Relay, engine start control system and method, controller, and working machine

Abstract

The invention provides a relay, an engine starting control system and method, a controller and an operation machine, and relates to the technical field of electromechanics. A starting motor of the engine starting control system is connected with a first electric connection point of a relay, and the first electric connection point is connected with a first contact group; the controller is connected with a second electric connection point of the relay, the second electric connection point is connected with the second contact group through the electronic switch, the first contact group is connected with the second contact group, the electronic switch is further connected with a third electric connection point of the relay, and the third electric connection point of the relay is further connected with the storage battery; the controller is further connected with a fourth electric connection point of the relay, the fourth electric connection point is further connected with a relay coil, the relay coil is further connected with a fifth electric connection point, and the fifth electric connection point is grounded. According to the engine starting control system, when the engine is started, the contact can be attracted before being powered on and disengaged after being powered off, and contact ablation and starting motor damage in the engine starting process are avoided.

Description

Technical Field

[0001] This application relates to the field of electromechanical technology, and particularly to a relay, an engine starting control system and method, a controller, and a construction machine. Background Art

[0002] The starting of an engine refers to the process from when the starting motor of the engine is connected to the power supply and starts to rotate until it reaches the rated speed.

[0003] In the related art, construction machinery and automobiles generally use a controller to drive a relay to control the S terminal of the engine starting motor to start the vehicle. The starting motor is a DC motor, and direct starting wear is generally used in the industry. At the moment when the relay is powered on, the peak current can reach 135A, and this current will impact the relay. Therefore, there are high requirements for the performance of the relay. Figure 1 For a structural schematic diagram of a certain relay in the related art, as Figure 1 shown, the relay includes electrical connection points a, b, c, d, a coil, contact group A, and contact group B. Electrical connection point a is connected to electrical connection point c through the coil. Electrical connection point a is also grounded. Electrical connection point c is also connected to the controller 2. Electrical connection point b is connected to the battery 3. Electrical connection point b is also connected to contact group A. Contact group A is connected to contact group B. Contact group B is also connected to electrical connection point d. Electrical connection point d is also connected to the starting motor 4. When the engine starts, the controller 2 outputs a signal to electrical connection point c to energize the coil. Energizing the coil will cause contact group A and contact group B to be attracted respectively, so that the battery 3 can supply power to the starting motor 4.

[0004] However, since electrical connection points b and d are both energized at this time, and there is a certain distance between the two contacts in contact group A / B before they are in contact, it may cause electric sparks or arcs between the two contacts. The electric sparks or arcs will ablate the contacts, and in severe cases, the contacts cannot be released and the relay cannot be cut off, resulting in damage to the starting motor. Summary of the Invention

[0005] Embodiments of this application provide a relay, an engine starting control system and method, a controller, and a construction machine, which can avoid ablation of the relay contacts and damage to the starting motor during the engine starting process.

[0006] In a first aspect, an embodiment of this application provides a relay, including: a first electrical connection point, a second electrical connection point, a third electrical connection point, a fourth electrical connection point, a fifth electrical connection point, and an internally provided relay coil, an electronic switch, a first contact group, and a second contact group;

[0007] The first electrical connection point is connected to the first contact group, the first contact group is connected to the second contact group, the second contact group is connected to the second electrical connection point through the electronic switch, and the electronic switch is also connected to the third electrical connection point;

[0008] The fourth electrical connection point is connected to the relay coil, the relay coil is also connected to the fifth electrical connection point, and the fifth electrical connection point is grounded.

[0009] In a second aspect, an embodiment of the present application provides an engine starting control system, including: a start switch, a start motor, a controller, and a relay as described in the first aspect;

[0010] The start switch is electrically connected to the controller, and the start motor is connected to the first electrical connection point of the relay;

[0011] The controller is respectively connected to the second electrical connection point and the fourth electrical connection point of the relay, and the third electrical connection point of the relay is also connected to a storage battery.

[0012] In a possible implementation manner, the controller is further respectively connected to a parking switch, a pilot lock, and a speed sensor of the work machine.

[0013] In a possible implementation manner, the storage battery is also respectively electrically connected to the start switch and the controller.

[0014] In a third aspect, an embodiment of the present application provides an engine starting control method, which is applied to the engine starting control system described in the second aspect, and includes:

[0015] After detecting that the work machine meets the engine starting condition, the controller outputs a signal to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are each in a suction state;

[0016] After a preset time period, the controller outputs a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the start motor through the closed electronic switch, the first contact group and the second contact group in the suction state.

