TWI729347B - Engine idle and shutdown controlling device and method thereof - Google Patents

Abstract

The present invention relates to an engine idle and shutdown controlling device, which arranged on a locomotive with an engine, includes an engine control unit and an idle/shutdown switcher. The engine control unit includes a speed sensor, an engine speed sensor, a throttle valve opening sensor, a voltage sensor, a temperature sensor and an idle/shutdown brake switch. When the engine stands at a running state, and the locomotive operation mode is in the idle speed automatic shutdown mode, and meets the following conditions: the voltage sensor measured voltage greater than a predetermined voltage, the temperature sensor measured at a temperature greater than a predetermined temperature, the speed sensor measured speed less than a predetermined speed, the engine speed sensor measured engine speed less than a predetermined speed, the throttle valve opening sensor measured by the throttle valve opening is less than a predetermined opening, and the idle/shutdown brake switch is at start state, the engine control unit will stop the fuel injection and ignition to make the engine shutdown.

Description

Engine idle speed stop control device and method

The invention relates to an engine idling stop control device and method, and particularly to an engine idling stop control device and method suitable for locomotive engines.

Currently on the market, in response to regulatory requirements, locomotive engines must be in a zero-emission state at idling speed, so depots have installed idling stop control devices on locomotives. Nowadays, locomotive engine idling stop devices are stopped for a certain period of time (mostly set by depots to 3 to 5 seconds) The rear engine is automatically turned off, and the engine is automatically started after operating the throttle. Some riders think that the waiting time is too short, and some riders think that the waiting time is too long, and the car factory has the instrument for the rider to set this waiting time.

Please refer to Figure 1 and Figure 2, which are the system architecture diagram and control flow diagram of the conventional engine idling stop control device, respectively. As shown in FIG. 1, the engine idling stop control device is assembled on a locomotive with an engine 910, and includes: an engine control unit 920, an idling stop control unit 940, and an idle stop switch 930. Among them, the engine control unit 920 has a vehicle speed sensor 921 for measuring the traveling speed of a locomotive, an engine speed sensor 922 for measuring the engine 910, a throttle valve opening sensor 923 for measuring the throttle valve of the locomotive, A temperature sensor 924 for measuring the temperature of the cylinder head of a locomotive and a voltage sensor 925 for detecting the battery of the locomotive.

The idle speed stop control unit 940 is electrically connected to the engine control unit 920 and the idle speed stop switch 930, and the idle speed stop control unit 940 has a timer 941. In addition, the idling stop switch 930 is used to select and control the locomotive operation mode as idling automatic stop or no-idle automatic stop; when the idle stop switch 930 is in the no-idle automatic stop operation mode, the idling stop control unit 940 does not output anything Control the signal that the engine 910 stalls.

As shown in FIG. 2, when the engine 910 is in the engine starting state, the idle speed stop control method includes the following steps (S1): Determine whether the idle speed stop switch 930 is in the idle speed automatic stop operation mode, if so, its idle speed stop indicator light at this time If it is ON, proceed to the next step, if not, proceed directly to step (S7). Next, step (S2) determines whether the battery voltage measured by the voltage sensor 925 is greater than a predetermined voltage and the cylinder head temperature measured by the temperature sensor 924 is greater than a predetermined temperature, if yes, proceed to the next step, if not , Then go directly to step (S7). Next, step (S3) determines whether the vehicle speed measured by the vehicle speed sensor 921 is less than a predetermined vehicle speed, whether the engine 910 speed measured by the engine speed sensor 922 is less than a predetermined speed, and whether the throttle opening sensor 923 is Whether the measured throttle valve opening is less than a predetermined opening (SB), if all are yes, execute the next step, if not, go directly to step (S7).

Next, in step (S4), the timer 941 starts counting time. After that, it is determined (S5) whether the vehicle speed sensor 921, the engine speed sensor 922, and the throttle opening sensor 923 measured by the timer 941 meet the duration of step (S3) for more than a predetermined time (SD), if yes , At this time, the idle speed flameout indicator is flashing, then execute the next step, if not, go directly to step (S7). Next, in step (S6), the idling stop control unit 940 outputs a signal to control the engine 910 to stop. In addition, in step (S7), the idling stop control unit 940 does not output any signal, and the engine 910 remains in the starting state. The stalled state of the engine 910 in step (S6) indicates that the idling stall mechanism is established; the non- stalled state of the engine 910 in step (S7) indicates that the idling stall mechanism is not established.

