Control method and control system for automatic power-off of engineering machinery and engineering machinery

Abstract

The invention discloses a control method and a control system for automatic power-off of engineering machinery and the engineering machinery, the control method comprises a main control system and an automatic power-off control system, the main control system judges the running state of an engine according to collected engine running signals, and the running state of the engine is a starting state or a shutdown state; if the motion state of the engine is a shutdown state; the control system obtains an automatic power-off control system signal; if the main control system can obtain a signal of the automatic power-off control system; the main control system obtains the system voltage and / or the working state of the electric equipment; if the system voltage acquired by the main control system is lower than a voltage threshold value set by the system and / or the electric equipment does not perform any operation in a set time period; the automatic power-off control system reminds a user to start charging of the whole machine in time and waits for response of the user; and if the user does not respond within the set time, the main control system outputs a power-off instruction, and the whole machine is controlled to be powered off when the engine is not started.

Description

Technical Field

[0001] The present invention relates to the field of engineering machinery, and in particular to a control method and control system for automatic power-off of engineering machinery, and the engineering machinery. Background Art

[0002] At present, the automatic power-off of construction machinery mainly considers that after the engine is running, the engine will be automatically idled or shut down after a key shutdown command to reduce the risk of battery power failure. In the prior art, common automatic power-off has the following situations:

[0003] (1) The current idle shutdown function requires that the engine automatically shuts down after the engine is started and meets specific conditions and lasts for a set delay. The power to the entire machine is cut off after a certain delay. (2) During engine operation, the one-button start-stop system can be used to shut down the engine with one button. The engine is stopped through the shutdown relay or shutdown message. The power to the entire machine is cut off after a certain delay. (3) During engine operation, the one-button start-stop system can be used to manually turn the "ON" to "OFF" external switch. The engine is shut down and the power to the entire machine is cut off after a delay of several seconds. (4) When the entire machine is powered on and the engine is not started, if the power to the entire machine is to be turned off, the one-button start-stop system can only be used to turn the "ON" to "OFF" external switch. The power to the entire machine is cut off after a delay of several seconds.

[0004] Through the description and analysis of the above situation, when the whole machine is powered on and the engine is not started, if someone neglects to turn the one-button start external switch from "ON" to "OFF", the generator is not working, and the electrical equipment of the whole machine is powered on for a long time, consuming battery power until the battery is completely depleted, resulting in the whole machine being unable to power on / start normally next time, causing great inconvenience to the user. Summary of the invention

[0005] In order to overcome at least one of the defects of the above-mentioned prior art, the present invention provides a control method for automatic power-off of construction machinery. By adding an automatic power-off control system and combining it with a main control system, the whole machine can be powered off when the whole machine is powered on but the engine is not started.

[0006] In order to overcome at least one of the defects described in the above-mentioned prior art, the present invention also provides a control system for automatic power-off of construction machinery, which realizes power-off of the entire machine when the entire machine is powered on but the engine is not started through multi-way control of the main power relay.

[0007] In order to overcome at least one of the defects of the above-mentioned prior art, the present invention also provides an engineering machinery, which is applied with the aforementioned control system, so that the engineering machinery can automatically power off the whole machine when the engine is not started, thereby avoiding battery power consumption.

[0008] The technical solution adopted by the present invention to solve the problem is:

[0009] A control method for automatic power-off of an engineering machine, comprising a main control system and an automatic power-off control system, wherein the automatic power-off control system is connected to the main control system by signals;

[0010] The automatic power-off control method comprises the following steps:

[0011] S1. The main control system determines the operating state of the engine according to the collected engine operating signal, and the operating state of the engine is the starting state or the stopping state;

[0012] If the engine is in a stopped state, the process proceeds to step S2;

[0013] S2. The main control system obtains the automatic power-off control system signal;

[0014] If the main control system can obtain the signal of the automatic power-off control system, the following step S3 is entered;

[0015] S3. The main control system obtains the system voltage and / or the working status of the electrical equipment;

[0016] If the system voltage acquired by the main control system is lower than the voltage threshold set by the system and / or the electrical equipment has not performed any operation within the set time period, the following step S4 is entered;

[0017] S4. The automatic power-off control system reminds the user to start charging the whole device in time and waits for the user's response;

[0018] If the user does not respond within the set time, the main control system outputs a power-off command to control the entire machine to power off.

