC-DC transformer outputs 24V and is introduced into the ECU power port of the engine controller ECU, so that the engine controller ECU works, and the starter relay R02 is powered through the switch of the 12V relay R01, and the starter switch port and the starter relay port of the engine controller ECU are powered respectively, so as to feed back the working conditions of the starter switch and the starter relay to the outside; The starter relay R02 is energized, and the switch of the starter relay R02 is pulled up, so that the 50 port of the starter motor is energized, and the 30 port of the starter motor is connected to the positive pole of the battery. The 50 port of the starter motor and the 30 port of the starter motor form a circuit with the 31 port of the starter motor respectively. The starter motor is energized, driving the engine to rotate, and the whole vehicle is started successfully.

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