JP2018095040A - Start control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a start control device capable of reducing a fuel consumption, and avoiding such a situation in which traction force is insufficient in a start time.SOLUTION: A start control device 1 comprises: a weight detection part 21 for detecting weight of whole vehicle V; a gradient detection part 22 for detecting a gradient of a road surface where a vehicle V exists; an output possible work detection part 23 for detecting an output possible work of a motor 3; and a control part 30 for selecting control which is executed for start of a vehicle V. The control part 30 executes a first start control in which only drive force of the motor 3 is used, when a first value based on a sum based on a travel resistance work based on the weight and a gradient resistance work based on the gradient is smaller than a second value based on the output possible work, and executes a second start control in which drive forces of the engine 2 and the motor 3 are used, when a first value is equal to or larger than the second value, in start time of the vehicle V.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a start control device.

  As a start control method for a hybrid vehicle including an engine and a motor, for example, Patent Document 1 discloses a start control using only the driving force of a motor instead of the start control using the driving force of the engine and the motor when starting the vehicle. Is described as being performed.

JP 2007-236109 A

  In the start control using only the driving force of the motor, the output of the engine can be reduced and the fuel consumption can be reduced, but the traction force becomes smaller than in the case of the start control using the driving force of the engine and the motor. . For this reason, in the conventional start control method described above, when the load is large or the road surface is uphill, the driver may feel slack due to insufficient traction.

  In view of the above, an object of the present invention is to provide a start control device capable of reducing fuel consumption and avoiding insufficient traction during start.

  A start control device according to the present invention is a start control device that controls start of a vehicle including an engine and a motor, and detects a weight detection unit for detecting the weight of the entire vehicle and a gradient of a road surface on which the vehicle is located. Based on the detection result of the gradient detection unit, the output possible work detection unit for detecting the output possible work of the motor, at least the detection result of the weight detection unit, the detection result of the gradient detection unit, and the detection result of the output possible work detection unit A control unit that selects a control to be executed for the start of the vehicle, and the control unit has a first value based on a sum of the running resistance work based on the weight and the gradient resistance work based on the gradient at the start of the vehicle. When the first value is smaller than the second value based on the work that can be output, the first start control using only the driving force of the motor is executed. 2nd start To run the control.

  In this start control device, the first value based on the sum of the traveling resistance work based on the weight of the entire vehicle and the gradient resistance work based on the gradient of the road surface on which the vehicle is present is greater than the second value based on the work that can be output by the motor. When the first value is smaller, the first start control using only the driving force of the motor is executed, whereas when the first value is equal to or larger than the second value, the second start control using the driving force of the engine and the motor is performed. Is executed. Thereby, when sufficient traction force is obtained by the driving force of only the motor, the first start control is executed. Therefore, it is possible to reduce the output of the engine at the time of start of the vehicle and reduce the fuel consumption. Further, since the second start control is executed when the traction force is insufficient with the driving force of only the motor, even in such a case, sufficient traction force can be obtained using the driving force of the engine. Therefore, according to this start control device, it is possible to avoid a shortage of traction force at the start while reducing fuel consumption.

  The start control device of the present invention further includes an accelerator operation amount detection unit for detecting an accelerator operation amount, and the control unit has a predetermined value when the first operation value is smaller than the second value. When it is larger than the range, the second start control may be executed. Accordingly, since the second start control is executed when a large traction force is required, it is possible to reliably avoid a shortage of the traction force when starting.

  In addition, the start control device of the present invention further includes an acceleration detection unit for detecting the acceleration of the vehicle, and the control unit is configured such that when the first value is smaller than the second value and the acceleration is larger than a predetermined value. The second start control may be executed. As a result, the second start control is executed when the acceleration of the vehicle is greater than a predetermined value and it is difficult to detect the road surface gradient or the vehicle weight, so that it is more reliably avoided that the traction force is insufficient at the start. be able to.

  In the start control device of the present invention, the control unit executes the first start control when the first value when one of the weight and the gradient is the first fixed value is smaller than the second value, When the first value when one of the gradients is the first fixed value is greater than or equal to the second value, the second start control may be executed. Accordingly, it is possible to determine which of the first start control and the second start control is to be executed with one of the weight and the gradient as a fixed value.