[0019] Furthermore, the engine operation signal includes a crankshaft position sensor signal, a camshaft position sensor signal, an ignition signal, a cylinder identification signal, an ignition feedback signal, an air flow sensor signal, a vehicle speed sensor signal, an oxygen sensor signal or an intake temperature sensor signal.

[0020] Furthermore, in step S3, if the user responds within the set time, the process returns to step S1.

[0021] Further, in step S2, the main control system obtains an automatic power-off control system signal;

[0022] If the main control system cannot obtain the signal of the automatic power-off control system, the following step S5 is entered;

[0023] S5. The main control system obtains the system voltage;

[0024] If the system voltage acquired by the main control system is lower than the voltage threshold set by the system, the process proceeds to step S4;

[0025] If the system voltage acquired by the main control system is not lower than the voltage threshold set by the system, the following step S6 is entered;

[0026] S6. The system remains powered on.

[0027] Furthermore, in step S1, if the running state of the engine is the starting state, the following step S7 is entered;

[0028] S7. The main control system obtains that the engine is started and is in an idle state, and at the same time determines the relationship between the engine idle state time and the set time;

[0029] If the engine idle time is less than the set time, the main control system will not make any other responses;

[0030] If the engine idling time is greater than the set time, then go to step S8;

[0031] S8. Main control system configuration shutdown message;

[0032] If the shutdown message configuration is successful, the process goes to step S9 and the whole machine is automatically powered off;

[0033] If the shutdown message configuration is unsuccessful, the process goes to step S10 and the entire machine is automatically powered off.

[0034] Further,

[0035] S9. The main control system sends a shutdown message to the engine ECM, the engine executes the shutdown command, and then the main control system obtains and determines the relationship between the engine speed and the set speed; if the engine speed remains lower than the set speed within the set time period, or the message fed back by the engine is a shutdown state, the main controller system sends a shutdown completion mark to the engine ECM, and then the main controller continues to send a shutdown switch message to the engine, and completes the automatic power-off of the entire machine after the set time.

[0036] Furthermore, S10. the main control system controls the shutdown relay, and then the main control system obtains and determines the relationship between the engine speed and the set speed; if the engine speed remains lower than the set speed within the set time period, or the message sent by the main control system to the engine is a shutdown state, the main control system sends a shutdown completion mark to the engine ECM, and completes automatic power-off of the entire machine after the set time.

[0037] A control system for automatic power-off of engineering machinery, comprising a main power switch, a battery, a key switch, an automatic shutdown relay, a main power relay, an automatic power-off controller, an engine shutdown relay, an engine controller and a main controller, wherein the main controller and the automatic power-off controller are signal-conducting; the main power switch, the battery and the key switch are connected in series in sequence;

[0038] The automatic stop relay has a first contact, a second contact, a third contact and a fourth contact, a first normally open path is formed between the second contact and the third contact, a first normally closed path is formed between the second contact and the fourth contact, and the first contact is electrically connected to the electromagnet in the automatic stop relay;

[0039] The first contact and the second contact are electrically connected to the main controller and the key switch respectively, and the third contact and the fourth contact are electrically connected to the engine relay and the main power supply relay respectively;

[0040] The main power relay has a fifth contact, a sixth contact and a seventh contact, a conductive path is formed between the fifth contact and the sixth contact, the fifth contact and the sixth contact are electrically connected to the battery and the automatic power-off controller respectively, the seventh contact is electrically connected to the electromagnet in the main power relay, and the seventh contact is also electrically conductive with the fourth contact and the main controller, and forms a conductive path from the fourth contact to the seventh contact.