As mentioned above, when the locomotive stops idling at a red light, the timer 941 still needs to start timing. After the idling conditions are met and maintained for a predetermined time, the engine 910 will automatically turn off. If the predetermined time is too long, the locomotive will be lost. The zero-emission state function must be implemented at idling speed. Because the locomotive engine 910 is still running for the predetermined time and has not automatically turned off, there is still exhaust gas being discharged, which is not very ideal, and there is still room for improvement.

In addition, Keihin Corporation of Japan also filed a patent for the risk of "automatically stalling" locomotives at idle speed. The feature of the patent is to use the brakes to determine whether the rider is in control of the locomotive. If this locomotive does not operate the brakes, it means that the locomotive is no longer in control, and the function of operating the accelerator to start the engine will be cancelled after a certain period of time. The advantage of this patent is that the rider who operates the brake must sit on the locomotive and know that the locomotive is waiting to be started. To avoid the danger of the engine suddenly starting while the locomotive is waiting, the disadvantage is that the rider must continue to operate the brakes while stopping, so that the locomotive can maintain the engine idling stop and restart function, which is very inconvenient, not ideal, and there is room for improvement.

This is the reason for the inventor. Based on the spirit of active invention and creation, he eagerly thought of an "engine idling stop control device and method" that could solve the above-mentioned problems. After several research experiments, the invention was finally completed.

The present invention proposes a locomotive engine idling stop control device that can directly reflect the will of the rider. When the engine is in the idling state and the rider decides to stop, the stop brake switch can be directly braked and pressed to prompt the engine to stop immediately. Start the engine by operating the throttle or pressing the start button. In addition, when the locomotive is running continuously, even if the brake is heavily pressed, the device will not perform idling and automatic flameout when the locomotive is running, which can avoid unnecessary flameout and cause inconvenience. In addition, this device recognizes that the start button and throttle command take precedence over the brake command. When the rider will operate the brake to turn off the locomotive, and immediately find the green light and press the start button or turn the throttle handle, the device immediately starts the engine and can start smoothly.

To achieve the above objective, the engine idling stop control device of the present invention is assembled on a locomotive with an engine, and includes an engine control unit and an idling stop switch. The engine control unit includes a speed sensor for measuring the locomotive, an engine speed sensor for measuring the engine, a throttle opening sensor for measuring the throttle valve of the locomotive, and a battery for measuring the locomotive The voltage sensor, a temperature sensor for measuring the cylinder head of the locomotive, and a stall brake switch. When the brake stroke of the handle of the locomotive exceeds a predetermined stroke, the stall brake switch will be activated, which is less than or equal to the predetermined stroke. During travel, the flameout brake switch will be turned off.

In addition, the idling stop switch is electrically connected to the engine control unit, and can be used to select and control the operating mode of the locomotive as automatic stop at idle or automatic stop at no idling. Among them, when the engine is in the starting state and the locomotive's operating mode is in the idle auto-stop mode, and the following conditions are met: the voltage measured by the voltage sensor is greater than a predetermined voltage, and the temperature measured by the temperature sensor is greater than a predetermined temperature , The speed measured by the vehicle speed sensor is less than a predetermined speed, the engine speed measured by the engine speed sensor is less than a predetermined speed, and the throttle opening measured by the throttle opening sensor is less than a predetermined opening , And the stall brake switch is activated, the engine control unit will stop fuel injection and ignition, and then stall the engine.

The above-mentioned predetermined voltage refers to 12 volts (V). When the voltage sensor detects that the voltage of the battery is less than 12 volts (V), the engine control unit does not control the engine to turn off, that is, the battery still needs to be charged at this time, and the idle speed is not turned on. The flame-out mechanism requires that the battery voltage is greater than 12 volts (V) before the automatic flame-out mechanism is activated at idle speed. In addition, the above-mentioned predetermined temperature refers to 80°C. When the temperature sensor detects that the temperature of the cylinder head is less than 80°C, the engine control unit does not control the engine to stop, that is, the engine is still in the warm-up phase and does not need to be idling. Automatic flameout requires that the temperature of the cylinder head is greater than 80°C, the engine has warmed up, and the automatic flameout mechanism will be activated at idle speed.