[0017] In a possible implementation manner, after the controller outputs a signal to the second electrical connection point to close the electronic switch, it further includes:

[0018] After determining that the engine starting is completed, the controller stops outputting a signal to the second electrical connection point to open the electronic switch, so that the storage battery stops supplying power, and the first contact group and the second contact group lose power;

[0019] After a preset duration, the controller stops outputting a signal to the fourth electrical connection point to de-energize the relay coil, so that the first contact group and the second contact group are each in a disengaged state.

[0020] In a possible implementation, the operating machine meets the engine start conditions, including:

[0021] The parking switch of the operating machine is disconnected, the pilot lock is disconnected, the engine speed detected by the speed sensor is 0, and a start signal sent by the start switch is received.

[0022] In a possible implementation, it further includes:

[0023] The speed sensor is used to detect the engine speed in real time. When the detected engine speed reaches a preset speed threshold, it is determined that the engine start is completed.

[0024] Fourthly, an embodiment of the present application provides a controller, including:

[0025] A processor, and a memory communicatively connected to the processor;

[0026] The memory is used to store computer execution instructions;

[0027] The processor is used to execute the computer execution instructions stored in the memory, so that the processor executes as described in the above third aspect and / or various possible implementations of the third aspect.

[0028] Fifthly, an embodiment of the present application provides an operating machine, including: the engine start control system described in the second aspect, where the engine start control system includes a start switch, a start motor, a controller, and a relay;

[0029] The relay includes a first electrical connection point, a second electrical connection point, a third electrical connection point, a fourth electrical connection point, a fifth electrical connection point, and a built-in relay coil, an electronic switch, a first contact group, and a second contact group;

[0030] The start motor is connected to the first electrical connection point, and the first electrical connection point is also connected to the first contact group; the controller is connected to the second electrical connection point, and the second electrical connection point is also connected to the second contact group through the electronic switch. The first contact group and the second contact group are connected. The electronic switch is also connected to the third electrical connection point, and the third electrical connection point is also connected to the storage battery; the controller is also connected to the fourth electrical connection point, the fourth electrical connection point is also connected to the relay coil, the relay coil is also connected to the fifth electrical connection point, and the fifth electrical connection point is grounded.

[0031] The controller is configured to output a signal to the fourth electrical connection point to energize the relay coil after detecting that the working machine meets the engine start condition, so that the first contact group and the second contact group are each in an engaged state; after a preset time period, output a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the engaged state.

[0032] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, are used to implement the third aspect and / or various possible implementation manners of the third aspect as described above.

[0033] In a seventh aspect, an embodiment of the present application provides a computer program product including a computer program that, when executed by a processor, is used to implement the third aspect and / or various possible implementation manners of the third aspect as described above.

[0034] An embodiment of the present application provides a relay, an engine starting control system and method, a controller, and a working machine. The starting motor of the engine starting control system can be connected to the first electrical connection point of the relay, and the first electrical connection point is connected to the first contact group built in the relay; the controller is connected to the second electrical connection point of the relay, and the second electrical connection point is further connected to the second contact group built in the relay through an electronic switch. The first contact group and the second contact group are connected, the electronic switch is further connected to the third electrical connection point of the relay, and the third electrical connection point of the relay is further connected to the storage battery; the controller is further connected to the fourth electrical connection point of the relay, the fourth electrical connection point is further connected to the relay coil built in the relay, the relay coil is further connected to the fifth electrical connection point, and the fifth electrical connection point is grounded. After detecting that the working machine meets the engine start condition, the controller can output a signal to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are each in an engaged state. During this process, since the electronic switch is in an open state, the first contact group and the second contact group are both in a de-energized state, and no electric spark or arc will be generated. After the first contact group and the second contact group are each in an engaged state, the controller will output a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the engaged state, and the engine is started. Through such a setting, the relay can achieve that the contacts are engaged before being energized and separated after being de-energized during engine start, avoiding the generation of electric sparks or arcs during the contact engagement process, thereby avoiding the ablation of the relay contacts and the damage of the starting motor during the engine start process. Description of the Drawings

[0035] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0036] Figure 1 It is a schematic structural diagram of a certain relay in the prior art;

[0037] Figure 2 It is a schematic structural diagram of a relay according to an embodiment of this application;

[0038] Figure 3 It is a schematic structural diagram of an engine starting control system according to an embodiment of this application;

[0039] Figure 4 It is a flowchart of an engine starting control method according to an embodiment of this application;

[0040] Figure 5 It is a schematic structural diagram of a controller according to an embodiment of this application;

[0041] Figure 6 It is a schematic structural diagram of a controller according to another embodiment of this application.