[0041] Furthermore, the engine shutdown relay includes an eighth contact, a ninth contact and a tenth contact, a conductive path is formed between the eighth contact and the ninth contact, the eighth contact is electrically connected to the key switch, the ninth contact is electrically connected to the engine controller, and the tenth contact is electrically connected to the electromagnet in the engine relay.

[0042] An engineering machine comprises the aforementioned automatic power-off control system for the engineering machine.

[0043] In summary, the control method for automatic power-off of construction machinery provided by the present invention has the following technical effects:

[0044] By adding an automatic power-off control system to the construction machinery, the main control system obtains the signal obtained by the automatic power-off control system, and after meeting certain voltages or conditions, the main control system outputs a power-off command to control the power-off of the entire machine, so that the construction machinery can be powered on but the engine is not started, and the entire machine can be automatically powered off. This avoids the need to manually power off the machine when the engine is not started, avoids the situation where the entire machine is not powered off for a long time due to the operator's forgetfulness, avoids the problem of the entire machine's battery being exhausted and unable to work, and avoids the battery's over-discharge resulting in a reduction in service life, thereby ensuring that the starting system of the entire machine is in a healthy state of use.

[0045] In summary, the control system for automatic power-off of engineering machinery provided by the present invention has the following technical effects:

[0046] By setting up an automatic shutdown relay and realizing multi-channel control of the main power relay, the construction machinery can be powered on but the whole machine can be automatically powered off when the engine is not started. This avoids the need to manually power off the machine when the engine is not started, avoids the situation where the whole machine is not powered off for a long time due to the operator's forgetfulness, and avoids the problem of the whole machine failing to work due to battery exhaustion.

[0047] In summary, the engineering machinery provided by the present invention has the following technical effects:

[0048] The aforementioned automatic power-off control system for engineering machinery is applied in this engineering machinery, so that the engineering machinery can automatically power off the entire vehicle when the entire vehicle is powered on but the engine is not started, thereby avoiding the battery being in working condition for a long time and avoiding the battery being exhausted, which affects the operation of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The present invention is a control logic diagram of the control method for automatically powering off engineering machinery when the engine is not started.

[0050] Figure 2 This is a control logic diagram of the automatic power-off control method for engineering machinery of the present invention when the engine is started.

[0051] Figure 3 The present invention is a circuit diagram of an embodiment of a control system for automatic power-off of engineering machinery.

[0052] The meanings of the reference numerals are as follows:

[0053] 1. Key switch; 2. Main controller; 3. Automatic shutdown relay; 4. Engine shutdown relay; 5. Automatic power-off controller; 6. Main power relay. DETAILED DESCRIPTION

[0054] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0055] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0057] A control method for automatic power-off of engineering machinery comprises a main control system and an automatic power-off control system, wherein the automatic power-off control system is connected with the main control system by signals.

[0058] The automatic power-off control method comprises the following steps:

[0059] S1. The main control system determines the operating state of the engine according to the collected engine operating signal. The operating state of the engine is a start state or a stop state.

[0060] If the engine is in a stopped state, the process proceeds to the following step S2.

[0061] S2. The main control system obtains the automatic power-off control system signal.

[0062] If the main control system can obtain the signal of the automatic power-off control system, the process proceeds to the following step S3.

[0063] S3. The main control system obtains the system voltage and / or the working status of the electrical equipment.

[0064] If the system voltage acquired by the main control system is lower than the voltage threshold set by the system and / or the electrical equipment has not performed any operation within the set time period, the process proceeds to the following step S4.

[0065] S4. The automatic power-off control system reminds the user to start charging the whole device in time and waits for the user's response.

[0066] If the user does not respond within the set time, the main control system outputs a power-off command to control the entire machine to power off.

[0067] In the above scheme, an automatic power-off control system is added, and the automatic power-off control system is connected to the main control system by signal. The main control system obtains a response signal from the automatic power-off control system to remind the user to start charging the whole machine in time, or if there is no response signal, the main control system implements automatic power-off control. This solves the problem in the prior art that the whole machine cannot be automatically powered off when the whole machine is powered on but the engine is not started. This effectively avoids the battery running out of power and affecting the whole vehicle operation of the construction machinery.