  In the start control device of the present invention, the control unit has a first value when one of the weight and the gradient is a first fixed value, and a first value when the other of the weight and the gradient is a second fixed value. If both are smaller than the second value, the first start control is executed, the first value when one of the weight and the gradient is set as the first fixed value, and the other of the weight and the gradient is set as the second fixed value. If at least one of the first values is equal to or greater than the second value, the second start control may be executed. Accordingly, it is possible to determine which of the first start control and the second start control is to be executed with one and the other of the weight and the gradient being fixed values.

  The start control device of the present invention is a start control device for controlling start of a vehicle including an engine and a motor, and includes a detection unit for detecting one of the weight of the entire vehicle and the gradient of the road surface, An outputable work detection unit for detecting an outputable work, and a control unit that selects control to be executed when the vehicle starts based on at least the detection result of the detection unit and the detection result of the outputable work detection unit. The control unit assumes that the first value is a value based on the sum of the running resistance work based on the weight and the gradient resistance work based on the gradient, and the first value when the other of the weight and the gradient is a fixed value at the start of the vehicle. When the 1 value is smaller than the second value based on the work that can be output, the first start control using only the driving force of the motor is executed, and the first value when the other of the weight and the gradient is a fixed value is the first value. If it is 2 or more, The second run the starting control using the engine and the driving force of the motor.

  Also with this start control device, it is possible to avoid a shortage of traction force at the start while reducing the fuel consumption as in the above-described start control device.

  ADVANTAGE OF THE INVENTION According to this invention, it can avoid that tractive force is insufficient at the time of start, reducing fuel consumption.

It is a figure which shows the structure of the vehicle carrying the start control apparatus of embodiment. It is a flowchart which shows the process sequence of the start control apparatus of FIG. It is a graph for demonstrating assist start control. It is a graph for demonstrating motor start control. It is a flowchart which shows the process sequence of the start control apparatus of a modification.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the same reference numerals are used for the same or corresponding elements, and duplicate descriptions are omitted.

  The start control device 1 shown in FIG. 1 is a device for controlling the start of the vehicle V. The vehicle V is a hybrid vehicle including the engine 2 and the motor generator 3 as driving force sources. The vehicle V travels while appropriately switching the driving force source to be used and changing the ratio of the driving force from each driving force source as appropriate. The vehicle V is, for example, a plug-in hybrid vehicle that can supply power directly to a battery using an insertion plug. The vehicle V is a commercial vehicle such as a bus or a truck. The vehicle V is not particularly limited, and may be any of a large vehicle, a medium-sized vehicle, a normal passenger car, a small vehicle, a light vehicle, and the like. The vehicle V may be a hybrid vehicle other than the plug-in hybrid vehicle. Below, after demonstrating the structure of the vehicle V first, the structure of the start control apparatus 1 is demonstrated.

  The vehicle V includes an engine 2, a motor generator 3, an AMT (AMT: Automated Manual Transmission) 4, a battery 6, and an inverter 7. The AMT 4 includes a clutch 5, and the engine 2 and the motor generator 3 are connected to each other via the clutch 5.

  The engine 2 is, for example, a diesel engine or a gasoline engine. The operation of the engine 2 is controlled by an engine ECU (ECU: Electronic Control Unit) 11 that is communicably connected to the engine 2. The motor generator 3 is driven by the electric power of the battery 6 and functions as a driving force source for the vehicle V. In addition, when the accelerator is off, the regenerative braking force is applied to the wheels W of the vehicle V to generate electric power and charge the battery 6. It also functions as a generator.

  The AMT 4 is configured as a mechanical automatic transmission, and automatically performs a shift operation such as changing the gear position (shifting) and controlling the connection and disconnection of the clutch 5. The AMT 4 transmits the driving force of the engine 2 and the motor generator 3 to the wheels W via a propeller shaft, a differential gear, a drive shaft, and the like. More specifically, when the clutch 5 is separated, only the driving force of the motor generator 3 is transmitted to the wheels W and used as the driving force for propelling the vehicle V. On the other hand, when the clutch 5 is connected, the driving force of the engine 2 and the motor generator 3 is transmitted to the wheels W and used as the driving force for propelling the vehicle V. The operation of the AMT 4 is controlled by an AMT ECU 12 that is communicably connected to the AMT 4.

  The battery 6 is configured by connecting a plurality of secondary batteries to each other. As the battery 6, various secondary batteries, such as a lithium ion battery, can be used, for example. The battery 6 is charged with electric power supplied from the inverter 7. The state of the battery 6 is monitored by a battery ECU 13 that is communicably connected to the battery 6.