[0042] Reference numerals: 1, relay; 11, first electrical connection point; 12, second electrical connection point; 13, third electrical connection point; 14, fourth electrical connection point; 15, fifth electrical connection point; 16, relay coil; 17, electronic switch; 18, first contact group; 19, second contact group; 2, controller; 3, storage battery; 4, starting motor; 5, starting switch; 6, power relay; 7, parking switch; 8, pilot lock; 9, speed sensor.

[0043] Through the above accompanying drawings, specific embodiments of this application have been shown, and there will be more detailed descriptions hereinafter. These accompanying drawings and written descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed Description of Specific Embodiments

[0044] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0045] In the description and claims of this application and the above-mentioned drawings, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0046] In the technical solution of this application, the processing of information such as financial data or user data, including collection, storage, use, processing, transmission, provision, and disclosure, complies with the provisions of relevant laws and regulations and does not violate public order and good customs.

[0047] It should be noted that in the embodiments of this application, some existing industry solutions such as certain software, components, models, etc. may be mentioned. They should be regarded as exemplary. The purpose is only to illustrate the feasibility in the implementation of the technical solution of this application, but it does not mean that the applicant has already or necessarily used this solution.

[0048] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data that have been authorized by the user or fully authorized by all parties. And the collection, use, and processing of relevant data need to comply with relevant laws, regulations, and standards, and corresponding operation entrances are provided for the user to choose to authorize or refuse.

[0049] The relay, engine starting control system and method, controller, and working machine of this application can be used in the field of mechatronics technology, and can also be used in any field other than the mechatronics technology field, such as the engine control technology field, etc. The application fields of the relay, engine starting control system and method, controller, and working machine of this application are not limited.

[0050] The relay, engine starting control system and method, controller, and working machine of this application can be applied to the scenario of engine starting control. Any relevant scenario involving engine starting, such as the scenario of vehicle engine starting, the scenario of construction machinery engine starting, etc., can apply the relay, engine starting control system and method, controller, and working machine of this application.

[0051] The starting of an engine refers to the process in which the starting motor of the engine rotates from the moment it is connected to the power supply until it reaches the rated speed.

[0052] In the related art, construction machinery and automobiles generally use a controller to drive a relay to control the S terminal of the engine starting motor to start the vehicle. The starting motor is a DC motor, and direct starting wear is generally used in the industry. At the moment when the relay is energized, the peak current can reach 135 A, and this current will impact the relay. Therefore, high requirements are imposed on the performance of the relay.

[0053] Figure 1 FIG. is a schematic structural diagram of a certain relay in the related art, as Figure 1 shown. The relay includes electrical connection points a, b, c, d, a coil, contact group A, and contact group B. Electrical connection point a is connected to electrical connection point c through the coil. Electrical connection point a is also grounded. Electrical connection point c is also connected to the controller 2. Electrical connection point b is connected to the battery 3. Electrical connection point b is also connected to contact group A. Contact group A is connected to contact group B. Contact group B is also connected to electrical connection point d. Electrical connection point d is also connected to the starting motor 4.

[0054] When the engine starts, the controller 2 outputs a signal to electrical connection point c to energize the coil. Energizing the coil causes contact group A and contact group B to be attracted respectively, enabling the battery 3 to supply power to the starting motor 4.

[0055] However, since both electrical connection point b and electrical connection point d are energized at this time, and there is a certain distance between the two contacts in contact group A / B before they are in contact, it may cause electric sparks or arcs between the two contacts. The electric sparks or arcs will erode the contacts, and in severe cases, it will cause the contacts to be unable to release and the relay to be unable to cut off, resulting in damage to the starting motor.

[0056] Based on the above technical problems, the inventive concept of the present application lies in: how to provide an engine starting control solution that can avoid the erosion of relay contacts and damage to the starting motor during the engine starting process.