The above-mentioned predetermined speed refers to 3 kilometers per hour, the predetermined speed refers to 1800 revolutions per minute (rpm), the predetermined opening refers to 2%, and the predetermined stroke refers to 30%. When the vehicle speed measured by the vehicle speed sensor is less than 3 km/h, the engine speed measured by the engine speed sensor is less than 1800 revolutions per minute (rpm), the throttle opening measured by the throttle opening sensor If it is less than 2%, it means that the engine is idling. When the rider controls the locomotive's grip brake stroke for more than 30%, the stall brake switch will be activated, and the engine control unit will stop fuel injection and ignition, thereby turning off the engine.

After the engine control unit controls the engine to stop, when the stop brake switch is turned off, it means that when the rider controls the locomotive's grip brake stroke of less than 30%, the engine remains in the stopped state, that is, once the idling stop is completed, There is no need to continuously press the brakes to maintain the stalled state.

The above-mentioned locomotive unit is equipped with a brake switch. When the brake stroke of the locomotive is controlled, the brake switch will be activated regardless of whether it is less than, equal to or higher than 30%, that is, the brake light will be on to remind the driver of the vehicle behind. That is, when the rider controls the grip brake of the locomotive, the brake switch will be activated regardless of the stroke. When the grip brake of the locomotive is controlled by more than 30%, the stop brake switch will be activated.

In addition, the brake switch and the flame-out brake switch can be divided into two groups of switches. One group of brake switches is used for igniting the brake lights, and the other group of flame-out brake switches is used for the device to perform idling stop. At 30% and 30%, only the brake switch is activated to control the brake light switch to light the brake lights; when the brake pressure exceeds 30%, not only the brake switch will be activated, but also the stall brake switch will be activated. When the engine meets the idling conditions, the idling can be executed immediately. action.

The above-mentioned brake switch and the flame-out brake switch can also be integrated into a single switch, that is, a group of brake switches can have two-stage switch control. The front brake switch, that is, when the brake light pressure is less than 30%, the brake light switch is controlled to light up the brake. Light, when the brake pressure exceeds 30%, the stop brake switch will be activated to control the engine to stop. That is, when the engine idling stop condition is met and the stop brake switch is activated, the engine idling stop action can be executed.

The activation of the above-mentioned flameout brake switch can be based on the front wheel brake grip brake stroke of the locomotive or the rear wheel brake grip brake stroke, that is, whether the flameout brake switch can be activated or not can be selected based on the front wheel brake grip of the locomotive The brake stroke or selection depends on the grip brake stroke of the rear wheel brake.

The locomotive unit is provided with a start button and a throttle handle. When the start button is pressed or the throttle handle is turned, even if the stall brake switch is activated, the engine control unit still controls the engine to start. That is to say, even if the engine is in an idling stop condition, the engine will restart as long as the start button is pressed or the throttle handle is turned.

In addition, the engine idling stop control method of the present invention is used to control the idling automatic stop of a locomotive having an engine, an engine control unit, and an idling stop switch. The engine control unit is electrically connected to the idle stop switch, and the idle stop switch is electrically connected to the engine control unit. The switch is used to select and control the operating mode of the locomotive to automatically turn off at idling speed or automatically turn off at no idling speed. The engine control unit includes a speed sensor for measuring the locomotive, an engine speed sensor for measuring the engine, and a sensor for measuring the engine speed. The throttle opening sensor of the throttle valve of a locomotive, a voltage sensor to measure the battery of the locomotive, a temperature sensor to measure the cylinder head of the locomotive, and a flameout brake switch, when controlling the grip of the locomotive When the braking stroke exceeds a predetermined stroke, the flame-out brake switch will be activated, and when the stroke is less than or equal to the predetermined stroke, the flame-out brake switch will be closed.

