TWI494503B - Engine idle and automatic shutdown system and controlling method thereof - Google Patents

Description

Engine idle speed automatic flameout system and control method thereof

The invention relates to an engine idle speed automatic flameout system and a control method thereof, in particular to an idle speed automatic flameout system suitable for a locomotive engine and a control method thereof.

The exhaust gas emitted by steam locomotives is one of the main factors causing air pollution and the greenhouse effect. The concentration of exhaust gas emitted by locomotives during idle speed (such as the red light at intersections) is several times that of normal driving, so it is necessary to effectively prevent them. The best way to discharge exhaust gas from an locomotive is to turn off the engine.

In addition, due to the increasingly stringent requirements of environmental protection regulations, national environmental protection related units gradually require steam and locomotives to wait for traffic lights, traffic jams, and roadside suspensions, that is, when idle speed exceeds a certain period of time (such as 3 minutes), it must be mandatory. The engine is off. Therefore, how to control the engine to automatically extinguish the flame at idle speed, suppress the gas emissions of steam and locomotives, and reduce the consumption of gasoline fuel is an urgent problem for vehicle manufacturers.

Some locomotives that have been on the market in recent years have used the engine control unit (ECU) of the jet engine to detect whether the handle of the locomotive is not being held, etc. based on the engine speed, speed and grip sensor. To determine if the engine should be turned off. Referring to FIG. 1 , the system architecture of the engine idle speed automatic flameout is shown. The system architecture mainly includes: a grip sensor 91, a vehicle speed sensor 92, a timer 93 and an idle stop control unit 94. The grip sensor 91 is used to detect whether the handle of the locomotive is The vehicle speed sensor 92 is used to measure the speed of the locomotive, the timer 93 is used to measure the duration of the handle being unheld, and the idle speed control unit 94 is electrically connected to the grip sensor 91 and the vehicle speed sensing. And a timer 93.

When the engine 95 of the locomotive is in the starting state, the gripper sensor 91 detects that the handle is not gripped, the timer 93 measures that the duration of the handle is not held reaches a predetermined value, and the vehicle speed sensor 92 measures the locomotive. When the vehicle speed is zero, that is, the locomotive system is in idle speed, the idle speed flameout control unit 94 outputs a signal to control the engine 95 of the locomotive to be turned off.

Please refer to FIG. 2 and FIG. 3 , which are respectively a system architecture diagram of an engine idle speed automatic flameout and a control flow chart thereof. The engine control unit 80 includes a vehicle speed sensor 81 for measuring the traveling speed of the locomotive, an engine speed sensor 82 of a measuring engine 87, a throttle opening sensor 83 of a measuring engine 87, and a measuring engine 87. The temperature sensor 84 of the cylinder head working temperature and the idle speed switch 85 are provided for the locomotive rider to select and control the operation mode of the locomotive to be idling automatic flameout or automatic ignition without idling.

When the engine 87 is in the starting state and the idle stop switch 85 is in the idle automatic stop mode, the vehicle speed measured by the vehicle speed sensor 81 is less than a predetermined vehicle speed, and the engine 87 measured by the engine speed sensor 82 is less than a predetermined speed. The engine 87 throttle valve opening measured by the rotational speed and throttle opening sensor 83 is less than a predetermined opening degree, and the engine 87 is determined by the temperature sensor 84. The cylinder head operating temperature is greater than a predetermined temperature, and the idle speed control is performed. The timer 861 of the unit 86 starts counting, and when the above condition meets the duration for more than a predetermined time, indicating that the locomotive is at idle speed at this time, the idle reduction control unit 86 controls the engine 87 to automatically decelerate.