  Inverter 7 is electrically connected to motor generator 3 and battery 6. Inverter 7 converts electric power input from battery 6 into alternating current, and outputs the converted electric power to motor generator 3. Inverter 7 converts the electric power input from motor generator 3 into a direct current, and outputs the converted electric power to battery 6.

  Next, the configuration of the start control device 1 will be described. The start control device 1 includes a weight detection unit 21, a gradient detection unit 22, an outputable work detection unit 23, an acceleration detection unit 24, an accelerator operation amount detection unit 25, a direction instruction input detection unit 26, and a hazard input. The detector 27 and the HVECU 30 are provided. The weight detection unit 21, the gradient detection unit 22, the output possible work detection unit 23, the acceleration detection unit 24, the accelerator operation amount detection unit 25, the direction instruction input detection unit 26, and the hazard input detection unit 27 are connected to the HVECU 30 in a communicable manner. ing. The detection results by the weight detection unit 21 and the gradient detection unit 22 are updated each time the vehicle V stops, for example.

  The weight detection unit 21 is used to detect the weight of the entire vehicle V. Here, the total weight of the vehicle V is a weight obtained by adding a weight of a load loaded on the vehicle V, a weight of an occupant riding on the vehicle V, and the like to a vehicle weight that is a weight of the vehicle V filled with fuel. . For this reason, the weight of the vehicle V as a whole varies depending on the amount of luggage loaded on the vehicle V, the number of passengers on the vehicle V, and the like. Various known methods can be employed as a method for detecting the weight. As an example, there is a method of calculating the weight of the entire vehicle V based on a change in the acceleration of the vehicle V before and after shifting.

  The gradient detection unit 22 is used to detect the presence or absence and the magnitude of the gradient of the road surface on which the vehicle V is located (hereinafter also simply referred to as “road surface”). As a method for detecting this gradient, various known methods can be employed. As an example, a method of calculating a gradient based on the acceleration of the vehicle V is given.

  The outputable work detection unit 23 is used to detect an outputable work that is a work that can be output by the motor generator 3. In the present embodiment, the output work is calculated by the battery ECU 13. That is, the battery ECU 13 constitutes an output possible work detection unit 23. The work that can be output is calculated based on, for example, the state of charge (SOC) of the battery 6, the output limit value of the motor generator 3, the temperature of the motor generator 3, and the like.

  The acceleration detection unit 24 is used for detecting the acceleration of the vehicle V. The acceleration detection unit 24 is an acceleration sensor attached to the vehicle V, for example.

  The accelerator operation amount detector 25 is used to detect the accelerator operation amount. The accelerator operation amount detection unit 25 detects an operation amount of an operation lever for performing an accelerator operation, for example.

  The direction indication input detection unit 26 is used to detect an input to the direction indicator. The direction indication input detection unit 26 detects the on / off state of the left and right direction indicators, for example, by detecting the state of an operation lever for operating lighting of the direction indicators.

  The hazard input detection unit 27 is used to detect an input to the hazard lamp. The hazard input detection unit 27 detects on / off of an operation switch for operating, for example, lighting of a hazard lamp.

  The HVECU (control unit) 30 is configured by a computer including a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory), for example. For example, the HVECU 30 performs overall control for causing the vehicle V to function as a hybrid vehicle. Further, the HVECU 30 detects each of the weight detection unit 21, the gradient detection unit 22, the output work detection unit 23, the acceleration detection unit 24, the accelerator operation amount detection unit 25, the direction instruction input detection unit 26, and the hazard input detection unit 27. Based on the result, the control to be executed when the vehicle V starts is selected.

  Next, the process executed by the HVECU 30 when the vehicle V starts will be described with reference to the flowchart of FIG. The HVECU 30 starts the process of FIG. 2 when the accelerator is stepped on and the vehicle V starts, for example, when the vehicle is stopped. After starting the process, first, the HVECU 30 calculates the first value (step S1).

  The first value is calculated based on the sum of the travel resistance work based on the weight of the entire vehicle V and the gradient resistance work based on the road surface gradient. The traveling resistance work (acceleration resistance work) is a resistance that acts on the vehicle V when the vehicle V accelerates. The running resistance work is proportional to the weight of the entire vehicle V and the square of the vehicle speed. In the present embodiment, the HVECU 30 calculates a resistance acting on the vehicle V as a running resistance work after the vehicle V starts to accelerate to a predetermined speed. For example, the running resistance work is calculated on the assumption that the speed of the vehicle V has increased to a predetermined speed along a preset speed increase prediction line.

