JP3694897B2 - Engine output control device - Google Patents

Description

[0001]
[Industrial application fields]
  The present invention relates to an engine output control device that controls engine output by opening / closing control of an electric throttle valve disposed in an intake passage.
[0002]
[Prior art]
  Conventionally, an electric throttle valve that is driven by an electric actuator such as a stepping motor to open and close the intake passage is provided alone in the engine intake passage or in series with a mechanical throttle valve that is linked to an accelerator pedal. 2. Description of the Related Art An engine output control device is known in which an opening / closing control of a valve is performed to adjust an intake air flow rate to the engine to limit an increase in output torque.
[0003]
  As an example of this type of engine output control device, for example, in the one disclosed in JP-A-2-291463, a target torque to be output by the engine is calculated, and this target torque is corrected in accordance with the engine temperature to thereby adjust the electric throttle. The opening degree of the valve is obtained, and the limit amount of the engine output is made to correspond to the opening degree of the throttle valve.
[0004]
[Problems to be solved by the invention]
  By the way, when setting the opening of the electric throttle valve according to the engine temperature as in the conventional case, the detection system for detecting the engine temperature has an abnormality such as a sensor failure, a signal input / output failure, or a disconnection. When this occurs, the opening of the electric throttle valve may be set to close in some cases. In that case, when the engine output is limited to prevent slipping of the drive wheels at low speeds such as when the vehicle starts, there is a possibility that engine stall will occur due to insufficient intake air flow due to a decrease in the opening of the electric throttle valve. is there.
[0005]
  The present invention has been made in view of such a point, and an object of the present invention is to set the throttle opening when an abnormality occurs in the engine temperature detection system to a predetermined condition. Even if there is an abnormality, there is an attempt to prevent the engine stall due to the restriction of the engine output at low speed by securing a large intake flow rate to the engine.
[0006]
[Means for Solving the Problems]
  In order to achieve the above object, according to the first aspect of the present invention, when the engine temperature detection system is abnormal, the minimum opening of the electric throttle valve is fixed to the opening when the engine temperature is low.
[0007]
  That is, in the present invention, as shown in FIG. 1, the intake air flow rate to the engine 1 is adjusted.And the minimum opening is set according to the engine temperature.Electric throttle valve 13And a mechanical throttle valve 12 that is opened and closed in conjunction with the accelerator pedal 21 and whose fully closed position changes according to the engine temperature, is arranged in series in the intake passage 9 of the engine 1.This is based on the engine output control device.
[0008]
  Furthermore, when an abnormality determination unit 41 that determines that an abnormal state has occurred in the detection system that detects the engine temperature and an output signal of the abnormality determination unit 41 are received and an abnormal state of the engine temperature detection system is determined, Opening degree fixing means 42 for fixing the minimum opening degree of the electric throttle valve 13 to the opening degree when the engine temperature is low;When the engine throttle opening degree detecting means 32 for detecting the opening degree of the mechanical throttle valve 12 and the control system of the electric throttle valve 13 are abnormal, the fuel of the engine 1 is limited so that the output of the engine 1 is limited. In response to the output signal of the fail-safe means 43 for controlling at least one of the supply system and the ignition system and the mechanical throttle opening degree detecting means 32, the opening degree of the mechanical throttle valve 12 detected by the detecting means 32 is in a fully closed state. Fail-safe releasing means 44 for stopping the operation of the fail-safe means 43 whenIs provided.
[0009]
  When the engine temperature detection system is determined to be in an abnormal state, the opening degree fixing means 42 sets the fully closed opening degree of the mechanical throttle valve 12 detected by the mechanical throttle opening degree detection means 32 to a low engine temperature. It is configured to be fixed at the opening degree.
[0010]
  Claim2In the invention, the opening degree fixing means 42 is configured to correct the minimum opening degree of the electric throttle valve 13 to be small as time elapses from the time of abnormality determination of the engine temperature detection system.
[0011]
[Action]
  With the above configuration, according to the first aspect of the present invention, when an abnormal state occurs in the detection system for detecting the engine temperature, the abnormality determining unit 41 determines that an abnormal state has occurred, and the output signal from the abnormality determining unit 41 is received. By the degree fixing means 42, the minimum opening degree of the electric throttle valve 13 is fixed to the opening degree when the engine temperature is low. Since the opening when the engine temperature is low is not fully closed, but more open than that, even if there is an abnormality in the engine temperature detection system, the minimum opening of the electric throttle valve 13 is ensured to be large. Therefore, even when the electric throttle valve 13 is closed and the engine output is limited to prevent slipping of the driving wheel at a low speed such as when the vehicle is started, the minimum opening of the electric throttle valve 13 is open. As a result, there is no shortage of the intake flow rate, and engine stall can be prevented.