When the idle stop switch 85 is in the idle automatic stop mode, the idle speed automatic control method includes the following steps: determining whether the engine 87 cylinder head operating temperature measured by the temperature sensor 84 is greater than a predetermined temperature (S1), if Then, the next step is performed; then, it is determined whether the vehicle speed measured by the vehicle speed sensor 81 is less than a predetermined vehicle speed, whether the engine 87 speed measured by the engine speed sensor 82 is less than a predetermined speed, and the throttle opening sensor The throttle opening measured by 83 is less than a predetermined opening degree (S2), and if yes, the next step is performed; then, it is determined that the timer 861 measures the above-mentioned respective sensors 81, 82, 83. Whether the duration exceeds a predetermined time (S3), and if so, the next step is performed; then, the idle stop control unit 86 controls the engine 87 to be turned off (S4), that is, the locomotive is in an operation mode in which the idle stop mechanism is established; In the steps (S1), (S2), and (S3), if any of the determinations is negative, the process proceeds directly to the step (S5). The idle stop control unit 86 does not control the engine 87 to be turned off, that is, the locomotive system is at idle speed. Mechanism is not successful The mode of operation.

If the locomotive has the idling stop device as described above, when the driver rides on the middle line of the road and stops to prepare for the turn, the engine will be turned off after the idle stop mechanism is satisfied; when the driver decides that there is no coming car At the same time, turning the handle again allows the engine to accelerate after it is started. This method is easy to increase the danger of unpredictability, and there is still room for improvement. That is, when the driver is waiting to turn, there is an urgent need for power at any opportunity at this time. The idle stop device should not be implemented. In other words, when the driver is riding, the direction light is stopped at the middle line of the road. At this time, the engine should not be turned off when it is time to wait.

Because of this, in the spirit of active invention, the engine idle speed automatic flameout system and its control method can solve the above problems, and the research and experiment are finally completed to complete the present invention.

The main object of the present invention is to provide an engine idle speed automatic flameout system. When the idle speed flameout control unit detects that the direction light is activated, the idle speed flameout mechanism will automatically fail to ensure that the engine is not automatically driven by the direction light. Idle the flame.

To achieve the above objective, the engine idle speed automatic flameout system of the present invention is assembled on a locomotive having an engine, comprising: an engine control unit and an idle reduction control unit having a timer. The engine control unit has a vehicle speed sensor for measuring the traveling speed of the locomotive, an engine speed sensor for measuring the engine, a throttle opening sensor for measuring the throttle of the locomotive, and a direction for detecting the locomotive. The direction sensor of whether the lamp is activated; the idle stop control unit is electrically connected to the engine control unit. When the engine is in the starting state and the direction light sensor detects that the directional light of the locomotive is not actuated, the speed measured by the vehicle speed sensor is less than a predetermined speed, and the engine speed measured by the engine speed sensor is less than a predetermined speed, the throttle valve When the opening of the throttle valve measured by the opening sensor is less than a predetermined opening degree, the timer starts counting, and when the speed sensor, the engine speed sensor and the throttle opening sensor meet the above conditions, the duration exceeds At a predetermined time, the idle stop control unit controls the engine to stall. However, when the idling stop control unit detects that the directional light is active, the idling stop mechanism will automatically fail, that is, the idling stop control unit Do not control the engine to stall, to ensure that the locomotive is under the direction light, the engine will not automatically idle.

The invention may further comprise a temperature sensor electrically connected to the idle stop control unit, the temperature sensor being fixed on an object of the locomotive for detecting the temperature of the object; when the temperature sensor detects that the temperature of the object is less than At a predetermined temperature, the idle stop control unit does not output any signal that controls the engine to be extinguished, that is, the engine is still in the warm-up phase, and there is no need to automatically de-ignite at idle.

The object may be the cylinder head of the engine, that is, the temperature sensor may be installed on the cylinder head of the engine, and the predetermined temperature may be set to 100 ° C. When the temperature of the cylinder head is less than 100 °C, it means that the engine has just started, it is still in the warm-up phase, and it does not need to be automatically turned off at idle speed. When the temperature of the cylinder head is greater than or equal to 100 ° C, indicating that the engine has completed warming up, the idle speed control unit may be controlled to stop the engine according to the original mechanism. In addition, the predetermined temperature may also be set to a fixed value between 90 and 110 ° C, depending on the size of the engine and the stroke.