  The gradient resistance work is a resistance that acts on the vehicle when climbing an inclined road surface. The gradient resistance work is proportional to the weight and gradient of the entire vehicle V. The energy required for traveling of the vehicle V includes air resistance work and rolling resistance work in addition to the traveling resistance work and the gradient resistance work. However, when the vehicle V starts, the vehicle speed is small and the travel distance is also small. Since it is short, air resistance work and rolling resistance work can be ignored.

  In step S <b> 1, the HVECU 30 calculates the first value based on the detection result of the weight detection unit 21 and the detection result of the gradient detection unit 22. The first value may be the sum of the running resistance work and the gradient resistance work itself, or may be a value obtained by adding or multiplying the sum by a predetermined value, for example, when considering a buffer. The HVECU 30 refers to a map in which the weight and gradient of the entire vehicle V are associated with the first value, instead of calculating the first value based on the weight and gradient of the entire vehicle V. A first value may be obtained. This map is stored in advance in a storage area (for example, ROM) of the HVECU 30, for example.

  Subsequently, the HVECU 30 calculates the second value based on the detection result of the outputable work detection unit 23 (step S2). The second value is calculated based on the work that can be output from the motor generator 3. The second value may be the outputtable work itself of the motor generator 3, or may be a value obtained by adding or multiplying the outputtable work by a predetermined value when considering a buffer, for example.

  Subsequently, the HVECU 30 determines whether or not the first value is smaller than the second value (step S3). If it is determined that the first value is smaller than the second value (YES in step S3), the process proceeds to step S4. If it is determined that the first value is equal to or greater than the second value (NO in step S3). ) Proceeds to step S8.

  Subsequently, the HVECU 30 determines whether or not the direction indicator and the hazard lamp are not lit (step S4). As a result of the determination, if it is determined that both the direction indicator and the hazard lamp are not lit (YES in step S4), the process proceeds to step S5, and it is determined that at least one of the direction indicator and the hazard lamp is lit. If so (NO in step S4), the process proceeds to step S8.

  Subsequently, the HVECU 30 determines whether or not the accelerator operation amount is smaller than a predetermined value (step S5). As a result of the determination, when it is determined that the accelerator operation amount is smaller than the predetermined value (YES in step S5), the process proceeds to step S6, and when it is determined that the accelerator operation amount is greater than or equal to the predetermined value (NO in step S5). Advances to step S8. The predetermined value used for this determination is stored in advance in a storage area (for example, ROM) of the HVECU 30, for example.

  Subsequently, the HVECU 30 determines whether or not the acceleration of the vehicle V is smaller than a predetermined value (step S6). As a result of the determination, if it is determined that the acceleration of the vehicle V is smaller than the predetermined value (YES in step S6), the process proceeds to step S7, and if it is determined that the acceleration of the vehicle V is greater than or equal to the predetermined value (NO in step S6). ) Proceeds to step S8. The predetermined value used for this determination is stored in advance in a storage area (for example, ROM) of the HVECU 30, for example.

  In step S <b> 7, the HVECU 30 executes motor start control (first start control) using only the driving force of the motor generator 3. In step S8, the HVECU 30 executes assist start control (second start control) using the driving force of the engine 2 and the motor generator 3.

  The motor start control and assist start control will be described with reference to FIGS. 3 and 4. In the assist start control shown in FIG. 3, the clutch 5 is changed from the separated state to the half-clutch state simultaneously with the start. During the half-clutch state, in order to prevent engine stall, the rotational speed of the engine 2 is higher than the idle rotational speed, and the engine 2 generates torque (driving force). Then, when the rotational speed of the engine 2 and the rotational speed of the motor generator 3 (input shaft rotational speed) become the same, the clutch 5 is connected. That is, the clutch 5 is connected in a state where the rotational speed of the engine 2 is higher than the idle rotational speed. Switching from the motor generator 3 as the driving force source to the engine 2 is started substantially simultaneously with or slightly before the connection of the clutch 5. In the assist start control, since the driving force of the engine 2 is used in addition to the driving force of the motor generator 3, a sufficient traction force can be obtained.