[0057] An embodiment of the present application provides a relay, an engine starting control system and method, a controller, and a work machine. An electronic switch can be added between the first contact group of the relay and the battery, and the controller controls the closing state of the electronic switch. After detecting that the work machine meets the engine starting condition, the controller can output a signal to the fourth electrical connection point of the relay to energize the relay coil, so that the first contact group and the second contact group are each in an attracted state. During this process, since the electronic switch is in an open state, the first contact group and the second contact group are both in a de-energized state, and no electric spark or arc will be generated. After the first contact group and the second contact group are each in an attracted state, the controller will output a signal to the second electrical connection point to close the electronic switch, so that the battery supplies power to the starting motor through the closed electronic switch, the attracted first contact group and the second contact group, and the engine starting is completed. Through such a setting, the contacts can be attracted before being energized and separated after being de-energized during engine starting, avoiding the generation of electric sparks or arcs during the contact attraction process, thereby avoiding the ablation of the relay contacts and the damage of the starting motor during the engine starting process.

[0058] The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0059] Figure 2 is a schematic structural diagram of a relay according to an embodiment of the present application, as Figure 2 shown, the relay may include: a first electrical connection point 11, a second electrical connection point 12, a third electrical connection point 13, a fourth electrical connection point 14, a fifth electrical connection point 15, and a built-in relay coil 16, an electronic switch 17, a first contact group 18, and a second contact group 19.

[0060] The first electrical connection point 11 is connected to the first contact group 18, the first contact group 18 and the second contact group 19 are connected, the second contact group 18 is connected to the second electrical connection point 12 through the electronic switch 17, and the electronic switch 17 is also connected to the third electrical connection point 13.

[0061] The fourth electrical connection point 14 is connected to the relay coil 16, the relay coil 16 is also connected to the fifth electrical connection point 15, and the fifth electrical connection point 15 is grounded.

[0062] In this embodiment, the first contact group 18 / second contact group 19 may include two contacts, and these two contacts are attracted to each other when the relay coil 16 is energized and separated from each other when the relay coil 16 is de-energized.

[0063] In this embodiment, the first electrical connection point may also be connected to the starting motor, the second electrical connection point may also be connected to the controller, the third electrical connection point may also be connected to the storage battery, and the fourth electrical connection point may also be connected to the controller.

[0064] In this embodiment, those skilled in the art can flexibly set the specific type of the electronic switch 17, as long as the controller can control the closing of the electronic switch 17 by outputting a signal and control the disconnection of the electronic switch 17 by stopping outputting the signal.

[0065] In this embodiment, after detecting that the working machine meets the engine starting conditions, the controller may output a signal to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are each in a closed state. During this process, since the electronic switch is in an open state, both the first contact group and the second contact group are in a de-energized state and no electric spark or arc will be generated. After the first contact group and the second contact group are each in a closed state, the controller will output a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the closed state, and the engine starting is completed. Through such a setting, the relay can achieve the contact closing before getting energized and separating after de-energizing during engine starting, avoiding the generation of electric spark or arc during the contact closing process, thereby avoiding the ablation of the relay contacts and the damage of the starting motor during the engine starting process.

[0066] Figure 3 FIG. is a schematic structural diagram of an engine starting control system according to an embodiment of the present application, as Figure 3 shown, the engine starting control system includes: a starting switch 5, a starting motor 4, a controller 2, and a relay 1 as Figure 2 shown.

[0067] The starting switch 5 is electrically connected to the controller 2, and the starting motor 4 is connected to the first electrical connection point 11 of the relay 1.

[0068] The controller 2 is respectively connected to the second electrical connection point 12 and the fourth electrical connection point 14 of the relay 1, and the third electrical connection point 13 of the relay 1 is also connected to the storage battery 3.

[0069] In this embodiment, the starting motor 4 of the engine starting control system can be connected to the first electrical connection point 11 of the relay 1, and the first electrical connection point 11 is connected to the first contact group 18 built in the relay 1; the controller 2 is connected to the second electrical connection point 12 of the relay 1, and the second electrical connection point 12 is also connected to the second contact group 19 built in the relay 1 through the electronic switch 17. The first contact group 18 and the second contact group 18 are connected. The electronic switch 17 is also connected to the third electrical connection point 13 of the relay 1, and the third electrical connection point 13 of the relay 1 is also connected to the storage battery 3; the controller 2 is also connected to the fourth electrical connection point 14 of the relay 1, and the fourth electrical connection point 14 is also connected to the relay coil 16 built in the relay 1. The relay coil 16 is also connected to the fifth electrical connection point 15, and the fifth electrical connection point 15 is grounded.

