JP2015209139A - Engine start control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine start control apparatus capable of efficiently using the power of a battery.SOLUTION: Using a fact that a detected charge amount J detected by a charge amount detection part 13a is equal to or more than a first threshold as a condition, a start control part 13c causes a vehicle travel on an output of a motor 12 and then start am engine 11. Using a fact that the detected charge amount J is less than the first threshold and is equal to or more than a second threshold that is set lower than the first threshold, as a condition, the detection part 13a causes a revolution speed of the engine 11 to reach a given revolution speed and then start the engine, and, using a fact that the detected charge amount J is less than the second threshold as a condition, starts the engine 11 on an output of the motor 12.

Description

  The present invention relates to an engine start control device, and more particularly to an engine start control device that starts an engine by a motor driven by electric power supplied from a battery.

  2. Description of the Related Art Conventionally, a motor using a motor generator (hereinafter referred to as a motor) having both functions of an electric motor and a generator is known as a motor serving as a drive source for running a vehicle.

  For example, Patent Document 1 below proposes a switch that can switch between running a vehicle with a motor or running a vehicle with an engine in accordance with the amount of charge of a battery.

  In the proposal of Patent Document 1, when the charge amount of the battery is equal to or greater than a predetermined amount, the vehicle is started and driven with relatively large power output from the motor, while the charge amount of the battery is less than the predetermined amount. In this case, the engine is started with relatively small power output from the motor, and the vehicle is started to run by the power output from the engine.

Japanese Patent No. 3447937

  However, in the one proposed in Patent Document 1 described above, since the control for switching from the vehicle running by the motor to the vehicle running by the engine is based on a predetermined amount of the charge amount of the battery, the charge amount of the battery Is less than the predetermined amount, all are switched to running of the vehicle by the engine. If the predetermined amount is set to a large value, even if the vehicle can be driven by the motor when the amount is below the predetermined amount, the vehicle is switched to driving by the engine, and the battery power cannot be used efficiently. There is a problem that there is.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an engine start control device that can efficiently use battery power.

  In order to solve the above problems, a first aspect of the present invention includes a motor that starts an engine, a battery that supplies electric power to the motor, a charge amount detection unit that detects a charge amount of the battery, and an engine start. An engine start control device comprising: a start control unit that controls the output of the motor on the condition that the detected charge amount detected by the charge amount detection unit is equal to or greater than a first threshold value; The engine is started after the vehicle is driven at the engine output with the output of the motor on the condition that the detected charge amount is less than the first threshold and not less than the second threshold set lower than the first threshold. The engine is started after the engine speed is increased to a predetermined speed, and the engine is started with the output of the motor on the condition that the detected charge amount is less than the second threshold value.

  According to a second aspect of the present invention, an air amount detection unit that detects an air amount in an intake pipe that circulates intake air supplied to an engine is provided, and the start control unit determines the amount of air detected by the air amount detection unit. The engine may be started with the output of the motor on condition that it is less than the fixed amount.

  According to the first aspect, the start control unit starts the engine after performing the so-called EV creep running on the condition that the detected charge amount is equal to or greater than the first threshold, and the detected charge amount is the first charge amount. The engine is started after so-called motoring on the condition that it is less than the threshold and greater than or equal to the second threshold, and the engine is started on the condition that the detected charge amount is less than the second threshold. ing. Therefore, the start control by the start control unit is executed based on detailed conditions corresponding to the detected charge amount, and the power of the battery is efficiently utilized.

  According to the second aspect, the start control unit starts the engine with the output of the motor on the condition that the air amount in the intake pipe detected by the air amount detection unit is less than a predetermined amount. Therefore, vibration generated when the engine is started can be reduced.

FIG. 1 is a schematic configuration diagram of an engine start control device according to an embodiment of the present invention. FIG. 2 is a flowchart showing a control operation of the engine start control device according to the embodiment of the present invention.

  Hereinafter, an engine start control device according to an embodiment of the present invention will be described with reference to the drawings.

First, the configuration will be described.
The engine start control device according to this embodiment is mounted on a vehicle 1. As shown in FIG. 1, the vehicle 1 includes an engine 11, a motor 12, an engine control unit (hereinafter referred to as ECU) 13, and a battery 14. The vehicle 1 is a so-called hybrid vehicle that is driven by a power source of at least one of the engine 11 and the motor 12.