  In the motor start control shown in FIG. 4, after the start of the start, first, the vehicle V is accelerated only by the driving force of the motor generator 3 with the clutch 5 separated. In a state where the clutch 5 is separated, the rotational speed of the engine 2 is substantially equal to the idle rotational speed, and the torque of the engine 2 is substantially equal to the friction torque. Then, when the rotation speeds of the engine 2 and the motor generator 3 become equal to each other at the idle rotation speed, the clutch 5 is connected. Switching from the motor generator 3 as the driving force source to the engine 2 is started substantially simultaneously with or slightly before the connection of the clutch 5. That is, the torque generated in the engine 2 increases, the torque generated in the motor generator 3 decreases, and the torque between the engine 2 and the motor generator 3 is replaced.

  In the motor start control, the half clutch time can be shortened as compared with the assist start control because the time to enter the half clutch state is only the time for engaging the clutch. Therefore, the heat loss generated in the engine 2 in the half clutch state can be reduced. Further, since the torque generated in the engine 2 before the clutch 5 is connected can be reduced, the fuel consumption can be reduced.

  In the start control device 1 described above, the first value based on the sum of the traveling resistance work based on the weight of the entire vehicle V and the gradient resistance work based on the gradient of the road surface on which the vehicle V is present is the work that can be output by the motor generator 3. If the first value is smaller than the second value, the motor start control using only the driving force of the motor generator 3 is executed. On the other hand, if the first value is greater than or equal to the second value, the engine 2 and the motor generator Assist start control using the driving force 3 is executed. As a result, when a sufficient traction force can be obtained by the driving force of only the motor generator 3, the motor start control is executed. Therefore, the output of the engine 2 at the start of the vehicle V is reduced to reduce the fuel consumption. Can do. Further, when the driving force of only the motor generator 3 is insufficient, the assist start control is executed. Therefore, even in such a case, sufficient driving force can be obtained using the driving force of the engine 2. Therefore, according to the start control device 1, it is possible to avoid a shortage of traction force at the start while reducing fuel consumption.

  In the start control device 1, when the first value is smaller than the second value and the accelerator operation amount is larger than the predetermined value (NO in step S5), the assist start control is executed. As a result, when a large traction force is required, the assist start control is executed, so that it is possible to reliably avoid a shortage of the traction force at the start.

  In the start control device 1, when the first value is smaller than the second value and the acceleration is larger than the predetermined value (NO in step S6), the assist start control is executed. As a result, when the acceleration of the vehicle V is larger than a predetermined value and it is difficult to detect the slope of the road surface or the weight of the vehicle V, the assist start control is executed, so that it is more reliably avoided that the traction force is insufficient at the start. can do. As such a case, for example, a case where the vehicle starts again from a state where the vehicle is not completely stopped after deceleration is conceivable.

  Further, in the start control device 1, when the first value is smaller than the second value and the direction indicator or the hazard lamp is lit (NO in step S4), the assist start control is executed. Thereby, since the assist start control is executed when the direction indicator or the hazard lamp is lit, it is possible to avoid a lack of traction force when starting in such a situation. Such control is particularly effective for avoiding insufficient traction when the vehicle V turns right.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the HVECU 30, the engine ECU 11, the AMTECU 12, and the battery ECU 13 are illustrated as the ECUs included in the vehicle V, but the number and types of ECUs included in the vehicle V are not limited. For example, the vehicle V may further include another ECU, or may include an ECU in which these ECUs are functionally integrated.

  Further, the processing may be performed as shown in FIG. In this modification, after starting the process, the HVECU 30 determines whether or not the first value when the weight is the first fixed value is smaller than the second value (step S9). As a result of the determination, if it is determined that the first value when the weight is set to the first fixed value is smaller than the second value (YES in step S9), the process proceeds to step S10, and the weight is set to the first fixed value. If it is determined that the first value is greater than or equal to the second value (NO in step S9), the process proceeds to step S8. The first fixed value is, for example, the worst value of the weight of the entire vehicle V, that is, the maximum value within an assumed range. In this case, the running resistance work becomes the maximum value. The first fixed value may be an arbitrary value, for example, a value obtained by adding or multiplying a predetermined value to the worst value of the weight of the entire vehicle V.