[0070] In this embodiment, the start switch 5 can be electrically connected to the controller 2 to output a start signal or other signals to the controller 2.

[0071] In this embodiment, the controller 2 can be connected to the second electrical connection point 12 of the relay 1 to control the on-off state of the electronic switch 17 by outputting signals or stopping outputting signals.

[0072] In this embodiment, after detecting that the working machine meets the engine starting conditions, the controller can output a signal to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are each in the closed state. During this process, since the electronic switch is in the open state, the first contact group and the second contact group are both in the de-energized state and no electric spark or arc will be generated. After the first contact group and the second contact group are each in the closed state, the controller will output a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the closed state, and the engine starting is completed. Through such a setting, the relay can achieve the contact closing before getting energized and separating after power-off during engine starting, avoiding the generation of electric spark or arc during the contact closing process, thereby avoiding the ablation of the relay contacts and the damage of the starting motor during the engine starting process.

[0073] In a possible implementation manner, the controller 2 can also be respectively connected to the parking switch 7, the pilot lock 8 and the speed sensor 9 of the working machine.

[0074] In this embodiment, the controller can also be connected to the parking switch to obtain the on-off state of the parking switch; the controller can also be connected to the pilot lock to obtain the on-off state of the pilot lock; the controller can also be connected to the speed sensor to obtain the real-time speed of the engine.

[0075] In a possible implementation, the storage battery 3 can also be electrically connected to the start switch 5 and the controller 2 respectively.

[0076] In this implementation, the controller 2 can be directly connected to the storage battery 3. As Figure 2 shown, the controller 2 can also be connected to the storage battery 3 through a power relay 6. The power relay 6 can also be connected to the start switch 5. The operator can operate the start switch 5 to turn it to the ON position to send an ON signal (power-on signal) to the power relay 6. After the power relay 6 receives the ON signal, the coil inside it is energized and attracted, so that the storage battery 3 supplies power to the controller 2 through the power relay 6, enabling the controller 2 to be powered on.

[0077] In this implementation, the storage battery 3 can also be electrically connected to the start switch 5 and the controller 2 respectively to supply power to the start switch 5 and the controller 2.

[0078] Figure 4 is a flowchart of an engine start control method according to an embodiment of the present application. In this embodiment, the controller in Figure 3 is used to illustrate the engine start control method. As Figure 4 shown, the engine start control method can include the following steps:

[0079] S401: After it is detected that the working machine meets the engine start conditions, the controller outputs a signal to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are each in an attracted state.

[0080] In this embodiment, the working machine meeting the engine start conditions can be: the parking switch of the working machine is disconnected, the pilot lock is disconnected, the engine speed detected by the speed sensor is 0, and a start signal sent by the start switch is received. When the working machine meets all the above conditions, it can be considered that the engine can start.

[0081] In this embodiment, the controller can output an electrical signal to the fourth electrical connection point to energize the relay coil, so that the two contacts of the first contact group are attracted together and the two contacts of the second contact group are attracted together. During the attraction process, neither the first contact group nor the second contact group is energized.

[0082] S402: After a preset duration, the controller outputs a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the attracted state.

[0083] In this embodiment, the preset duration can be flexibly set by those skilled in the art according to the actual situation and is not limited here. As long as after the preset duration of the relay coil being energized, the first contact group and the second contact group are each in an attracted state.

[0084] In this embodiment, the controller can output an electrical signal to the second electrical connection point to close the electronic switch, thereby forming a power supply path between the storage battery, the electronic switch, the first contact group, the second contact group, and the starting motor, so that the storage battery can supply power to the starting motor to start the engine.

[0085] In this embodiment, after detecting that the working machine meets the engine starting condition, the controller can output a signal to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are each in an attracted state. During this process, since the electronic switch is in an open state, the first contact group and the second contact group are both in a de-energized state, and no electric spark or arc will be generated. After the first contact group and the second contact group are each in an attracted state, the controller will output a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the starting motor through the closed electronic switch, the attracted first contact group, and the second contact group, completing the start of the engine. Through such a setting, the relay can achieve the contact to be attracted before getting energized and separated after de-energization during engine starting, avoiding the generation of electric sparks or arcs during the contact attraction process, thereby avoiding the ablation of the relay contacts and the damage of the starting motor during the engine starting process.

