JPH0988656A - Driving output stop device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop a prime mover at the time of a vehicle being in a stop state and an occupant leaving the vehicle. SOLUTION: In the case of specified time having elapsed after a vehicle is stopped and no occupant is considered to be in the vehicle, driving of an engine 4 is stopped. Accordingly, when an occupant leaves the vehicle with key left on, even if the charge rate of a battery 1 becomes lower than the specified value, the engine 4 is not driven, nor is charge by a generator 5 performed. As a result, even when the vehicle is parked with the key left on, the continuous driving of the engine 4 and the continuous exhaust of exhaust gas are eliminated so as to prevent the useless fuel consumption and unnecessary exhaust of exhaust gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive output stop device for stopping a prime mover when an occupant leaves the vehicle in a vehicle in which a drive output is generated by a prime mover. It is suitable to apply.

[0002]

2. Description of the Related Art A hybrid electric vehicle having an electric motor as a driving source is driven by an electric motor having a battery (battery) as a power source, and the battery is charged by a generator operated by a prime mover. Ensures the output of the electric motor. Generally, a hybrid electric vehicle may be driven by driving an electric motor using only a battery, or may be driven while a generator is operated by a prime mover to charge the battery. Normally, the electric motor is driven only by the battery to run, and when the charging rate of the battery becomes equal to or lower than a preset value, the generator is operated to charge the battery. As a result, the hybrid electric vehicle maintains a predetermined power performance.

[0003]

In the conventional hybrid electric vehicle, when the electric motor is driven by only the battery to drive the vehicle, the prime mover is not driven, so that the vehicle can be driven in a very quiet state. There is. For this reason, since the vehicle is quiet when the vehicle is stopped, the driver may forget to stop the electric motor (with the key turned on) and leave the vehicle. If the electric motor is left as it is without being stopped, the charging rate of the battery becomes less than the set value, the prime mover is driven, and the generator starts to operate.
Therefore, continuation of power generation even when the vehicle is stopped has to be avoided not only from waste of energy but also from the viewpoint of exhaust gas.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a drive output stop device capable of stopping a prime mover when a vehicle is in a stopped state and an occupant leaves the vehicle. To do.

[0005]

In order to achieve the above object, the structure of a vehicle drive output stopping device of the present invention is an electric motor which is operated by power supply from a power supply device having a power storage function to drive the vehicle. Driving power generation means having a generator for supplying electric power to the power source and charging the power supply device and a prime mover for driving the generator, vehicle state detection means for detecting the state of the vehicle, and vehicle state detection means And a control device for stopping the drive of the prime mover when the stopped state of the vehicle is detected by the vehicle state detection means. When detected by, the drive of the prime mover is stopped.

Further, the control means is provided with a function of canceling the drive stop of the prime mover when the vehicle state detecting means detects the moving state of the vehicle after the drive of the prime mover is stopped. Is characterized by. Further, the vehicle state detection means is provided with an occupant detection means for detecting the presence or absence of an occupant, and a vehicle speed sensor for detecting the vehicle speed of the vehicle, and the control device allows the occupant to get on the vehicle. It is characterized in that it is provided with a function of stopping the drive of the prime mover after a lapse of a predetermined time after it is detected that the engine is not operating. Further, the occupant detection means is a door switch that detects opening / closing of a door of the vehicle.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic configuration of a hybrid electric vehicle equipped with a drive output stopping device according to an embodiment of the present invention, FIG. 2 is a block configuration of a control device, and FIG. Is shown.

As shown in FIG. 1, a hybrid electric vehicle is equipped with a battery 1 as a power supply device, and the battery 1 is electrically connected to a motor 3 as an electric motor through a motor controller 2. The motor 3 is connected to the drive wheels of a vehicle (not shown), and the hybrid electric vehicle runs by driving the motor 3. On the other hand, a hybrid electric vehicle is equipped with an engine 4 as a prime mover, and an output side of the engine 4 is a battery 1 and a motor 3.
A generator 5 is connected to supply electricity to. The battery 1 is charged by operating the generator 5 by driving the engine 4. The operations of the engine 4 and the generator 5 are controlled based on a command from the control device 6.

On the other hand, the accelerator pedal 7 is provided with an accelerator opening sensor 8 as an operation detecting means, and an output according to a depression amount of the accelerator pedal 7 by a driver is inputted to the motor controller 2 and the control device 6. The motor controller 2 sets an instruction output to the motor 3 by the output signal of the accelerator opening sensor 8, and the motor 3 is driven according to the instruction output to the motor 3. The battery 1 is provided with a remaining capacity meter 10 as a storage amount detecting means,
The remaining capacity of the battery 1 is detected by the remaining capacity meter 10. The detection information of the remaining capacity meter 10 is input to the control device 6. Further, the vehicle is provided with a vehicle speed sensor 31 that detects a vehicle speed as vehicle state detection means, and vehicle speed information from the vehicle speed sensor 31 is input to the control device 6. Further, the vehicle is provided with a door switch 32 as an occupant detecting means for detecting opening / closing of the door as vehicle state detecting means, and the opening / closing information of the door by the door switch 32 (ON state when the door is opened) is supplied to the control device 6. Entered in.