[0012]
  Moreover, the aboveWhen an abnormality occurs in the control system of the electric throttle valve 13, the fail-safe means 43 controls at least one of the fuel supply system or the ignition system of the engine 1 to limit the increase in the output torque of the engine 1. Thereafter, when the mechanical throttle opening degree detecting means 32 detects that the mechanical throttle valve 12 is fully closed, the fail-safe releasing means 44 is activated and the fail-safe means 43 is stopped. When an abnormal state of the engine temperature detection system is determined, the fully closed opening degree of the mechanical throttle valve 12 detected by the mechanical throttle opening degree detecting means 32 is determined by the opening degree fixing means 42 when the engine temperature is low. The opening is fixed. For this reason, even if the actual opening degree of the mechanical throttle valve 12 is reduced due to an abnormal state of the engine temperature detection system, the fail-safe release means 44 operates reliably and the operation of the fail-safe means 43 is released. In addition, it is possible to prevent deterioration in the running performance and reliability of the vehicle.
[0013]
  Claim2In the present invention, the minimum opening degree of the electric throttle valve 13 is corrected by the opening degree fixing means 42 according to the passage of time from the abnormality determination of the engine temperature detection system. The range of engine output reduction can be increased.
[0014]
【Example】
  Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows the overall configuration of the embodiment of the present invention. In the figure, reference numeral 1 denotes an engine mounted on a vehicle, a cylinder block 3 having a cylinder 2, a cylinder head 4 assembled on the upper surface thereof, a piston 6 fitted in the cylinder 2 so as to be reciprocally movable, A connecting rod 7 for connecting the piston 6 to a crankshaft (not shown) is provided, and a combustion chamber 8 surrounded by the piston 6 and the cylinder head 4 is formed in the cylinder 2.
[0015]
  Reference numeral 9 denotes an intake passage for supplying intake air (air) to the combustion chamber 8, and an upstream end of the intake passage 9 is connected to an air cleaner 10. In the intake passage 9, an air flow meter 11 that detects the amount of intake air, an electric throttle valve 13 as a sub-throttle valve that throttles the intake passage 9, a mechanical throttle valve 12 as a main throttle valve, and an injector 14 that injects and supplies fuel Are arranged in series in order from the upstream side. A surge tank 15 is formed on the downstream side of the mechanical throttle valve 12, and an intake valve 16 opens and closes an opening of the intake passage 9 to the combustion chamber 8. Reference numeral 17 denotes an ignition plug for igniting intake air in the combustion chamber 8, and 18 denotes an exhaust passage for exhausting the exhaust gas in the combustion chamber 8. An opening to the combustion chamber 8 is opened and closed by an exhaust valve 19.
[0016]
  The mechanical throttle valve 12 is normally closed, and its support shaft 12a is connected to an accelerator pedal 21 via a connecting mechanism 20 such as a link or a wire. The opening of the valve 12 is increased to increase the intake flow rate into the combustion chamber 8 of the engine 1. The mechanical throttle valve 12 is connected to a thermostat (not shown), and the fully closed position of the mechanical throttle valve 12 is changed by the thermostat in accordance with the engine temperature (cooling water temperature).
[0017]
  On the other hand, the electric throttle valve 13 is normally held in a fully open position by a return spring (not shown), and a stepping motor 23 as an electric actuator is connected to the support shaft 13a via a connecting mechanism 22. For example, when the output torque of the engine 1 is lowered to perform traction control when the vehicle is started, the opening of the electric throttle valve 13 is reduced by the operation of the stepping motor 23 to the combustion chamber 8 of the engine 1. The intake flow rate is reduced.