[0086] In a possible implementation manner, after the controller in the above step S402 outputs a signal to the second electrical connection point to close the electronic switch, it may further include:

[0087] S11: After determining that the engine starting is completed, the controller stops outputting a signal to the second electrical connection point to disconnect the electronic switch, so that the storage battery stops supplying power, and the first contact group and the second contact group are de-energized.

[0088] S12: After a preset duration, the controller stops outputting a signal to the fourth electrical connection point to de-energize the relay coil, so that the first contact group and the second contact group are each in a separated state.

[0089] In this embodiment, the completion of engine starting may be that the engine speed reaches a predetermined value.

[0090] In this embodiment, the preset duration can be flexibly set by those skilled in the art according to the actual situation, and no limitation is made here. As long as after the preset duration when the electronic switch is disconnected, the first contact group and the second contact group are each in a de-energized state.

[0091] In this embodiment, after determining that the engine startup is completed, the controller may first stop outputting an electrical signal to the second electrical connection point to disconnect the electronic switch, so that the battery stops supplying power to the starting motor. At this time, both the first contact group and the second contact group lose power. After a preset duration from the disconnection of the electronic switch, the controller then stops outputting a signal to the fourth electrical connection point to de-energize the relay coil, so that the two contacts of the first contact group disengage and the two contacts of the second contact group disengage. During the disengagement process, since both the first contact group and the second contact group are in a de-energized state, no electric spark or arc will be generated. With such a setting, the relay can achieve the contact closing before power-on and disengagement after power-off after the engine startup ends, avoiding the generation of electric spark or arc during the contact closing process, thereby avoiding the ablation of the relay contacts and the damage of the starting motor during the engine startup process.

[0092] In a possible embodiment, the work machine in the above step S401 satisfying the engine startup condition may include:

[0093] The parking switch of the work machine is disconnected, the pilot lock is disconnected, the engine speed detected by the speed sensor is 0, and a startup signal sent by the startup switch is received.

[0094] In this embodiment,

[0095] In this embodiment, when the parking switch is disconnected, the pilot lock is disconnected, and the engine speed is 0, it indicates that the work machine is in a standby or shutdown state at this time. In this state, if the controller receives a startup signal sent by the startup switch, it can be explained that the work machine satisfies the engine startup condition and can control the engine to start.

[0096] In a possible embodiment, the method may further include:

[0097] Use the speed sensor to continuously detect the engine speed. When it is detected that the engine speed reaches a preset speed threshold, it is determined that the engine startup is completed.

[0098] In this embodiment, the preset speed threshold can be flexibly set by those skilled in the art according to the actual situation and is not limited here.

[0099] In this embodiment, after the engine starts, the controller can use the speed sensor to continuously detect the engine speed. When it is detected that the engine speed reaches a preset speed threshold, it can be determined that the engine startup is completed.

[0100] Next, a specific embodiment is used to elaborate on the application process of the engine startup control system of the present application.

[0101] In a specific embodiment, an operator wants to operate an excavator for work. First, the engine of the excavator needs to be started using the engine start control system. The specific process is as follows:

[0102] In the first step, the operator manipulates the start switch 5 in the engine start control system to turn it on to the ON position to send an ON signal (power-on signal) to the power relay 6. After the power relay 6 receives the ON signal, the coil inside it is energized and attracted, enabling the battery 3 to supply power to the controller 2 through the power relay 6, thus powering on the controller 2.

[0103] In the second step, the controller 2 detects that the parking switch of the excavator is off, the pilot lock is off, and the engine speed is 0. After receiving the start signal sent by the start switch 5, the controller 2 outputs a signal to the fourth electrical connection point 11 of the relay 1 to energize the relay coil 16, so that the first contact group 18 and the second contact group 19 are each in an attracted state. During this process, since the electronic switch is in the off state, both the first contact group and the second contact group are in a de-energized state and no electric sparks or arcs will be generated.

[0104] In the third step, after a certain period of time, the controller 2 outputs a signal to the second electrical connection point 12 of the relay 1 to close the electronic switch 17, enabling the battery 3 to supply power to the starting motor through the closed electronic switch 17, the attracted first contact group 18, and the second contact group 18.

[0105] In the fourth step, the controller 2 uses the speed sensor to continuously detect the engine speed. When it detects that the engine speed reaches the preset speed threshold, it determines that the engine start is completed.

[0106] In the fifth step, the controller 2 stops outputting a signal to the second electrical connection point 12 of the relay 1 to disconnect the electronic switch 17, causing the battery 3 to stop supplying power and the first contact group 18 and the second contact group 19 to lose power.