  Subsequently, the HVECU 30 determines whether or not the first value when the slope is the second fixed value is smaller than the second value (step S10). As a result of the determination, when it is determined that the first value when the gradient is set to the second fixed value is smaller than the second value (YES in step S10), the process proceeds to step S4, and the gradient is set to the second fixed value. If it is determined that the first value is greater than or equal to the second value (NO in step S10), the process proceeds to step S8. The second fixed value is, for example, the worst value of the gradient, that is, the maximum value within the assumed range (maximum ascending slope). In this case, the gradient resistance work becomes the maximum value. The second fixed value may be an arbitrary value, for example, a value obtained by adding or multiplying the worst value of the gradient by a predetermined value.

  Also by such a modification, it can avoid that tractive force is insufficient at the time of start, reducing fuel consumption similarly to the said embodiment. In the above-described embodiment, the start control device 1 may include only one of the weight detection unit 21 and the gradient detection unit 22. That is, the start control device 1 may include not only both the weight detection unit 21 and the gradient detection unit 22 but only a detection unit for detecting one of the weight and gradient of the entire vehicle V. In this case, the HVECU 30 executes the motor start control when the first value when the other of the weight and the gradient is a fixed value is smaller than the second value, and when the other of the weight and the gradient is the fixed value. When the first value is greater than or equal to the second value, the assist start control may be executed. This fixed value is, for example, the worst value of the other of the weight and the gradient. Also by such a modification, it can avoid that tractive force is insufficient at the time of start, reducing fuel consumption similarly to the said embodiment.

DESCRIPTION OF SYMBOLS 1 ... Start control apparatus, 2 ... Engine, 3 ... Motor generator, 21 ... Weight detection part, 22 ... Gradient detection part, 23 ... Output possible work detection part, 24 ... Acceleration detection part, 25 ... Accelerator operation amount detection part, V …vehicle.

Claims (6)

A start control device for controlling start of a vehicle including an engine and a motor,
A weight detector for detecting the weight of the entire vehicle;
A gradient detector for detecting the gradient of the road surface on which the vehicle is located;
An output possible work detection unit for detecting an output possible work of the motor;
A control unit that selects a control to be executed when the vehicle starts based on at least the detection result of the weight detection unit, the detection result of the gradient detection unit, and the detection result of the outputable work detection unit;
When the vehicle starts, the control unit
When the first value based on the sum of the running resistance work based on the weight and the gradient resistance work based on the gradient is smaller than the second value based on the output available work, the first value using only the driving force of the motor is used. Execute start control,
A start control device that executes a second start control using a driving force of the engine and the motor when the first value is equal to or greater than the second value. An accelerator operation amount detection unit for detecting an accelerator operation amount;
2. The start control device according to claim 1, wherein, when the first value is smaller than the second value, the control unit executes the second start control when the accelerator operation amount is larger than a predetermined value. . An acceleration detector for detecting the acceleration of the vehicle;
3. The start control device according to claim 1, wherein when the first value is smaller than the second value and the acceleration is greater than a predetermined value, the control unit executes the second start control. 4. . The control unit executes the first start control when the first value when one of the weight and the gradient is a first fixed value is smaller than the second value,
The said 2nd start control is performed when the said 1st value when one of the said weight and the said gradient is made into the said 1st fixed value is more than the said 2nd value. The start control device described in 1. The control unit includes both the first value when one of the weight and the gradient is the first fixed value, and the first value when the other of the weight and the gradient is the second fixed value. Is smaller than the second value, the first start control is executed,
The first value when one of the weight and the gradient is the first fixed value, and at least one of the first value when the other of the weight and the gradient is the second fixed value, The start control device according to claim 4, wherein when the value is equal to or greater than a second value, the second start control is executed. A start control device for controlling start of a vehicle including an engine and a motor,
A detection unit for detecting one of the weight of the entire vehicle and the gradient of the road surface;
An output possible work detection unit for detecting an output possible work of the motor;
A control unit that selects control to be executed when the vehicle starts based on at least the detection result of the detection unit and the detection result of the outputable work detection unit;
The controller is
When the value based on the sum of the running resistance work based on the weight and the gradient resistance work based on the gradient is the first value,
At the start of the vehicle,
When the first value when the other of the weight and the gradient is a fixed value is smaller than the second value based on the output work, the first start control using only the driving force of the motor is executed. ,
Start control that executes second start control using the driving force of the engine and the motor when the first value when the other of the weight and the gradient is the fixed value is greater than or equal to the second value apparatus.

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