As the vehicle state detecting means for determining whether or not the vehicle is in a traveling state, it is possible to use a sensor for detecting the depression of the accelerator pedal 7 or the brake pedal, and the occupant detection. As a means, it is possible to use a sensor that directly detects the presence or absence of an occupant.

As shown in FIG. 2, the control device 6 is provided with a calculating means 11, a judging means 12 and an instructing means 13. The output signal of the accelerator opening sensor 8 is input to the calculation means 11, and the detection information of the remaining capacity meter 10 and the calculation result information of the calculation means 11 are input to the determination means 12.
Further, the control device 6 is provided with a storage means 14, and the storage means 14 stores various preset values.
The storage information of the storage means 14 is input to the determination means 12,
The calculation result information and the stored information are compared and determined, and the instruction means 13 is executed.
The determination result information is input to. The instruction means 13 outputs an operation command to the engine 4 and the generator 5 based on the input determination result information.

That is, the determination means 12 includes a remaining capacity meter 10
The charging rate A of the battery 1 is input according to the detection information.
The storage unit 14 stores in advance a lower limit value (predetermined value) a of the remaining electric capacity of the battery 1, and the determination unit 12 compares the predetermined value a stored in the storage unit 14 with the charging rate A to determine the battery 1 It is judged whether or not the remaining capacity of is sufficient.
Further, the instruction output P, which is the acceleration or speed required for the vehicle, is obtained by the motor controller 2 based on the information of the output signal of the accelerator opening sensor 8 and input to the calculation means 11. Further, the detection information of the vehicle speed sensor 31 and the door switch 32 is input to the determination unit 12, and the elapsed time T after the door switch 32 is changed from the ON state to the OFF state (after the door is closed) is input to the calculation unit 11. Equipped with a counting function to count. Further, the storage means 14 stores in advance a predetermined elapsed time b (time to determine that the occupant is not in the vehicle) for stopping the driving of the engine 4 after the door is closed, and the determination means 12 passes the elapsed time. T is compared with the predetermined elapsed time b.

The operation of the prime mover stop processing by the drive output stop device described above will be described with reference to FIG.

It is determined whether or not the charging rate A of the battery 1 exceeds a predetermined value a, and when the charging rate A of the battery 1 is less than or equal to the predetermined value a, the engine 4 and the generator 5 are operated based on various conditions. A command is output, power generation is started by controlling the exciting current, and the battery 1 is charged (power generation starts). The prime mover stop processing is executed according to the flowchart described below when the key is in the on state.

As shown in FIG. 3, it is determined in step S1 whether the door switch 32 has changed from the on state to the off state, and if it is determined that the door switch 32 has changed from the on state to the off state, that is, the door is When it is determined that the closed function is closed, the elapsed time T of the counting function is reset in step S2, and then counting of the elapsed time T is started in step S3. If it is determined in step S1 that the door switch 32 has not changed from the on state to the off state, the step S
The determination process of 1 is repeated. After the counting of the elapsed time T is started in step S3, the vehicle speed sensor 3 is started in step S4.
It is determined whether or not the absolute value of the vehicle speed V detected in 1 exceeds 0, that is, whether or not the vehicle is stopped. If the absolute value of the vehicle speed V exceeds 0, the vehicle is moving. If it is determined, even if the door switch 32 changes from the on state to the off state, it is considered that the occupant is in the vehicle and the process returns to step S1.

On the other hand, in step S4, the absolute value of the vehicle speed V is 0.
If it is determined that the vehicle is stopped, it is considered that the occupant may not be in the vehicle, and the elapsed time T exceeds the predetermined elapsed time b (for example, 10 minutes) in step S5. It is determined whether or not it exceeds. Elapsed time T
If it is determined that the time exceeds the predetermined elapsed time b, it is estimated that the vehicle is stopped and the occupant is not in the vehicle.
At 6, the engine 4 is commanded to stop. If it is determined in step S5 that the elapsed time T does not exceed the predetermined elapsed time b, it is possible that the occupant is in the vehicle.
Return to 3.

That is, when the predetermined elapsed time b has passed since the vehicle was stopped and it was considered that the passenger was not in the vehicle,
The engine 4 is stopped when it is determined that the passenger has left the vehicle with the key turned on. As a result, even if the charging rate A of the battery 1 falls below the predetermined value a, the engine 4 is not driven and charging by the generator 5 is not performed. Therefore, even if the vehicle is parked with the key turned on, the exhaust gas will not be continuously discharged, and the exhaust gas will not be filled when the parking place is inside the garage. In the above embodiment, the predetermined elapsed time b is set to, for example, 10 minutes, but this is set to a time when the charging rate A of the battery 1 is recovered to some extent and exhaust gas is not filled. . Therefore, the predetermined elapsed time b is changed according to various situations.