The engine idling stop control method includes the following steps: (A) judging whether the idling stop switch is in the idling automatic stop operation mode, if so, proceed to the next step; (B) judging the voltage measured by the voltage sensor Is it greater than a predetermined voltage and whether the temperature measured by the temperature sensor is greater than a predetermined temperature, if yes, proceed to the next step; (C) Determine whether the vehicle speed measured by the vehicle speed sensor is less than a predetermined vehicle speed, the engine Whether the engine speed measured by the speed sensor is less than a predetermined speed and whether the throttle valve opening measured by the throttle valve opening sensor is less than a predetermined opening, if all are yes, proceed to the next step; D) Determine whether the flameout brake switch is activated, if yes, execute the next step; and (E) control the engine to flameout.

The above summary and the following detailed description are exemplary in nature to further illustrate the scope of patent application of the present invention. The other objectives and advantages of the present invention will be described in the following description and drawings.

Please refer to FIG. 3 which is a system architecture diagram of an engine idling stop control device of a preferred embodiment of the present invention. The engine idling stop control device of this embodiment is assembled on a locomotive 1 having an engine 10, and includes: an engine The control unit 20 and an idling stop switch 30. Among them, the engine control unit 20 has a vehicle speed sensor 21 for measuring the driving speed of the locomotive 1, an engine speed sensor 22 for measuring the engine 10, and a throttle valve opening sensor 23 for measuring the throttle valve of the locomotive 1. A temperature sensor 24 for measuring the temperature of the cylinder head of the locomotive 1, a voltage sensor 25 for measuring the battery of the locomotive 1, and a stop brake switch 26, when the brake stroke of the handle of the locomotive 1 exceeds a predetermined During the travel, the flame-out brake switch 26 will be activated, and when it is less than or equal to the predetermined travel distance, the flame-out brake switch 26 will be closed.

In addition, the idling stop switch 30 can be used to select and control the operating mode of the locomotive 1 to be automatic idling or non-idling automatic stop. The idling stop switch 30 is electrically connected to the engine control unit 20. Among them, when the engine 10 is in the starting state and the operating mode of the locomotive 1 is in the idle auto-stop mode, and the following conditions are met: the voltage measured by the voltage sensor 25 is greater than a predetermined voltage, and the temperature measured by the temperature sensor 24 Is greater than a predetermined temperature, the vehicle speed measured by the vehicle speed sensor 21 is less than a predetermined vehicle speed, the engine speed measured by the engine speed sensor 22 is less than a predetermined speed, and the throttle valve measured by the throttle opening sensor 23 The opening degree is less than a predetermined opening degree and the flameout brake switch 26 is activated. The engine control unit 20 controls the fuel injector 15 of the engine 10 to stop fuel injection and the igniter 14 to stop ignition, so that the engine 10 is stopped.

In this embodiment, the aforementioned predetermined voltage refers to 12 volts (V). When the voltage sensor 25 detects that the voltage of the battery is less than 12 volts (V), the engine control unit 20 does not control the engine 10 to turn off, that is, this When the battery still needs to be charged, the idle speed automatic shutdown mechanism is not activated, and the automatic idle shutdown mechanism will be activated when the battery voltage is greater than 12 volts (V). In addition, the aforementioned predetermined temperature refers to 80°C. When the temperature sensor 24 detects that the temperature of the cylinder head is less than 80°C, the engine control unit 20 does not control the engine 10 to stop, that is, the engine 10 is still warming up at this time At this stage, the idling automatic shutdown mechanism is not activated, and the engine 10 must be warmed up when the temperature of the cylinder head is greater than 80°C, and the idling automatic shutdown mechanism will be activated.

In addition, in this embodiment, the aforementioned predetermined vehicle speed refers to 3 kilometers/hour, the predetermined rotation speed refers to 1800 revolutions per minute (rpm), the predetermined opening degree refers to 2%, and the predetermined stroke refers to 30%. When the vehicle speed measured by the vehicle speed sensor 21 is less than 3 km/h, the engine speed measured by the engine speed sensor 22 is less than 1800 revolutions per minute (rpm), and the throttle measured by the throttle opening sensor 23 If the valve opening is less than 2%, it means that the engine 10 is idling. If the rider controls the brake stroke of the locomotive 1 to exceed 30%, the stop brake switch 26 will be activated, and the engine control unit 20 will control the fuel injection of the engine 10 The nozzle 15 stops fuel injection and the igniter 14 stops ignition, thereby stopping the engine 10.