[0107] In the sixth step, after a certain period of time, the controller 2 stops outputting a signal to the fourth electrical connection point 14 of the relay 1 to de-energize the relay coil 16, so that the first contact group 18 and the second contact group 19 are each in a disengaged state. During this process, both the first contact group and the second contact group are in a de-energized state and no electric sparks or arcs will be generated.

[0108] Figure 5 The structural schematic diagram of the controller according to an embodiment of the present application is as Figure 5As shown in the figure, the controller includes: a suction module 51, which is configured to, after detecting that the working machine meets the engine start condition, output a signal by the controller to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are each in a suction state; a power-on module 52, which is configured to, after a preset time period, output a signal by the controller to the second electrical connection point to close the electronic switch, so that the battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the suction state.

[0109] The controller provided by the embodiment of the present application can execute the technical solutions shown in the above method embodiments, and its implementation principle and beneficial effects are similar, which will not be elaborated here.

[0110] Figure 6 It is a schematic structural diagram of a controller according to another embodiment of the present application. As Figure 6 shown in the figure, the controller includes: a processor 601, and a memory 602 communicatively connected to the processor 601; the memory 602 stores computer-executable instructions; the processor 601 executes the computer-executable instructions stored in the memory 602 to implement the steps of the engine start control method in the above various method embodiments.

[0111] In the above controller, the memory 602 and the processor 601 are directly or indirectly electrically connected to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines, such as being connected through a bus. The memory 602 stores computer-executable instructions for implementing the data access control method, including at least one software function module that can be stored in the memory 602 in the form of software or firmware. The processor 601 executes the software programs and modules stored in the memory 602 to perform various functional applications and data processing.

[0112] The memory 602 can be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electric Erasable Programmable Read-Only Memory (EEPROM), etc. Among them, the memory 602 is used to store programs, and after receiving an execution instruction, the processor 601 executes the program. Further, the software programs and modules in the memory 602 may also include an operating system, which may include various software components and / or drivers for managing system tasks (such as memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide a running environment for other software components.

[0113] The processor 601 can be an integrated circuit chip with signal processing capabilities. The above-mentioned processor 601 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0114] An embodiment of the present application further provides a work machine, which may include an Figure 3 engine starting control system as shown. The engine starting control system may include a start switch, a starter motor, a controller, and a Figure 2 relay as shown.

[0115] The relay includes a first electrical connection point, a second electrical connection point, a third electrical connection point, a fourth electrical connection point, a fifth electrical connection point, and a built-in relay coil, an electronic switch, a first contact group, and a second contact group.

[0116] The starting motor is connected to the first electrical connection point, and the first electrical connection point is also connected to the first contact group; the controller is connected to the second electrical connection point, and the second electrical connection point is also connected to the second contact group through an electronic switch. The first contact group and the second contact group are connected. The electronic switch is also connected to the third electrical connection point, and the third electrical connection point is also connected to the storage battery; the controller is also connected to the fourth electrical connection point, the fourth electrical connection point is also connected to the relay coil, the relay coil is also connected to the fifth electrical connection point, and the fifth electrical connection point is grounded.

[0117] The controller is configured to output a signal to the fourth electrical connection point to energize the relay coil after detecting that the working machine meets the engine starting condition, so that the first contact group and the second contact group are each in a closed state; after a preset time period, output a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the closed state.

[0118] In this embodiment, after detecting that the working machine meets the engine starting condition, the controller can output a signal to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are each in a closed state. During this process, since the electronic switch is in an open state, both the first contact group and the second contact group are in a de-energized state, and no electric spark or arc will be generated. After the first contact group and the second contact group are each in a closed state, the controller will output a signal to the second electrical connection point to close the electronic switch, so that the storage battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the closed state, and the engine starting is completed. Through such a setting, the relay can achieve the contact closing before getting energized and separating after de-energizing during engine starting, avoiding the generation of electric spark or arc during the contact closing process, thereby avoiding the ablation of the relay contacts and the damage of the starting motor during the engine starting process.

[0119] An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the steps of the method embodiments of the present application.

[0120] An embodiment of the present application further provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the steps of the method embodiments of the present application.

[0121] It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence, because according to this application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0122] It should be further noted that although the steps in the flowchart are shown in sequence according to the indication of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0123] It should be understood that the above device embodiments are only illustrative, and the devices of this application can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units, modules or components can be combined, or can be integrated into another system, or some features can be ignored or not executed.