[0018]
  The stepping motor 23 of the electric throttle valve 13 is controlled by a throttle valve control unit 26. The throttle valve control unit 26 includes an engine control unit 27 for controlling various state quantities of the engine 1 including the ignition timing by the spark plug 17 and the fuel injection amount by the injector 14 and wheels (not shown) when the vehicle is braked. ) To prevent slipping due to locking, and brake the driving wheel when the driving wheel (for example, rear wheel) slips during acceleration of the vehicle or the like, or reduce the output torque of the engine 1 to reduce the slip. Signals are connected to the ABS / TRC control unit 28 for suppression. The engine control unit 27 is connected to the ABS / TRC control unit 28 so as to be able to exchange signals.
[0019]
  The throttle valve control unit 26 and the ABS / TRC control unit 28 are supplied with an output signal of an electric throttle opening sensor 31 that detects the opening of the electric throttle valve 13.
[0020]
  Further, the engine control unit 27 includes an output signal of the air flow meter 11, an output signal of a mechanical throttle opening sensor 32 serving as a mechanical throttle opening detecting means for detecting the opening of the mechanical throttle valve 12, and the engine 1. At least an output signal of the rotation sensor 33 for detecting the engine speed based on the rotation of the crankshaft and an output signal of the water temperature sensor 30 for detecting the cooling water temperature as the temperature of the engine 1 are inputted. For example, various signals such as an atmospheric pressure signal, an intake air temperature signal, an electric load signal such as an alternator, an air conditioner signal indicating an operating state of the vehicle-mounted air conditioner, a starter operating signal, and an ignition key switch signal are input.
[0021]
  Further, the ABS / TRC control unit 28 includes output signals from the mechanical throttle opening sensor 32 and the water temperature sensor 30, an output signal from the drive wheel speed sensor 34 that detects the rotational speed of the drive wheel of the vehicle, and non-drive. The output signal of the non-driven wheel speed sensor 35 that detects the rotation speed of the wheel and the output signal of the TRC / OFF switch 36 for stopping the execution of the traction control are input. The ABS / TRC control unit 28 includes an actuator 37 for controlling the brake hydraulic pressure of the brake device 24 having the brake pedal 24a, a TRC indicator lamp 38 that lights up that traction control is being executed, It is connected at least to a TRC warning lamp 39 indicating that the control is in an abnormal state.
[0022]
  Here, the control operation performed when the electric throttle valve 13 is controlled in the control units 26 to 28 will be described with reference to FIGS. First, after the ignition key switch is turned ON in the first step S1 after the start, the sensor value (voltage) output from the water temperature sensor 30 is read, and in step S3, the sensor value is above the upper limit value or the lower limit value. Determine if it is below the value. When this determination is NO, it is determined in step S4 whether or not the engine value is lower than the set value and the engine speed of the predetermined number of revolutions or more continues for a certain period of time. Find out if it continues for a certain amount of time. When this determination is NO, the engine coolant temperature detection system is considered to be in a normal state, and the process proceeds to steps S5 to S10. That is, in step S5, the minimum opening A of the electric throttle valve 13 corresponding to the coolant temperature is determined as shown in FIG. 6, and in the next step S6, it is determined whether or not a traction control execution signal is output. If this determination is NO, the routine ends. If YES, the target opening of the electric throttle valve 13 is compared with the minimum opening A in step S7. If the target opening is less than the minimum opening A, the electric throttle valve When the opening degree 13 is set to the minimum opening degree and the target opening degree is larger than the minimum opening degree A, the opening degree is set as the target opening degree, and then the process proceeds to step S8. In step S8, it is determined whether or not a traction control OFF signal is output. If this determination is NO, the mechanical throttle valve 12 is fully closed based on the output value of the mechanical throttle opening sensor 32 in step S9. Whether the state has been reached is determined. If this determination is NO, the process returns to step S8. When both the determinations at steps S8 and S9 are YES, the process proceeds to step S10, the electric throttle valve 13 is opened, and the process ends.