In addition, after the engine control unit 20 controls the engine 10 to stop, if the stop brake switch 26 is turned off, it means that the rider's grip brake stroke of the locomotive 1 is less than 30%, and the engine 10 remains in the stopped state. That is, once the engine 10 has completed the idling stall, the stall state can be maintained without continuously pressing the brakes.

As shown in Figure 3, the locomotive 1 set is equipped with a brake switch 19. When the rider controls the brake stroke of the locomotive 1, whether it is less than, equal to or higher than 30%, the brake switch 19 will be activated, that is, the brake lights will be activated. Lights up to remind the driver of the vehicle behind. That is, when the rider controls the grip brake of the locomotive 1, the brake switch 19 will be activated regardless of the stroke. When the grip brake of the locomotive 1 is controlled to exceed 30%, the stop brake switch 26 will be activated. If other idle speed conditions are met, the idle speed stop action can be executed immediately. In addition, whether the stall brake switch 26 can be activated or not can be based on the front wheel brake grip brake stroke of the locomotive 1 or the rear wheel brake grip brake stroke, both of which can achieve the functions of the cost embodiment.

In addition, the locomotive group 1 is provided with a start button 17 and a throttle handle 18. When the start button 17 is pressed or the throttle handle 18 is rotated, even if the stall switch 26 is activated, the engine control unit 20 still controls the engine 1 to start . That is, when the engine 10 is idling and stopped, as long as the start button 17 is pressed or the throttle handle 18 is rotated, the engine control unit 20 will control the start motor of the engine 10 to restart the engine 10.

Please refer to FIG. 4 which is a control flowchart of an engine idling stop control device of a preferred embodiment of the present invention, which is used to control the automatic idling speed of a locomotive 1 having an engine 10, an engine control unit 20, and an idling stop switch 30 The idle speed and idle speed stop switcher 30 is used to select and control the operation mode of the locomotive 1 as idle speed automatic stop or no idle speed automatic stop. The idle speed stop switch 30 is electrically connected to the engine control unit 20, and the engine control unit 20 includes a measuring device. The speed sensor 21 of the locomotive 1, an engine speed sensor 22 that measures the engine 10, a throttle opening sensor 23 that measures the throttle of the locomotive 1, and a battery that measures the locomotive 1. Voltage sensor 25, a temperature sensor 24 for measuring the cylinder head of the locomotive 1, and a stall brake switch 26. When the brake stroke of the handle of the locomotive 1 exceeds a predetermined stroke, the stall brake switch 26 will be activated. When it is less than or equal to the predetermined stroke, the flameout brake switch 26 will be turned off.

When the engine 10 is in the starting state, the engine control unit 20 executes the engine idling stop control method including the following steps: Step (SA) judges whether the idling stop switch 30 is in the idling automatic stop operation mode, if so, the idling stop at this time If the indicator light is ON, the next step is executed, if not, the engine 10 is returned to the starting state. That is, the rider can use the idle speed stop switch 30 to select whether to execute the idle speed automatic stop function.

Next, step (SB) judges whether the voltage measured by the voltage sensor 25 is greater than a predetermined voltage and the temperature measured by the temperature sensor 24 is greater than a predetermined temperature, if yes, proceed to the next step, if not, Then the engine 10 is returned to the starting state. The above-mentioned predetermined voltage refers to 12 volts (V), and the predetermined temperature refers to 80°C. That is, when the voltage of the battery is less than 12 volts (V) or the temperature of the cylinder head is less than 80°C, the idle speed automatic flameout mechanism will not Turn on. When the battery voltage is greater than 12 volts (V) and the temperature of the cylinder head is greater than 80°C, the idling auto-stop mechanism will be activated.

Next, step (SC) determines whether the vehicle speed measured by the vehicle speed sensor 21 is less than a predetermined vehicle speed, whether the engine speed measured by the engine speed sensor 22 is less than a predetermined speed, and the throttle opening sensor 23 Whether the measured throttle opening is less than a predetermined opening, if all are yes, then execute the next step, if not, then return to the engine 10 to be in the starting state. The above-mentioned predetermined vehicle speed refers to 3 km/h, the predetermined speed refers to 1800 revolutions per minute (rpm), and the predetermined opening refers to 2%. When all the above conditions are met, it means that the engine 10 is at idling speed, and the idling automatic shutdown mechanism Turn on; if all is not satisfied, it means that the engine 10 is not in idling speed, and the idling auto-stop mechanism will not be turned on.