In addition, when the temperature sensor is installed in different positions, the corresponding predetermined temperature may be different. For example, if the temperature sensor is installed in the intake pipe between the air cleaner and the throttle valve, the predetermined temperature can be set to 40 °C. If the temperature sensor is installed in the intake pipe between the cylinder head and the throttle valve, the predetermined temperature can be set to 70 °C. If the temperature sensor is installed in the locomotive tank of the locomotive to measure the temperature of the oil, the predetermined temperature can be set to 85 °C.

The invention may further comprise an idle stop switch electrically connected to the idle stop control unit for selecting and controlling the operation mode of the locomotive to be an idle automatic turn off or no idle automatic turn off; when the idle stop switch is in an idle idle automatic stop mode When the idle stop control unit does not output any signal that controls the engine to stall.

The above-mentioned idle stop switch can be a push switch or other equivalent component, so that the locomotive rider can control the operation mode of the locomotive to be idling automatic flameout or automatic igniting without idling. That is to say, the locomotive rider can freely choose whether or not there is a mechanism for idling automatic flameout, which can be changed only by hand pressing the switch.

The predetermined speed measured by the above vehicle speed sensor can be set to 3 km / h, 2 km / h or other speed, and the predetermined speed measured by the engine speed sensor can be set to 1800 rpm, 1700 rpm / Minutes or other revolutions. The predetermined opening degree measured by the throttle opening sensor can be set to 1% or other opening degree, and the predetermined time set by the above timer can be set to 2 minutes, 1 minute or other time. The values set by the above various qualification conditions may be set according to the performance of the engine, and the qualification conditions may be stored in a memory or other equivalent storage medium in the idle reduction control unit.

The invention further provides an engine idle speed automatic flameout control method for controlling an idle speed automatic flameout of a locomotive having an engine, an engine control unit and an idle stop control unit, the idle speed flame control unit has a timer and is electrically connected In the engine control unit, the engine control unit has a vehicle speed sensor for measuring the traveling speed of the locomotive, an engine speed sensor for measuring the engine, a throttle opening sensor for measuring the throttle opening of the locomotive, and a detecting The directional lamp sensor for measuring whether the locator's directional light is activated, the control method includes the following steps: (A) determining whether the directional light of the locomotive detected by the directional light sensor is activated, and if not, performing the next step; (B) determining whether the vehicle speed measured by the vehicle speed sensor is less than a predetermined vehicle speed, whether the engine speed measured by the engine speed sensor is less than a predetermined speed, and the throttle opening sensor Whether the throttle opening of the measurement is less than a predetermined opening degree, if all is, the next step is performed; if not, the engine is not controlled to be turned off; (C) the timer starts counting; (D) determining the amount of the timer Measure the speed sensor, the engine speed sensor and the throttle opening sensor according to whether the duration of step (B) exceeds a predetermined time, and if so, perform the next step; if not, the engine is not turned off; (E) The control engine is turned off.

In addition, the present invention may further include a temperature sensor electrically connected to the idle stop control unit, the temperature sensor may be fixed on an object of the locomotive to detect the temperature of the object, and the engine of the present invention automatically de-ignites The control method may further increase a step (A1) after the step (A) to determine whether the temperature detected by the temperature sensor is greater than a predetermined temperature, and if so, perform the next step.

The invention may further comprise an idle stop switch electrically connected to the idle stop control unit for selecting and controlling the operation mode of the locomotive to be idle automatic extinguishing or no idle automatic extinguishing, and the engine idle speed automatic flameout control of the invention The method may further increase a step (A0) before step (A) to determine whether the idle stop switch is in the idle automatic stop mode, and if so, perform the next step (A).