[0023]
  When both of the determinations in steps S3 and S4 are YES, it is determined in step S11 that the water temperature sensor 30 has failed, and the cooling water temperature detection system is considered to be in an abnormal state. First, in step S12, the opening of the electric throttle valve 13 is fixed to the fully closed opening when the cooling water temperature is low, and in step S13, the fully closed opening of the mechanical throttle valve 12 detected by the mechanical throttle opening sensor 32 is detected. Is fixed at the fully closed opening when the cooling water temperature is low, and then the process proceeds to step S14 shown in FIG. 3 to determine whether or not an abnormality has occurred in the control system of the electric throttle valve 13. When this determination is NO, the routine proceeds to step S15, where it is determined whether or not a traction control execution signal is output. When this determination is NO, the process ends. When YES, the target opening of the electric throttle valve 13 is determined at step S16. When the target opening is equal to or less than the fixed opening, the degree of opening of the electric throttle valve 13 is set to the fixed opening, and the target opening is larger than the fixed opening. Sometimes the same opening is set as the target opening, and then the process proceeds to step S17. In this step S17, it is determined whether or not the slip of the driving wheel has been terminated by traction control. If the determination is NO, the process proceeds to step S25 described later. If YES, a traction control OFF signal is output in step S18. It is determined whether or not. When this determination is NO, it is determined at step S19 whether the mechanical throttle valve 12 has been fully closed as in step S9. When this determination is NO, the process returns to step S18. When both the determinations at steps S18 and S19 are YES, the process proceeds to step S20, the electric throttle valve 13 is opened, and the process ends.
[0024]
  If it is determined YES in step S14 due to an abnormality in the control system of the electric throttle valve 13, the process proceeds to step S21 shown in FIG. 4 to determine whether traction control is being performed. If this determination is YES, it is determined in step S22 whether or not the opening of the electric throttle valve 13 is at the target opening. If this determination is YES, the process proceeds to step S17 (see FIG. 3). On the other hand, if the determination in step S21 is NO, it is determined in step S23 whether or not a traction control execution signal is output. If this determination is NO, the process proceeds to step S28 described later. If YES, the process proceeds to step S24. It is determined whether or not the throttle valve 13 is operable. When the determination is “YES in the electric throttle valve operable”, the process proceeds to step S16 (see FIG. 3), whereas when the determination is NO, the engine 1 is determined in step S25. Backup control for limiting the increase in the output torque of the engine 1 is performed by controlling the fuel supply system and the ignition system. Specifically, in this backup control, the ignition timing of the engine 1 is retarded to reduce its output torque, and at the same time, the fuel injection amount from the injector 14 is increased to lower the exhaust gas temperature. It should be noted that the ignition timing and the fuel injection amount may be changed to preset fixed values so that the vehicle speed does not exceed a predetermined vehicle speed.
[0025]
  After this step S25, in step S26, it is determined whether or not the opening of the mechanical throttle valve 12 is equal to or less than the fixed value of the fully closed opening of the mechanical throttle opening sensor 32 set in step S13. If NO, the process returns to step S25. When the determination in step S26 is YES, in step S27, the backup control is canceled and the electric throttle valve 13 is opened. Thereafter, the TRC warning lamp 39 is turned on in step S28, and in the next step S29, the electric throttle valve is turned on. After the 13 control systems are brought down, the process is terminated.
[0026]
  In the above control flow, the minimum opening of the electric throttle valve 13 is set according to the coolant temperature as the engine temperature in step S5.
[0027]
  Further, steps S3 and S4 constitute an abnormality determining means 41 for determining that an abnormal state has occurred in the detection system for detecting the coolant temperature as the engine temperature.
[0028]
  When the output signal of the abnormality determining means 41 is received in steps S12 and S13 and an abnormal state of the engine coolant temperature detection system is determined, the minimum opening of the electric throttle valve 13 is set to the value when the coolant temperature is low. The opening degree fixing means 42 is configured to fix the opening degree of the mechanical throttle valve 12 detected by the mechanical throttle opening degree sensor 32 to the opening degree when the cooling water temperature is low. Is configured.
[0029]
  Further, when an abnormality occurs in the control system of the electric throttle valve 13 in step S25, the fail-safe means 43 for controlling the fuel supply system and the ignition system of the engine 1 so as to limit the increase in the output torque of the engine 1 is provided. It is configured.
[0030]
  Furthermore, in steps S26 and S27, the output of the mechanical throttle opening sensor 32 is received, and when the mechanical throttle valve 12 is fully closed, the fail-safe releasing means 44 for stopping the operation of the fail-safe means 43. Is configured.