[0068] In the technical solution, the engine operation signal includes a crankshaft position sensor signal, a camshaft position sensor signal, an ignition signal, a cylinder identification signal, an ignition feedback signal, an air flow sensor signal, a vehicle speed sensor signal, an oxygen sensor signal or an intake air temperature sensor signal. It is convenient to obtain information about the engine's motion state and avoid the problem of controlling the whole machine to power off when the engine is running.

[0069] In this technical solution, in step S3, if the user responds within the set time, the process returns to step S1. That is, after the main control system obtains the user response signal sent by the automatic power-off control system, it indicates that the whole machine is about to proceed to the next step and will not enter the shutdown or automatic power-off operation, so it returns to S1 to wait.

[0070] In this technical solution, in step S2, the main control system obtains an automatic power-off control system signal.

[0071] If the main control system cannot obtain the signal of the automatic power-off control system, the process proceeds to the following step S5.

[0072] S5. The main control system obtains the system voltage.

[0073] If the system voltage acquired by the main control system is lower than the voltage threshold set by the system, the process proceeds to step S4.

[0074] If the system voltage acquired by the main control system is not lower than the voltage threshold set by the system, the process proceeds to the following step S6.

[0075] S6. The system remains powered on.

[0076] In the present technical solution, in step S1, if the running state of the engine is the starting state, the process proceeds to the following step S7.

[0077] S7. The main control system obtains that the engine is started and is in an idle state, and at the same time determines the relationship between the time the engine is in the idle state and the set time.

[0078] If the engine idle time is less than the set time, the main control system will not make any other responses.

[0079] If the engine idling time is greater than the set time, the process proceeds to step S8.

[0080] S8. The main control system configures the shutdown message.

[0081] If the shutdown message configuration is successful, the process goes to step S9 and the entire machine is automatically powered off.

[0082] If the shutdown message configuration is unsuccessful, the process goes to step S10 and the entire machine is automatically powered off.

[0083] In this technical solution, S9. The main control system sends a shutdown message to the engine ECM, and the engine executes the shutdown command. The main control system continues to send a shutdown mark to the engine ECM according to the engine speed value or the shutdown status fed back by the engine. Then the main control system continues to send a shutdown switch message to the engine, and completes automatic power-off of the entire machine after the set time.

[0084] In this technical solution, S10. The main control system controls the shutdown relay, and then the main controller obtains and determines the relationship between the engine speed and the set speed. If the engine speed remains lower than the set speed within the set time period, or the message sent by the main control system to the engine is a shutdown state, the main controller sends a shutdown completion mark to the engine, and the entire machine is automatically powered off after the set time. In this solution, if one of the methods is met, it is considered that the engine has been turned off, and the main control system controls the shutdown relay signal to be cleared.

[0085] In the technical solution, a control system for automatic power-off of engineering machinery includes a main power switch, a battery, a key switch, an automatic shutdown relay, a main power relay, an automatic power-off controller, an engine shutdown relay, an engine controller and a main controller, wherein the main controller and the automatic power-off controller are signal-conducting. The main power switch, the battery and the key switch are connected in series in sequence.

[0086] The automatic shutdown relay has a first contact a, a second contact b, a third contact c and a fourth contact d, a first normally open path is formed between the second contact b and the third contact c, a first normally closed path is formed between the second contact b and the fourth contact d, and the first contact a is electrically connected to the electromagnet in the automatic shutdown relay.

[0087] The first contact a and the second contact b are electrically connected to the main controller and the key switch, respectively, and the third contact c and the fourth contact d are electrically connected to the engine relay and the main power relay, respectively.

[0088] The main power relay has a fifth contact e, a sixth contact f and a seventh contact g, a conductive path is formed between the fifth contact e and the sixth contact f, the fifth contact e and the sixth contact f are electrically connected to the battery and the automatic power-off controller respectively, the seventh contact g is electrically connected to the electromagnet in the main power relay, and the seventh contact g is also electrically connected to the fourth contact d and the main controller, and forms a conductive path from the fourth contact d to the seventh contact g.