  Further, the vehicle 1 includes a crankshaft pulley 21 provided on the crankshaft 11 a of the engine 11, a motor pulley 22 provided on a rotor shaft (not shown) of the motor 12, a belt 23, and a transmission ( T / M) 24. Further, the vehicle 1 includes a differential gear 25 connected to the transmission 24, left and right drive shafts 26 connected to the differential gear 25, and left and right drive wheels 27.

  In the present embodiment, a mechanism for transmitting and shutting off the output of a clutch or the like is provided between the components of the engine 11, the motor 12, the transmission 24, the differential gear 25, the left and right drive shafts 26, and the left and right drive wheels 27. However, when the motor 12 is driven, the output of the motor 12 is transmitted to the left and right drive wheels 27.

  The engine 11 is constituted by, for example, a four-cycle engine that performs a series of four strokes including an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke. The engine 11 includes an intake manifold 11b. An intake passage for supplying intake air into the engine 11 is formed in the intake manifold 11b.

  The motor 12 is composed of a motor generator (MG) having both the function of an electric motor serving as a drive source for running the vehicle 1 and the function of a generator that charges the battery 14 by power generation. The motor 12 includes a rotor (not shown), a rotor shaft, and a stator, and is driven by electric power supplied from the battery 14.

  A belt 23 is wound around the motor pulley 22 and the crankshaft pulley 21 described above, and the power of the motor 12 is transmitted to the crankshaft 11a of the engine 11 by the motor pulley 22, the crankshaft pulley 21 and the belt 23. .

  The ECU 13 is configured by a microcomputer. The microcomputer includes a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), a flash memory, an input port, an output port, and a network module. The network module can communicate with other electronic control units such as a transmission electronic control unit via a CAN (Controller Area Network).

  The ECU 13 executes arithmetic processing based on data and programs stored in the ROM. For example, when the ECU 13 detects that the accelerator is turned off while the vehicle 1 is traveling, the ECU 13 executes fuel injection cut control for cutting the fuel injection to the engine 11, and the vehicle speed is reduced to idle. When the condition necessary for the stop is satisfied, the engine 11 is stopped idling.

  The ECU 13 supplies power from the battery 14 to generate power in the motor 12 while continuing fuel injection cut control triggered by the release of the brake during idling stop. The power generated in the motor 12 is transmitted to the crankshaft 11a via the motor pulley 22, the belt 23, and the crankshaft pulley 21, whereby the engine 11 is motored.

  The power transmitted to the crankshaft 11a is input to the transmission 24, and is transmitted to the left and right drive wheels 27 via the differential gear 25 and the left and right drive shafts 26.

  The charge amount detection unit 13a includes sensors such as a current sensor (not shown) that detects current flowing out or inflow from the battery 14, and a voltage sensor (not shown) that detects a terminal voltage of the battery 14. Based on the detection value detected by the sensor, the charge amount detection unit 13a determines the current state of charge (SOC) of the battery 14, the so-called current remaining capacity, as a detected charge amount (hereinafter referred to as a detected charge amount J). )).

  The air amount detection unit 13b includes a sensor for detecting an air amount, such as an air amount sensor provided in an intake passage of an intake pipe (not shown), and detects the air amount in the intake pipe.

  The start control unit 13c performs an engine operation after running the vehicle 1 with the power output from the motor 12 on condition that the detected charge amount J detected by the charge amount detection unit 13a is equal to or greater than a predetermined first threshold value. 11 is started. In the present embodiment, the start control unit 13c satisfies the condition that the detected charge amount J is equal to or greater than a predetermined first threshold value and the pattern A that includes a plurality of conditions, so that the vehicle 1 is turned off when the accelerator is off. The engine 11 is started after so-called EV creep running, which is low-speed running, is performed for a predetermined time tmax.

  The first threshold value is the minimum charge amount of the battery 14 that enables EV creep running, and is a preset adaptive value.

Specifically, the pattern A condition includes an A1 condition or an A6 condition described below.
The A1 condition is that the air conditioner mounted on the vehicle 1 is OFF, and the A2 condition is that the detected charge amount J is equal to or more than the first threshold value. Further, the A3 condition is that the temperature of the cooling water for cooling the engine 11 is equal to or higher than a predetermined threshold, and the A4 condition is that the temperature of the ATF that is the hydraulic oil of the transmission 24 is equal to or higher than the predetermined threshold. It is that you are.