4 is a system architecture diagram of a preferred embodiment of the present invention. The engine idle speed automatic flameout system of the present embodiment is assembled on a locomotive having an engine 10, including: an engine control unit 20, and an idle speed. The flameout control unit 40 and an idle stop switch 30. The engine control unit 20 has a vehicle speed sensor 21 for measuring the traveling speed of the locomotive, an engine speed sensor 22 for measuring the engine 10, and a throttle opening sensor 23 for the throttle of the measuring vehicle. A temperature sensor 24 for measuring the temperature of an object of the locomotive and a direction sensor 25 for detecting whether the directional light of the locomotive is actuated. In the present embodiment, the temperature sensor 24 is fixed to the cylinder head of the engine 10 for measuring the operating temperature of the cylinder head of the engine 10.

The idle stop control unit 40 is electrically connected to the engine control unit 20 and the idle stop switch 30, and the idle stop control unit 40 has a timer 41. In addition, the idle stop switch 30 is used to select the control mode of the locomotive to be idle automatic stop or automatic idle stop; when the idle stop switch 30 is in the idle mode, the idle stop control unit 40 does not output any A signal that controls the engine 10 to turn off. In the embodiment, the idle stop switch 30 is a push switch, which can facilitate the locomotive rider to change the operation mode of the locomotive to idle automatic stop or automatic idle without idle.

When the engine 10 is in the starting state and the direction light sensor 25 detects that the directional light of the locomotive is not actuated, the vehicle speed measured by the vehicle speed sensor 21 is less than a predetermined vehicle speed, and the engine speed measured by the engine speed sensor 22 is less than a predetermined speed. When the throttle opening degree measured by the throttle opening sensor 23 is less than a predetermined opening degree, the timer 41 starts counting, and when the vehicle speed sensor 21, the engine speed sensor 22, and the throttle opening degree are sensed The idle reduction control unit 40 controls the engine 10 to turn off when the duration of the condition of the above-mentioned condition 23 exceeds a predetermined time. In the present embodiment, the predetermined vehicle speed refers to 3 km/hour, and the predetermined rotation speed refers to 1800 revolutions per minute (rpm), and the predetermined opening degree refers to 1%, and the predetermined opening time refers to 2 minutes.

However, when the temperature sensor 24 detects that the operating temperature of the cylinder head of the engine 10 is less than a predetermined temperature, the idle reduction control unit 40 does not output any signal for controlling the engine 10 to be turned off. That is, at this time, the engine 10 is still in the warm-up phase, and does not need to be automatically turned off at idle speed. In the present embodiment, the predetermined temperature is set to 100 °C.

Therefore, when the idle stop switch 30 is in the idle automatic stop mode, when the idle stop control unit 40 detects that the direction light is activated, the idle stop mechanism is automatically disabled to ensure that the locomotive is under the direction light. The engine 10 does not automatically idle and stall. In addition, when the directional light is not actuated, the idling stop control unit 40 can directly control the engine 10 according to the data of each of the sensors 21 to 25, and the engine 10 is turned off to achieve the purpose of automatic flameout.

Please refer to FIG. 5 for a control flow chart of a preferred embodiment of the present invention, and please refer to FIG. 4 together. The engine idle speed automatic flameout control method of the embodiment is used for controlling an engine 10, an engine control unit 20, and an idle flame cut The idling automatic de-ignition of the locomotive 30 and one idling stop control unit 40, the idling stop control unit 40 has a timer 41 and is electrically connected to the engine control unit 20, and the engine control unit 20 includes a measuring locomotive speed The sensor 21, the engine speed sensor 22 of the measuring engine 10, the throttle opening sensor 23 of the throttle opening of the measuring engine 10, and the temperature sensing device of the measuring temperature of the object 10 24. A directional light sensor 25 for detecting whether the directional light of the locomotive is activated.

When the engine 10 is in an active state, the control method includes the following steps: (SA0) It is determined whether the idle stop switch 30 is in the idle automatic extinguishing operation mode, and if so, the next step (SA) is executed, and if not, the process proceeds directly to the step (SF).