[0089] Based on the above solution, an automatic power-off controller is added to the vehicle, and a switch for controlling the automatic power-off controller is added to the dashboard of the vehicle, and the default state is set to the on state. When starting the construction machinery, the vehicle is powered on by the key switch, but the engine is not started. At this time, if no other operations or responses are continued, the vehicle will automatically power off after a certain period of time or when certain conditions are met to avoid battery exhaustion.

[0090] When the main controller 2 detects the voltage value and the battery voltage of the whole machine by connecting to the power port,

[0091] If the voltage of the system is lower than the set threshold or the electrical equipment (air conditioner, radio, throttle knob, working mode, electric pilot valve) has not been operated for a set period of time, the automatic power-off controller 5 will prompt the user to start charging the whole machine in time. If the prompt is not responded to by the user, the main controller 2 will output a power-off instruction and can also cut off the high-power equipment of the whole machine, such as air conditioner. After the automatic shutdown relay 3 is energized, the first normally open path of the automatic shutdown relay is closed, so that the automatic shutdown relay 3 is continuously energized, and the first normally closed path is disconnected, cutting off the circuit path of the key switch 1 controlling the main power relay 6; after the delay setting time, the main controller 2 stops the output of the main power relay 6 to complete the automatic power-off of the whole machine.

[0092] Of course, the circuit of the control system for automatic power-off of the above-mentioned construction machinery can also perform the automatic power-off operation of the whole vehicle when the whole machine is powered on and the engine is in an idling state. In the control system for automatic power-off of the above-mentioned construction machinery, the engine stop relay includes an eighth contact h, a ninth contact i and a tenth contact j, a conductive path is formed between the eighth contact h and the ninth contact i, the eighth contact h is electrically connected to the key switch, the ninth contact i is electrically connected to the engine controller, and the tenth contact j is electrically connected to the electromagnet in the engine relay.

[0093] Based on the above scheme, when the whole machine is in the startup state and the idle stop condition is met, the main controller 2 outputs an idle stop command to the automatic stop relay 3, the automatic stop relay 3 is energized, the first normally open path of the automatic stop relay is closed, so that the automatic stop relay 3 is continuously energized, the first normally closed path is disconnected, and the circuit path of the key switch 1 controlling the main power relay 6 is cut off. At the same time, the engine stop relay 4 is energized, cutting off the engine controller ECM, and realizing the automatic shutdown of the engine. After the delay setting time, the main controller 2 stops outputting instructions to the main power relay, and completes the automatic power off of the whole machine.

[0094] In the technical solution, a construction machine includes the aforementioned control system for automatic power-off of the construction machine, so that the construction machine can automatically power off the whole vehicle when the whole vehicle is powered on but the engine is not started, so as to avoid the battery being in working state for a long time and the battery being exhausted, which affects the whole vehicle operation of the construction machine.

[0095] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. 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, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A control method for automatically powering off a construction machinery, characterized in that: It includes a main control system and an automatic power-off control system, wherein the automatic power-off control system is connected to the main control system by signal; The automatic power-off control method comprises the following steps: S1. The main control system determines the operating state of the engine according to the collected engine operating signal, and the operating state of the engine is the starting state or the stopping state; If the engine is in a stopped state, the following step S2 is performed; S2. The main control system obtains the automatic power-off control system signal; If the main control system can obtain the signal of the automatic power-off control system, the following step S3 is entered; S3. The main control system obtains the system voltage and / or the working status of the electrical equipment; If the system voltage acquired by the main control system is lower than the voltage threshold set by the system and / or the electrical equipment has not performed any operation within the set time period, the following step S4 is entered; S4. The automatic power-off control system reminds the user to start charging the whole device in time and waits for the user's response; If the user does not respond within the set time, the main control system outputs a power-off command to control the entire machine to power off.

2. The control method for automatic power-off of construction machinery according to claim 1, characterized in that: Engine operation signals, including crankshaft position sensor signals, camshaft position sensor signals, ignition signals, cylinder identification signals, ignition feedback signals, air flow sensor signals, vehicle speed sensor signals, oxygen sensor signals or intake air temperature sensor signals.