Next, step (SD) judges whether the stop brake switch 26 is activated, if it is, the idle stop indicator is flashing at this time, then the next step, if not, return to the engine 10 in the starting state. When the rider controls the grip brake stroke of the locomotive 1 over 30%, the stall brake switch 26 will be activated, and the engine control unit 20 will control the engine 10 to stall; if the stall brake switch 26 is not activated, it means that the grip brake stroke has not exceeded 30% , The auto-stop mechanism at idle speed will not be turned on, and the engine 10 is still in the starting state.

Next, in step (SE), the engine 10 is turned off. Next, to restart the engine 10, step (SF) determines whether the start button 17 of the locomotive 1 is pressed or the throttle handle 18 is turned, if yes, then the next step (SG) starts the engine 10, if not, then The engine 10 is returned to the stalled state (SE). That is, when the engine 10 is idling and stopped, as long as the start button 17 is pressed or the throttle handle 18 is turned, the engine control unit 20 will control the start motor of the engine 10 to restart the engine 10.

Thereby, the engine idling stop control device and method of the present embodiment can directly reflect the rider’s will. When the engine 10 meets the idling stop condition and the rider decides to stop, he can directly press the brake to trigger the stop brake switch 26 to prompt the engine 10 Turn off the engine immediately. After turning off the engine, you can start the engine 10 by operating the throttle handle 18 or pressing the start button 17. In addition, when locomotive 1 continues to run, even if the brake is heavily applied, this device will not perform idling automatic shutdown when locomotive 1 is driving, because it does not meet the conditions of idle speed, which can avoid unnecessary flameout conditions and cause delayed start. cause inconvenience. In addition, this embodiment assumes that the start button 17 and throttle handle 18 commands take precedence over the brake command. When the rider will operate the brake to turn off the locomotive 1, and immediately find the green light and press the start button 17 or turn the throttle handle 18, the device immediately starts the engine 10. Can start smoothly.

The above-mentioned embodiments are merely examples for the convenience of description, and the scope of rights claimed in the present invention should be subject to the scope of the patent application, rather than being limited to the above-mentioned embodiments.

1: Locomotive 10: Engine 14: igniter 15: fuel injector 17: Start button 18: Throttle handle 19: Brake switch 20: Engine control unit 21: Vehicle Speed Sensor 22: Engine Speed Sensor 23: Throttle valve opening sensor 24: Temperature sensor 25: Voltage sensor 26: Stop brake switch 30: Idle speed stop switch 910: Engine 920: Engine Control Unit 921: Vehicle Speed Sensor 922: Engine Speed Sensor

Figure 1 is a system architecture diagram of a conventional engine idling stop control device. Figure 2 is the control flow chart of the conventional engine idling stop control device. Fig. 3 is a system architecture diagram of a preferred embodiment of the engine idling stop control device of the present invention. Fig. 4 is a control flow chart of an engine idling stop control device according to a preferred embodiment of the present invention.

1: locomotive

10: Engine

14: Igniter

15: Fuel injector

17: Start button

18: Throttle handle

19: Brake switch

20: Engine control unit

21: Vehicle Speed Sensor

22: Engine Speed Sensor

23: Throttle valve opening sensor

24: temperature sensor

25: Voltage sensor

26: Turn off the brake switch

30: Idle speed stop switch

Claims (8)