[0124] In addition, without special explanation, in each embodiment of this application, each functional unit / module can be integrated in one unit / module, or each unit / module can exist physically alone, or two or more units / modules can be integrated together. The above integrated unit / module can be implemented in the form of hardware or in the form of a software program module.

[0125] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0126] Other embodiments of the present application will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present application are pointed out by the appended claims.

[0127] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A relay, characterized in that: include: A first electrical connection point, a second electrical connection point, a third electrical connection point, a fourth electrical connection point, a fifth electrical connection point, and a built-in relay coil, an electronic switch, a first contact group, and a second contact group; The first electrical connection point is connected to the first contact group, the first contact group is connected to the second contact group, the second contact group is connected to the second electrical connection point via the electronic switch, and the electronic switch is also connected to the third electrical connection point; The fourth electrical connection point is connected to the relay coil, the relay coil is further connected to the fifth electrical connection point, and the fifth electrical connection point is grounded.

2. An engine starting control system, characterized in that: include: A starting switch, a starting motor, a controller and a relay as claimed in claim 1; The start switch is electrically connected to the controller, and the start motor is connected to the first electrical connection point of the relay; The controller is connected to the second electrical connection point and the fourth electrical connection point of the relay respectively, and the third electrical connection point of the relay is also connected to the battery.

3. The engine start control system according to claim 2, characterized in that: The controller is also connected to a parking switch, a pilot lock and a rotation speed sensor of the operating machine respectively.

4. The engine start control system according to claim 2, characterized in that: The storage battery is also electrically connected to the start switch and the controller respectively.

5. An engine start control method, applied to the engine start control system according to any one of claims 2 to 4, characterized in that: include: After detecting that the working machine meets the engine start condition, the controller outputs a signal to the fourth electrical connection point to energize the relay coil, so that the first contact group and the second contact group are respectively in an energized state; After a preset time, the controller outputs a signal to the second electrical connection point to close the electronic switch, so that the battery supplies power to the starter motor through the closed electronic switch, the first contact group and the second contact group in the attracted state.

6. The engine start control method according to claim 5, characterized in that: After the controller outputs a signal to the second electrical connection point to close the electronic switch, the method further includes: After determining that the engine start is completed, the controller stops outputting signals to the second electrical connection point to disconnect the electronic switch, so that the battery stops supplying power, and the first contact group and the second contact group lose power; After a preset time, the controller stops outputting signals to the fourth electrical connection point to de-energize the relay coil, so that the first contact group and the second contact group are respectively in a disengaged state.

7. The engine start control method according to claim 5, characterized in that: The working machine meets the engine start conditions, including: The parking switch of the working machine is turned off, the pilot lock is turned off, the engine speed detected by the speed sensor is 0, and the start signal sent by the start switch is received.

8. The engine start control method according to claim 6, characterized in that: Also includes: The engine speed is detected in real time using a speed sensor, and when it is detected that the engine speed reaches a preset speed threshold, it is determined that the engine start is completed.

9. A controller, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory is used to store computer-executable instructions; The processor is used to execute the computer-executable instructions stored in the memory, so that the processor executes the engine start control method according to any one of claims 5 to 8.

10. A working machine, characterized in that: include: The engine starting control system as claimed in claim 2, wherein the engine starting control system comprises a starting switch, a starting motor, a controller and a relay; The relay comprises a first electrical connection point, a second electrical connection point, a third electrical connection point, a fourth electrical connection point, a fifth electrical connection point, and a built-in relay coil, an electronic switch, a first contact group, and a second contact group; The starter motor is connected to the first electrical connection point, which is also connected to the first contact group; the controller is connected to the second electrical connection point, which is also connected to the second contact group through the electronic switch, the first contact group is connected to the second contact group, the electronic switch is also connected to the third electrical connection point, and the third electrical connection point is also connected to the battery; the controller is also connected to the fourth electrical connection point, which is also connected to the relay coil, which is also connected to the fifth electrical connection point, and the fifth electrical connection point is grounded; The controller is used to output a signal to the fourth electrical connection point to energize the relay coil after detecting that the working machine meets the engine starting conditions, so that the first contact group and the second contact group are each in an attracted state; after a preset time period, output a signal to the second electrical connection point to close the electronic switch, so that the battery supplies power to the starting motor through the closed electronic switch, the first contact group and the second contact group in the attracted state.

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