  Further, the A5 condition is that the slope of the road surface on which the vehicle 1 is traveling is within a predetermined threshold, and the A6 condition is that the electric load of the vehicle 1 is less than or equal to the predetermined threshold. . Each of these predetermined threshold values is an adapted value for the vehicle 1.

  The A1 condition and the A2 condition are based on the assumption that a load is applied to the motor 12 when the EV creep travel of the vehicle 1 and the start assist of the engine 11 are performed. Is set for.

  Further, in the A3 condition and the A4 condition, if the temperature of the cooling water or the ATF is high, the friction in the engine 11 or the transmission 24 is reduced, and the load applied to the motor 12 when performing EV creep running or start assist is reduced. It is set considering that.

  Further, the A5 condition is that when EV creep running is performed when the slope of the road surface is an uphill above a predetermined threshold, the load applied to the motor 12 increases more than usual, and EV creep running and start assist cannot be performed. It is set to avoid fears.

  The A6 condition is set to prevent excessive power consumption of the battery 14 and to prevent the battery 14 from being insufficiently charged or deteriorated. That is, when the electric load of the vehicle 1 is equal to or greater than a predetermined threshold, when the EV creep running or the start assist is performed by the start control unit 13c, the load due to the EV creep running or the start assist is added to the battery 14 in addition to the electric load. Therefore, the amount of charge of the battery 14 may be insufficient or deteriorate.

  Whether or not the electrical load is equal to or less than a predetermined threshold is determined by detecting the power supplied from the battery 14 by the operation of each element connected to the battery 14 and supplied with power, for example, by a sensor such as a current sensor. The detection value is compared with the reference value.

  In addition, the start control unit 13c outputs the power output from the motor 12 on condition that the detected charge amount J is less than the first threshold value and is equal to or greater than a predetermined second threshold value set lower than the first threshold value. Thus, the engine 11 is started with the power output from the motor 12 after the engine 11 has been rotated to a predetermined speed.

  The second threshold value is a value that serves as a reference for allowing the detected charging amount J to allow the above-mentioned start assist, and is a preset adaptive value. In the present embodiment, the start control unit 13c includes a condition that the detected charge amount J is less than the first threshold value and is equal to or more than a predetermined second threshold value set lower than the first threshold value, and a plurality of conditions. When the pattern B condition is satisfied, the start assist is executed.

  Specifically, the start assist performs motoring that raises the engine 11 to about the engine idling speed until the pressure in the intake manifold 11b of the engine 11 reaches a predetermined value. This is a start assist for starting the engine 11.

  The pressure in the intake manifold 11b is detected by a negative pressure sensor that detects the negative pressure in the intake manifold 11b.

  Since the pressure in the intake manifold 11b and the air amount in the intake manifold 11b are in a proportional relationship, the start controller 13c replaces the pressure in the intake manifold 11b with the air amount detected by the air amount sensor. Thus, the start assist may be executed. That is, the start control unit 13c performs motoring that raises the engine 11 to about the engine idling speed until the air amount in the intake manifold 11b of the engine 11 reaches a predetermined value, and the engine 12 is driven by the power output from the motor 12. 11 may be started.

  Specifically, the pattern B condition includes a B1 condition, an A3 condition, an A4 condition, an A5 condition, and an A6 condition. The B1 condition is that the detected charge amount J is equal to or greater than a predetermined threshold value that permits start assist.

  Note that the pattern B condition does not include the A1 condition, which is one of the pattern A conditions. During the execution of the idle stop that stops the engine when the predetermined condition is satisfied, the operation amount of the air conditioner, that is, the degree of cooling or heating becomes small, and the load applied to the battery 14 becomes relatively small. It is not necessary to include in the B condition. In addition, since the start assist control based on the pattern B condition is performed while the operation amount of the air conditioner is small, it is not necessary to include the A1 condition in the pattern B condition.

  In addition, during the start assist control under the pattern B condition, the amount of operation of the air conditioner is kept low even when the air conditioner is operating, and the load on the motor 12 is relatively small when executing the start assist under the pattern B condition. Therefore, it is not necessary to include the A1 condition in the pattern B condition.