3. The control method for automatic power-off of construction machinery according to claim 1, characterized in that: In step S3, if the user responds within the set time, the process returns to step S1.

4. The control method for automatic power-off of construction machinery according to claim 1, characterized in that: In step S2, the main control system obtains an automatic power-off control system signal; If the main control system cannot obtain the signal of the automatic power-off control system, the following step S5 is entered; S5. The main control system obtains the system voltage; If the system voltage acquired by the main control system is lower than the voltage threshold set by the system, the process proceeds to step S4; If the system voltage acquired by the main control system is not lower than the voltage threshold set by the system, the following step S6 is entered; S6. The system remains powered on.

5. The control method for automatic power-off of construction machinery according to claim 1, characterized in that: In step S1, if the running state of the engine is the starting state, then enter the following step S7; S7. The main control system obtains that the engine is started and is in an idle state, and at the same time determines the relationship between the engine idle state time and the set time; If the engine idle time is less than the set time, the main control system will not make any other responses; If the engine idling time is greater than the set time, then go to step S8; S8. Main control system configuration shutdown message; If the shutdown message configuration is successful, the process goes to step S9 and the whole machine is automatically powered off; If the shutdown message configuration is unsuccessful, the process goes to step S10 and the entire machine is automatically powered off.

6. The control method for automatic power-off of construction machinery according to claim 5, characterized in that: S9. The main control system sends a shutdown message to the engine ECM, the engine executes the shutdown command, and then the main control system obtains and determines the relationship between the engine speed and the set speed; if the engine speed remains lower than the set speed within the set time period, or the message fed back by the engine is a shutdown state, the main controller system sends a shutdown completion mark to the engine ECM, and then the main controller continues to send a shutdown switch message to the engine, and completes the automatic power-off of the entire machine after the set time.

7. The control method for automatic power-off of construction machinery according to claim 5, characterized in that: S10. The main control system controls the shutdown relay, and then the main control system obtains and determines the relationship between the engine speed and the set speed; if the engine speed remains lower than the set speed within the set time period, or the message sent by the main control system to the engine is a shutdown state, the main control system sends a shutdown completion mark to the engine ECM, and completes automatic power-off of the entire machine after the set time.

8. A control system for automatic power-off of construction machinery, characterized in that: It includes a main power switch, a battery, a key switch, an automatic shutdown relay, a main power relay, an automatic power-off controller, an engine shutdown relay, an engine controller and a main controller, wherein the main controller and the automatic power-off controller are signal-conducting; the main power switch, the battery and the key switch are connected in series in sequence; The automatic stop relay has a first contact, a second contact, a third contact and a fourth contact, a first normally open path is formed between the second contact and the third contact, a first normally closed path is formed between the second contact and the fourth contact, and the first contact is electrically connected to the electromagnet in the automatic stop relay; The first contact and the second contact are electrically connected to the main controller and the key switch respectively, and the third contact and the fourth contact are electrically connected to the engine relay and the main power supply relay respectively; The main power relay has a fifth contact, a sixth contact and a seventh contact, a conductive path is formed between the fifth contact and the sixth contact, the fifth contact and the sixth contact are electrically connected to the battery and the automatic power-off controller respectively, the seventh contact is electrically connected to the electromagnet in the main power relay, and the seventh contact is also electrically conductive with the fourth contact and the main controller, and forms a conductive path from the fourth contact to the seventh contact.

9. The control system for automatic power-off of construction machinery according to claim 8, characterized in that: The engine stop relay includes an eighth contact, a ninth contact and a tenth contact, a conductive path is formed between the eighth contact and the ninth contact, the eighth contact is electrically connected to the key switch, the ninth contact is electrically connected to the engine controller, and the tenth contact is electrically connected to the electromagnet in the engine relay.

10. An engineering machine, characterized in that: A control system for automatically powering off construction machinery comprising the control system as described in any one of claims 8 or 9.

Images