[0031]
  Therefore, in the above embodiment, when the cooling water temperature detection system that detects the cooling water temperature as the engine temperature is normal, the vehicle that increases the output torque of the engine 1 by opening the mechanical throttle valve 12 by depressing the accelerator pedal 21. When a drive wheel slip occurs at the start of the vehicle, the occurrence of the slip is detected based on the speed difference between the drive wheel and the non-drive wheel, and the electric throttle valve 13 is closed to suppress the intake flow rate to the engine 1. By restricting the increase in the output torque of the engine 1, slipping of the drive wheel is prevented. At this time, as indicated by a one-dot chain line in FIG. 6, the sensor value of the mechanical throttle opening sensor 32 for detecting the minimum opening of the electric throttle valve 13 and the opening of the mechanical throttle valve 12 is the engine 1. The cooling water temperature varies depending on the cooling water temperature, and is set to increase as the cooling water temperature decreases.
[0032]
  On the other hand, when there is an abnormality in the cooling water temperature detection system, the minimum opening of the electric throttle valve 13 is fixed to the opening when the cooling water temperature is low, as shown by the solid line in FIG. . Since the opening when the cooling water temperature is low is not fully closed, but more open than that, even if the cooling water temperature detection system is abnormal, the minimum opening of the electric throttle valve 13 is ensured to be large. Will be. As a result, even when traction control is performed to close the electric throttle valve 13 and limit the engine output to prevent slipping of the driving wheel at low speeds such as when the vehicle starts, the minimum opening degree of the electric throttle valve 13 is opened. Since it is held in a relaxed manner, there is no shortage of the intake air flow rate to the engine 1, and engine stall can be prevented.
[0033]
  When an abnormality occurs in the control system of the electric throttle valve 13, when the electric throttle valve 13 is operable during the traction control, the throttle valve 13 is moved to the closing side, which causes the slip of the drive wheel. It is determined whether or not is closed. When the electric throttle valve 13 is inoperable or when the drive wheel slip is not terminated even when the electric throttle valve 13 is operable, backup control is performed as fail-safe, the ignition timing of the engine 1 is retarded, and the engine 1 Increase in output torque is limited. At this time, the fuel injection amount from the injector 14 is increased, and the rise in the exhaust gas temperature is suppressed. Thereafter, when the accelerator pedal 21 is returned and the opening degree of the mechanical throttle valve 12 detected by the mechanical throttle opening degree sensor 32 is fully closed, the backup control is stopped.
[0034]
  At that time, when the cooling water temperature detection system is abnormal, the fully closed opening degree of the mechanical throttle valve 12 by the mechanical throttle opening sensor 32 is fixed to the opening degree when the cooling water temperature is low, as shown by the solid line in FIG. The That is, even when the actual opening of the mechanical throttle valve 12 is small due to an abnormal state of the coolant temperature detection system, the fully closed opening by the mechanical throttle opening sensor 32 is fixed to a large value. Therefore, the backup control by the ignition timing retard of the engine 1 is surely stopped, and this makes it possible to prevent the running performance and reliability of the vehicle from being deteriorated.
[0035]
  In the above embodiment, the minimum opening of the electric throttle valve 13 and the fully closed opening (sensor value) of the mechanical throttle valve 12 by the mechanical throttle opening sensor 32 are set to a fixed value, but as shown in FIG. In addition, this fixed value may be corrected so as to become smaller with the passage of time since the abnormality determination of the cooling water temperature detection system. By doing so, it is possible to increase the range of engine output reduction while preventing engine stall, and to minimize deterioration in traction control performance.
[0036]
  In the above embodiment, the cooling water temperature is used as the engine temperature. In addition to this, the lubricating oil temperature of the engine 1 may be detected as the engine temperature, and the same effects as those in the above embodiment can be achieved. it can.
[0037]
  Further, in the above embodiment, the output torque of the engine 1 is limited by retarding the ignition timing, but the same purpose may be achieved by controlling the fuel injection amount from the injector 14, Both ignition timing control and fuel injection amount control may be combined.
[0038]
  In the above embodiment, the electric throttle valve 13 is disposed on the upstream side of the intake passage 9 with respect to the mechanical throttle valve 12. However, the electric throttle valve 13 may be disposed on the downstream side of the intake passage 9. The same effects as those in the above embodiment can be obtained.