  Further, the start control unit 13c starts the engine 11 with the power output from the motor 12 on condition that the detected charge amount J is less than the second threshold value. Specifically, the start control unit 13c starts the engine 11 with the power output from the motor 12 when the pattern C condition, which is a condition in which the pattern A condition and the pattern B condition are not satisfied, and Restart fuel injection.

  The start control unit 13c starts the engine 11 with the power output from the battery 14 on condition that the air amount in the intake pipe detected by the air amount detection unit 13b is less than a predetermined amount.

  The battery 14 is composed of a known secondary battery such as a lead storage battery or a lithium ion storage battery that supplies power to various electric loads of the vehicle 1 and elements such as the motor 12, and is sequentially charged and discharged.

  The transmission 24 is composed of a transmission that shifts the power generated by the engine 11, and includes a plurality of planetary gear mechanisms (not shown) and a plurality of friction engagement elements that constitute clutches and brakes (not shown). Yes. The transmission 24 forms a desired gear stage by changing the gripping of each friction engagement element in accordance with hydraulic fluid supplied from a hydraulic control device (not shown), thereby determining the gear ratio of the transmission 24. The

  The transmission 24 forms, for example, any one of six forward shift stages from 1st to 6th speed and one reverse shift stage. The power changed by the transmission 24 is transmitted to the differential gear 25.

  The differential gear 25 is connected to the left and right drive shafts 26, and the power input from the output shaft of the transmission 24 is transmitted from the left and right drive shafts 26 to the left and right drive wheels 27, respectively.

  Next, the operation of engine start control in the engine start control device of this embodiment will be described with reference to FIG.

  First, the ECU 13 determines whether or not the engine 11 is performing idling stop control (step S11). If the ECU 13 determines that the engine 11 is not performing idling stop control, the ECU 13 ends the operation. On the other hand, when the ECU 13 determines that the engine 11 is performing idling stop control, the ECU 13 determines whether or not a brake (not shown) of the vehicle 1 is OFF (step S12).

  When the ECU 13 determines that the brake is OFF in step S12, the ECU 13 acquires detection information such as the state of charge of the battery 14 detected by each sensor, the temperature level, and the magnitude of the electric load applied to the battery 14 ( Step S13).

  Next, the ECU 13 determines whether or not the pattern A condition is satisfied based on the acquired detection information (step S14). That is, the ECU 13 determines whether or not all of the A1 condition to the A6 condition are satisfied.

  When the ECU 13 determines that the pattern A condition is satisfied, the ECU 13 starts driving the motor 12, rotates the engine 11, and starts counting time (step S21). Subsequently, the ECU 13 determines whether or not an accelerator (not shown) of the vehicle 1 is ON (step S22).

  Here, if ECU13 judges that the accelerator of the vehicle 1 is ON, it will restart the fuel injection of the engine 11 (step S17), and will complete | finish operation | movement. On the other hand, when determining that the accelerator of the vehicle 1 is not ON, the ECU 13 determines whether or not the engine 11 is requested to forcibly start the engine such as a start switch ON (step S23).

  If the ECU 13 determines that the forced start is requested, the ECU 13 restarts the fuel injection of the engine 11 (step S17), starts the engine, and ends the operation. On the other hand, when determining that there is no request for forced engine start, the ECU 13 determines whether or not the duration t after the start of time counting exceeds the maximum EV creep travel time tmax (step S24).

  If the ECU 13 determines that the duration t does not exceed the maximum time tmax, the ECU 13 determines whether or not the accelerator of the vehicle 1 is ON (step S22). On the other hand, when the ECU 13 determines that the duration t exceeds the maximum time tmax, the ECU 13 restarts the fuel injection of the engine 11 (step S17), starts the engine, and ends the operation.

  If it is determined in step S14 that the pattern A condition is not satisfied, the ECU 13 determines whether or not the pattern B condition is satisfied (step S15). That is, the ECU 13 determines whether or not all of the B1 condition, the A3 condition, and the A6 condition are satisfied.

  When the ECU 13 determines that the pattern B condition is satisfied, the ECU 13 starts driving the motor 12 and rotates the engine 11 (step S31). Subsequently, the ECU 13 determines whether or not the accelerator of the vehicle 1 is ON (step S32).