An engine idle speed stop control device, assembled on a locomotive with an engine, includes: an engine control unit, including a vehicle speed sensor for measuring the locomotive, an engine speed sensor for measuring the engine, and a measurement The throttle opening sensor of the throttle valve of the locomotive, a voltage sensor that measures the battery of the locomotive, a temperature sensor that measures the cylinder head of the locomotive, and a flameout brake switch, when controlling the locomotive When the grip brake stroke exceeds a predetermined stroke, the flameout brake switch will be activated, and the flameout brake switch will be activated. When the brake stroke is less than or equal to the preset stroke, the flameout brake switch will not be triggered, and the flameout brake switch will be turned off. It is provided with a brake switch, which will be activated when the brake stroke of the handle of the locomotive is controlled, and the brake switch and the stop brake switch can be integrated into a single component; and an idling stop switch, which is electrically connected to the engine control unit, It is used to select and control the operating mode of the locomotive as idling auto-stop or no-idle auto-stop; among them, when the engine is in the starting state and the operating mode of the locomotive is in the idling auto-stop mode, and the following conditions are met: the voltage sensor The measured voltage is greater than a predetermined voltage, the temperature measured by the temperature sensor is greater than a predetermined temperature, the vehicle speed measured by the vehicle speed sensor is less than a predetermined vehicle speed, and the engine speed measured by the engine speed sensor is less than With a predetermined speed, the throttle opening measured by the throttle opening sensor is less than a predetermined opening, and the stall brake switch is activated, the engine control unit controls the engine to stall. The engine idling stop control device described in item 1 of the scope of patent application, wherein the predetermined stroke refers to 30%, the predetermined voltage refers to 12 volts (V), and the predetermined temperature refers to Refers to 80°C, the predetermined speed refers to 3 km/h, the predetermined speed refers to 1800 revolutions per minute (rpm), and the predetermined opening refers to 2%. The engine idling stop control device described in the first item of the scope of patent application, wherein after the engine control unit controls the engine to stop, when the stop brake switch is turned off, the engine remains in the stopped state. For example, the engine idling stop control device described in item 1 of the scope of patent application, wherein the stop brake switch can be activated according to the grip brake stroke of the front wheel brake or the grip brake stroke of the rear wheel brake of the locomotive. An engine idling stop control method for controlling the idling automatic stop of a locomotive having an engine, an engine control unit, and an idling stop switch. The idle stop switch is used to select and control the operation mode of the locomotive as idling automatic stop or The engine is automatically turned off without idling. The idling stop switch is electrically connected to the engine control unit. The engine control unit includes a speed sensor for measuring the locomotive, an engine speed sensor for measuring the engine, and a section for measuring the locomotive. Throttle valve opening sensor of the flow valve, a voltage sensor for measuring the battery of the locomotive, a temperature sensor for measuring the cylinder head of the locomotive, and a stop brake switch, when controlling the brake stroke of the locomotive's grip When a predetermined stroke is exceeded, the flame-out brake switch will be activated, and the flame-out brake switch will be activated. When it is less than or equal to the predetermined stroke, the flame-out brake switch will not be activated, and the flame-out brake switch will be turned off. The locomotive unit is equipped with a brake switch When the brake stroke of the handle of the locomotive is controlled, the brake switch will be activated, and the brake switch and the stall brake switch can be integrated into a single component; the engine idling stall control method includes the following steps: (A) judging the idling stall switch Whether the device is in the operation mode of idling and automatic flameout, if yes, proceed to the next step; (B) Determine whether the voltage measured by the voltage sensor is greater than a predetermined voltage and whether the temperature measured by the temperature sensor is greater than a predetermined temperature, if yes, proceed to the next step; (C) Determine whether the vehicle speed sensor Whether the measured vehicle speed is less than a predetermined vehicle speed, whether the engine speed measured by the engine speed sensor is less than a predetermined speed, and whether the throttle opening measured by the throttle opening sensor is less than a predetermined opening If all of them are yes, then proceed to the next step; (D) determine whether the stop brake switch is activated, if yes, proceed to the next step; and (E) control the engine to stop. As described in the fifth item of the scope of patent application, the engine idling stop control method, wherein the predetermined stroke refers to 30%, the predetermined voltage refers to 12 volts (V), and the predetermined temperature refers to 80%. C. The predetermined vehicle speed refers to 3 kilometers per hour, the predetermined speed refers to 1800 revolutions per minute (rpm), and the predetermined opening refers to 2%. The engine idling stop control method described in item 5 of the scope of patent application, wherein after the engine control unit controls the engine to stop, when the stop brake switch is turned off, the engine remains in the stopped state. For example, the engine idling stop control method described in item 5 of the scope of patent application, wherein the stop brake switch can be activated according to the grip brake stroke of the front wheel brake or the grip brake stroke of the rear wheel brake of the locomotive.

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