[0039]
【The invention's effect】
  As described above, according to the first aspect of the present invention, the electric throttle valve for adjusting the intake flow rate by opening and closing the intake passage of the engine is provided, and the minimum opening of the electric throttle valve is set according to the engine temperature. When an abnormal state occurs in the detection system for detecting the engine temperature, the minimum opening degree of the electric throttle valve is fixed to the set opening degree when the engine temperature is low. Even if there is an abnormality in the engine, the minimum opening of the electric throttle valve can be corrected to be more open than when it is fully closed. When restricting the engine, it is possible to prevent the engine stall by preventing the intake air flow from becoming insufficient.Moreover,A mechanical throttle valve that opens and closes in conjunction with the accelerator pedal and whose fully closed position changes depending on the engine temperature is arranged in the intake passage in series with the electric throttle valve, and the mechanical throttle valve opening degree is detected by detecting the opening degree of the mechanical throttle valve. Detecting means and fail-safe means for controlling at least one of an engine fuel supply system or an ignition system so as to limit engine output when an abnormality occurs in the control system of the electric throttle valve; When the opening degree of the mechanical throttle valve detected by the degree detection means is fully closed, the operation of the fail-safe means is stopped, and when an abnormal state of the engine temperature detection system is determined, The fully closed opening of the mechanical throttle valve by the mechanical throttle opening detecting means is fixed to the opening when the engine temperature is low. With this configuration, even if the actual opening of the mechanical throttle valve has become smaller due to the occurrence of an abnormality in the engine temperature detection system, the fail-safe means can be reliably stopped to improve vehicle running performance and reliability. Deterioration can be prevented in advance.
[0040]
  Claim2According to the invention of the present invention, the minimum opening of the electric throttle valve is corrected to be small according to the passage of time from the abnormality determination of the engine temperature detection system, so that the engine output is reduced while preventing the engine stall. Can be increased.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of the present invention.
FIG. 2 is a flowchart showing a part of a signal processing operation for controlling an electric throttle valve by a control unit according to an embodiment of the present invention.
FIG. 3 is a flowchart showing the remaining half of the signal processing operation in the control unit.
FIG. 4 is a flowchart showing the other half of the remaining part of the signal processing operation in the control unit.
FIG. 5 is a configuration diagram showing an overall configuration of an embodiment of the present invention.
FIG. 6 is a characteristic diagram showing a sensor value of a mechanical throttle opening sensor that changes according to an engine water temperature and a characteristic of a minimum opening of an electric throttle valve.
FIG. 7 is a characteristic diagram showing characteristics in which the fixed value of the sensor value from the mechanical throttle opening sensor and the minimum opening of the electric throttle valve change with time when the cooling water temperature detection system is abnormal.
[Explanation of symbols]
  1 engine
  9 Air intake passage
  12 Mechanical throttle valve
  13 Electric throttle valve
  14 Injector
  17 Spark plug
  21 Accelerator pedal
  23 Stepping motor
  26-28 control unit
  30 Water temperature sensor
  31 Electric throttle opening sensor
  32 Mechanical throttle opening sensor (Mechanical throttle opening detection means)
  41 Abnormality determination means
  42 Opening fixing means
  43 Fail-safe measures
  44 Fail-safe canceling means

Claims (2)

An electric throttle valve that adjusts the intake air flow to the engine and sets a minimum opening according to the engine temperature; a mechanical throttle valve that opens and closes in conjunction with the accelerator pedal and changes its fully closed position according to the engine temperature; In the engine output control device arranged in series with the intake passage of the engine,
An abnormality determining means for determining that an abnormal state has occurred in the detection system for detecting the engine temperature;
An opening fixing means for fixing the minimum opening of the electric throttle valve to the opening when the engine temperature is low, when an output signal of the abnormality determining means is received and an abnormal state of the engine temperature detection system is determined ;
Mechanical throttle opening detecting means for detecting the opening of the mechanical throttle valve;
Fail-safe means for controlling at least one of an engine fuel supply system or an ignition system so as to limit engine output when an abnormality occurs in the control system of the electric throttle valve;
Fail-safe releasing means for receiving an output signal of the mechanical throttle opening detecting means and stopping the operation of the fail-safe means when the opening degree of the mechanical throttle valve detected by the detecting means is fully closed; Provided,
When the engine temperature detection system is determined to be in an abnormal state, the opening degree fixing means sets the fully closed opening degree of the mechanical throttle valve detected by the mechanical throttle opening degree detection means to the opening degree when the engine temperature is low. An engine output control device characterized by being configured to be fixed . The engine output control apparatus according to claim 1 ,
The engine output control device is characterized in that the opening degree fixing means is configured to correct the minimum opening degree of the electric throttle valve to be small in accordance with the passage of time from the abnormality determination of the engine temperature detection system.

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