  If ECU13 judges that the accelerator of the vehicle 1 is ON, it will restart the fuel injection of the engine 11 (step S17), and will complete | finish operation | movement. When the ECU 13 determines that the accelerator of the vehicle 1 is not ON, the ECU 13 determines whether there is a request for forced engine start such as a start switch ON for the engine 11 (step S33). When the ECU 13 determines that there is a request for forced start, the ECU 13 restarts fuel injection of the engine 11 (step S17), starts the engine, and ends the operation.

  When determining that there is no request for forced engine start, the ECU 13 determines whether or not the pressure p in the intake manifold 11b of the engine 11 is equal to or lower than a pressure pth at which fuel injection is permitted (step S34). When the ECU 13 determines that the pressure p is not equal to or lower than the pressure pth, the ECU 13 determines again whether or not the accelerator of the vehicle 1 is ON (step S32). If ECU13 judges that the pressure p is below the pressure pth, it will restart the fuel injection of the engine 11 (step S17), will start an engine, and will complete | finish operation | movement.

  If the ECU 13 determines in step S15 that the pattern B condition is not satisfied, the ECU 13 starts driving the motor 12 and rotates the engine 11 (step S16). The ECU 13 resumes fuel injection immediately after the start of rotation of the engine 11 (step S17), starts the engine, and ends the operation.

Since the engine start control device of the present embodiment is configured as described above, the following effects can be obtained.
That is, the engine start control device of the present embodiment includes a charge amount detection unit 13a and a start control unit 13c. When the start control unit 13c has a large detected charge amount J, the EV creep travel is performed. When the detected charge amount J is small, the engine 11 is started. When the detected charge amount J is medium, the engine 11 is started after motoring.

  As a result, since the start control is executed based on detailed conditions corresponding to the detected charge amount J, the power of the battery 14 is more efficiently utilized, and further, the battery 14 is prevented from deteriorating. The durability of the battery 14 is further improved.

  Specifically, in the engine start control device of the present embodiment, in the pattern A condition, the air conditioner mounted on the vehicle 1 is OFF (A1 condition) and the detected charge amount J permits EV creep running. The condition is that it is equal to or greater than a predetermined threshold value (A2 condition).

  As a result, the engine start control device of the present embodiment can avoid the case where the EV creep travel cannot be performed sufficiently, and can ensure the detected charge amount J and perform the EV creep travel. Therefore, the power of the battery 14 is utilized more efficiently, the deterioration of the battery 14 is prevented, and the durability of the battery 14 is further improved.

  Further, in the engine start control device of the present embodiment, in the pattern A condition, the temperature of the cooling water for cooling the engine 11 is equal to or higher than a predetermined threshold (A3 condition), and the ATF temperature of the transmission 24 is a predetermined threshold. This is the condition (A4 condition).

  As a result, EV creep travel is possible in a state where friction in the engine 11 and the transmission 24 is reduced. Therefore, the engine start control device of the present embodiment can perform EV creep travel without burden on the battery 14. The battery 14 can be prevented from deteriorating and the durability of the battery 14 can be further improved.

  In addition, since the engine start control device of the present embodiment is based on the condition that the gradient of the road surface on which the vehicle 1 is traveling is within a predetermined threshold (A5 condition) in the pattern A condition, the EV creep travel is performed. The inability to do so is avoided.

  That is, when the EV creep travel is performed when the road surface slope is an uphill that is equal to or greater than a predetermined threshold, the load on the motor 12 increases more than usual, and thus EV creep travel cannot be performed. The engine start control device of the present embodiment can continue the EV creep running by satisfying the A5 condition.

  Further, the engine start control device of the present embodiment is based on the condition that the electric load of the vehicle 1 is not more than a predetermined threshold (A6 condition) in the pattern A condition. Thus, the start control by the start control unit 13c is avoided, and excessive power consumption is prevented, and the amount of charge of the battery 14 is prevented from being insufficient or deteriorated.

  In addition, when the pattern B condition is satisfied, the engine start control device of the present embodiment controls the rotation speed of the engine 11 with the power output from the motor 12 until the pressure in the intake manifold 11b of the engine 11 reaches a predetermined value. After motoring to increase the engine speed to a predetermined number of revolutions, start assist control of the engine 11 is executed.

  As a result, the engine start control device of the present embodiment can suppress the amount of output torque generated at the time of engine start and suppress vibration at the time of engine start.