After instructing to stop the engine 4 in step S6, it is determined in step S7 whether or not the absolute value of the vehicle speed V exceeds 0, that is, whether or not the vehicle has started to move.
When it is determined that the absolute value of the vehicle speed V exceeds 0 and the vehicle has started to move, the stop command for the engine 4 is canceled in step S8 (claim 2). In other words, even when it is determined that the vehicle has stopped and the occupant left the vehicle with the key on, the vehicle was stopped for a long time with the key on while the occupant was on for some reason. In such cases, when the vehicle starts running, the engine 4 can be driven without performing a special starting operation. Step S
If the movement of the vehicle is not determined in 7, the process proceeds to step S6 and the stop of the engine 4 is continued.

Therefore, according to the above-described drive output stop device, the drive of the engine 4 is stopped when the predetermined elapsed time b has elapsed since the vehicle was stopped and it was considered that the occupant was not in the vehicle. , When the occupant leaves the vehicle with the key on, the charging rate A of the battery 1 is a predetermined value a.
Even if the temperature falls below the range, the engine 4 is not driven and the generator 5 does not charge the battery. Therefore, even if the vehicle is parked with the key turned on, the engine 4 does not continue to be driven and exhaust gas is not continuously discharged, and it is possible to prevent wasteful consumption of fuel and unnecessary discharge of exhaust gas. .

A vehicle speed sensor is used as the vehicle state detecting means, and the door switch 32 is used as the occupant detecting means.
Since I used, I can apply an existing switch,
The number of parts does not increase and control does not become complicated. Further, when the vehicle moves after the engine 4 is commanded to stop, the engine 4 stop command is canceled, so that the frequency of the engine 4 start operation can be reduced.

In the above embodiment, the drive output stopping device is applied to a hybrid electric vehicle. However, if the vehicle is equipped with a drive force generating means for generating a drive output of the vehicle by a prime mover, it is a hybrid vehicle. It is not limited to electric vehicles.

[0022]

According to the vehicle drive output stopping apparatus of the present invention, when the vehicle state detecting means detects the stopped state of the vehicle, the drive of the prime mover for charging the power supply device is stopped, so that the vehicle stops. After that, the prime mover will not continue to be driven. Further, since the driving of the prime mover is stopped when the vehicle is stopped and the passenger leaves the vehicle, the prime mover does not continue to be driven after the vehicle stops and the passenger leaves. Therefore, it is possible to prevent wasteful consumption of fuel and unnecessary discharge of exhaust gas. Especially,
When applied to a hybrid electric vehicle where the driving source while stopped is quiet, even if the driver forgets to turn off the key after stopping and the occupant leaves the vehicle, the prime mover that charges the power supply unit will not continue to be driven and exhaust gas will be emitted. It is possible to prevent fuel consumption and unnecessary fuel consumption.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hybrid electric vehicle including a drive output stopping device according to an embodiment of the present invention.

FIG. 2 is a block configuration diagram of a control device.

FIG. 3 is a flowchart of a motor stop process.

[Explanation of symbols]

 1 Battery 2 Motor Controller 3 Motor 4 Engine 5 Generator 6 Controller 7 Accelerator Pedal 8 Accelerator Opening Sensor 10 Remaining Capacity Meter 11 Calculation Means 12 Judgment Means 13 Instructing Means 14 Storage Means 31 Vehicle Speed Sensor 32 Door Switch

Claims (4)

[Claims] 1. A motor driven by power supply from a power supply device having a power storage function to drive a vehicle, an electric motor for supplying the electric motor to the motor, and a generator for charging the power supply device, and a prime mover driving the generator. A driving force generation means having a vehicle state detection means for detecting the state of the vehicle; and a control device for stopping the drive of the prime mover when the vehicle state detection means detects a stopped state of the vehicle. A drive output stopping device for a vehicle characterized by the above. 2. The control means has a function of canceling the drive stop of the prime mover when the vehicle state detecting means detects the moving state of the vehicle after the drive of the prime mover is stopped. The drive output stopping device for a vehicle according to claim 1, wherein: 3. The vehicle state detecting means includes an occupant detecting means for detecting the presence or absence of an occupant and a vehicle speed sensor for detecting a vehicle speed of the vehicle, and the control device includes an occupant detecting means for detecting an occupant. The drive output stopping device for a vehicle according to claim 2, further comprising a function of stopping driving of the prime mover after a predetermined time has elapsed after it is detected that the vehicle is not in the vehicle. 4. The drive output stop device for a vehicle according to claim 3, wherein the occupant detection means is a door switch that detects opening and closing of a door of the vehicle.