(SA) It is judged whether or not the directional light of the locomotive detected by the directional light sensor 25 is activated. If not, the next step is performed, and if so, the process proceeds directly to the step (SF).

(SA1) determines whether the temperature detected by the temperature sensor 24 is greater than a predetermined temperature, and if so, performs the next step, and if not, proceeds directly to step (SF). In the present embodiment, the article refers to the cylinder head of the engine 10, and the predetermined temperature is 100 °C.

(SB) determining whether the vehicle speed measured by the vehicle speed sensor 21 is less than a predetermined vehicle speed, whether the engine 10 speed measured by the engine speed sensor 22 is less than a predetermined speed, and the throttle opening sensor 23 measures Whether the throttle opening is less than a predetermined opening degree, if all is, the next step is performed, and if not, it goes directly to step (SF). In the present embodiment, the predetermined vehicle speed refers to 3 km / hour, and the predetermined speed refers to 1800 revolutions / minute (rpm), the predetermined opening degree refers to 1%.

The (SC) timer 41 starts counting.

(SD) The speed sensor 21, the engine speed sensor 22, and the throttle opening sensor 23 measured by the timer 41 are in accordance with whether the duration of the step (SB) exceeds a predetermined time, and if so, the next step is executed. Step, if not, go directly to step (SF). In the present embodiment, the predetermined time is 2 minutes.

(SE) Control engine 10 is turned off.

(SF) does not control the engine 10 to stall.

Thereby, when the engine 10 is in the starting state, when the idle stop switch 30 is in the idle automatic extinguishing operation mode, when the idle stop control unit 40 detects that the direction light is activated, the idle stop mechanism is automatically disabled, Make sure that the locomotive is under the direction light and the engine 10 will not automatically idle. In addition, when the idling stop control unit 40 detects that the directional light is not actuated, the idling stop control unit 40 can directly control the engine 10 according to the data of each of the sensors 21 to 25, and the engine 10 is turned off to achieve the purpose of automatic flameout.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

10‧‧‧ engine

20‧‧‧Engine Control Unit

21‧‧‧Speed Sensor

22‧‧‧Engine speed sensor

23‧‧‧Throttle opening sensor

24‧‧‧Temperature Sensor

25‧‧‧ Directional Light Sensor

30‧‧‧Idle speed switch

40‧‧‧Idle speed control unit

41‧‧‧Timer

80‧‧‧Engine Control Unit

81‧‧‧Speed Sensor

82‧‧‧Engine speed sensor

83‧‧‧Throttle opening sensor

84‧‧‧Temperature Sensor

85‧‧‧Idle speed switch

86‧‧‧Idle speed control unit

861‧‧‧Timer

87‧‧‧ engine

91‧‧‧Bump Sensor

92‧‧‧Speed Sensor

93‧‧‧Timer

94‧‧‧Idle speed control unit

95‧‧‧ Engine

FIG. 1 is a system architecture diagram of a known engine idle speed automatic flameout.

FIG. 2 is a system architecture diagram of another conventional engine idle speed automatic flameout.

3 is a control flow chart of the conventional engine idle speed automatic flameout of FIG.

4 is a system architecture diagram of a preferred embodiment of the present invention.

Figure 5 is a control flow diagram of a preferred embodiment of the present invention.

10‧‧‧ engine

20‧‧‧Engine Control Unit

21‧‧‧Speed Sensor

22‧‧‧Engine speed sensor

23‧‧‧Throttle opening sensor

24‧‧‧Temperature Sensor

25‧‧‧ Directional Light Sensor

30‧‧‧Idle speed switch

40‧‧‧Idle speed control unit

41‧‧‧Timer

Claims (10)