  The engine start control device of the present embodiment includes the B1 condition and the A3 or A6 condition in the pattern B condition, so that the start assist can be performed reliably and the power of the battery 14 is utilized more efficiently. In addition, the durability of the battery 14 can be further improved by preventing the battery 14 from deteriorating.

  Further, since the detected charge amount J is based on the pattern C condition, the engine start control device of the present embodiment avoids excessive EV creep travel and start assist when the detected charge amount J is small. The engine 11 can be started with the power output from the engine 14. As a result, excessive consumption of the battery 14 can be avoided, the battery 14 can be prevented from deteriorating, and the durability of the battery 14 can be further improved.

  In addition, the engine start control device of the present embodiment starts the engine 11 with the power output from the battery 14 on condition that the air amount in the intake pipe detected by the air amount detection unit 13b is less than a predetermined amount. As a result, vibration of the engine 11 can be further reduced when the engine 11 is started.

  The engine start control device according to the present embodiment can suppress the power consumption particularly when the power of the battery 14 is not sufficient, so that the frequency of idling stop can be ensured, and consequently the fuel consumption of the engine 11 can be ensured. Can be improved.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

11 Engine 12 Motor 13 ECU
13a Charge amount detection unit 13b Air amount detection unit 13c Start control unit 14 Battery J Detected charge amount

In order to solve the above problems, a first aspect of the present invention includes a motor that starts an engine, a battery that supplies electric power to the motor, a charge amount detection unit that detects a charge amount of the battery, and an engine start. An engine start control device comprising: a start control unit that controls the output of the motor on the condition that the detected charge amount detected by the charge amount detection unit is equal to or greater than a first threshold value; The engine is started after the vehicle is driven at the engine output with the output of the motor on the condition that the detected charge amount is less than the first threshold and not less than the second threshold set lower than the first threshold. and a one to start the engine after being raised to a predetermined rotational speed a rotational speed of the.
As a second aspect of the present invention, the start control unit may start the engine with the output of the motor on the condition that the detected charge amount is less than the second threshold value.

According to a third aspect of the present invention, there is provided an air amount detection unit that detects an air amount in an intake pipe through which intake air to be supplied to an engine is circulated, and the start control unit determines the amount of air detected by the air amount detection unit. The engine may be started with the output of the motor on condition that it is less than the fixed amount.

According to the first aspect, the start control unit starts the engine after performing the so-called EV creep running on the condition that the detected charge amount is equal to or greater than the first threshold, and the detected charge amount is the first charge amount. it is less than the threshold value, and on condition that the second threshold or more, and the engine is started after performing a so-called motoring. Therefore, the start control by the start control unit is executed based on detailed conditions corresponding to the detected charge amount, and the power of the battery is efficiently utilized.
According to the second aspect, the start control unit starts the engine on the condition that the detected charge amount is less than the second threshold value. Therefore, the start control by the start control unit is executed based on detailed conditions corresponding to the detected charge amount, and the power of the battery is efficiently utilized.

According to the third aspect, the start control unit starts the engine with the output of the motor on the condition that the air amount in the intake pipe detected by the air amount detection unit is less than a predetermined amount. Therefore, vibration generated when the engine is started can be reduced.

That is, when the gradient of the road surface is uphill than a predetermined threshold value, when the EV creep running, the load of the motor 12 is increased than usual, rows EV creep running Enakunaru. The engine start control device of the present embodiment can continue the EV creep running by satisfying the A5 condition.

Claims (2)

A motor for starting the engine;
A battery for supplying power to the motor;
A charge amount detection unit for detecting a charge amount of the battery;
A start control unit for controlling the start of the engine;
An engine start control device comprising:
The start control unit starts the engine after running the vehicle with the output of the motor, on condition that the detected charge amount detected by the charge amount detection unit is equal to or greater than a first threshold value,
On the condition that the detected charge amount is less than the first threshold value and greater than or equal to a second threshold value set lower than the first threshold value, the engine speed is set to a predetermined speed by the output of the motor. After starting up the engine,
An engine start control device that starts the engine with the output of the motor on condition that the detected charge amount is less than the second threshold value. Provided with an air amount detection unit for detecting an air amount in an intake pipe through which intake air to be supplied to the engine is circulated, wherein the start control unit is provided with a condition that the air amount detected by the air amount detection unit is less than a predetermined amount The engine start control device according to claim 1, wherein the engine is started by the output of the motor.

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