An engine idle speed automatic flameout system is set on a locomotive having an engine, comprising: an engine control unit, comprising a vehicle speed sensor for measuring the locomotive, an engine speed sensor for measuring the engine, and a measuring machine a throttle opening sensor of the throttle of the locomotive and a directional light sensor for detecting whether the directional light of the locomotive is activated; and an idle stop control unit electrically connected to the engine control unit, including a timer When the engine is in the starting state and the direction sensor detects that the directional light of the locomotive is not actuated, the 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 one. When the predetermined rotational speed and the throttle opening measured by the throttle opening sensor are less than a predetermined opening degree, the timer starts counting, and when the vehicle speed sensor, the engine speed sensor, and the throttle valve When the opening degree sensor meets the above condition for a duration exceeding a predetermined time, the idle speed extinguishing control unit controls the engine to be turned off. The engine idling automatic flameout system according to claim 1, further comprising a temperature sensor electrically connected to the idling stop control unit, which is fixed on an object of the locomotive for detecting the The temperature of the object; when the temperature sensor detects that the temperature of the object is less than a predetermined temperature, the idle stop control unit does not output any signal to control the engine to stall. The engine idle speed automatic flameout system according to claim 2, wherein the object is a cylinder head of the engine, and the predetermined temperature is 100 °C. The engine idle speed automatic flame-extinguishing system according to claim 1, further comprising an idle-speed flame-extinguishing switch electrically connected to the idle-speed flameout control unit, configured to selectively control the operation mode of the locomotive to be idle-speed automatic flameout or no idle speed Automatic flameout; when the idle stop switch is in the idle mode, the idle stop control unit does not output any signal to control the engine to stall. The engine idle speed automatic flameout system according to claim 1, wherein the predetermined speed refers to 3 km/hour, and the predetermined speed refers to 1800 revolutions per minute (rpm), and the predetermined opening degree refers to 1%. An engine idle speed automatic flameout control method for controlling an idle speed automatic flameout of a locomotive having an engine, an engine control unit, and an idle stop control unit, the idle stop control unit having a timer and electrically connected to the engine a control unit, the engine control unit includes a vehicle speed sensor for measuring the locomotive, an engine speed sensor for measuring the engine, a throttle opening sensor for measuring the opening of the throttle valve, and a detecting Whether the direction light of the locomotive is actuated or not, the control method comprises the following steps: (A) determining whether the direction light of the locomotive detected by the directional light sensor is activated, and if not, performing the next step; B) judging whether the vehicle speed measured by the vehicle speed sensor is less than a predetermined vehicle speed, and whether the engine speed measured by the engine speed sensor is less than a pre-predetermined The fixed speed and the throttle opening measured by the throttle opening sensor are less than a predetermined opening degree, and if all are, the next step is performed; (C) the timer starts timing; (D) Determining whether the speed sensor, the engine speed sensor and the throttle opening sensor measured by the timer meet the duration of the step (B) for more than a predetermined time, and if yes, performing the next step; (E) Control the engine to stall. The engine idle speed automatic flameout control method according to claim 6, wherein the locomotive further comprises a temperature sensor electrically connected to the idle speed extinguishing control unit, which is fixed on an object of the locomotive and used To detect the temperature of the object, after step (A), a step (A1) is further added to determine whether the temperature detected by the temperature sensor is greater than a predetermined temperature, and if so, the next step is performed. The engine idle speed automatic flameout control method according to claim 7, wherein the object is a cylinder head of the engine, and the predetermined temperature is 100 °C. The engine idle speed automatic flameout control method according to claim 6, wherein the locomotive further comprises an idle stop switch electrically connected to the idle stop control unit for selectively controlling the operation mode of the locomotive to be idle automatic If the flame is turned off or the ignition is not turned off automatically, before step (A), a step (A0) is added to determine whether the idle stop switch is in the idle automatic stop mode, and if so, the next step (A) is performed. The engine idle speed automatic flameout control method according to claim 6, wherein the predetermined speed refers to 3 km/hour, and the predetermined rotation speed refers to 1800 revolutions per minute (rpm), and the predetermined opening degree refers to 1%. .