JP2000308210A - Hybrid vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely raise an alarm, if there is a possibility of engine start, while the hood cover of the engine room of a hybrid vehicle is opened for inspection, etc. SOLUTION: When a hybrid control system is started by turning on an ignition switch and the hood cover of an engine room is opened by turning on a hood cover switch (S101 and S102), engine room alarm flags 1 and 2 are set according to the remaining capacity of a battery (S105-S108), and voice signal is outputted to a loudspeaker according to the values of the respective flags, and alarm by voice is generated by the loudspeaker. With this constitution, if there is a possibility of engine start or the engine being started, while the hood cover of the engine room is opened for inspection, etc., an alarm is surely raised to inform the operator and the user of the engine start.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid vehicle which issues an alarm when there is a possibility of starting the engine when a hood cover of an engine room is opened due to inspection or the like.

[0002]

2. Description of the Related Art In recent years, for vehicles such as automobiles, hybrid vehicles using both an engine and a motor have been developed from the viewpoint of low pollution and resource saving.
2. Description of the Related Art There is known a hybrid vehicle in which an engine and a motor serving as a generator or a generator and a traveling motor are provided, and the vehicle travels using at least one of the engine and the motor as a traveling drive source of the vehicle.

[0003] This hybrid vehicle is supplied with electric power when the motor is used as a drive source for driving, and is charged when the generator / motor is operated as a generator or when the generator / motor is driven by an engine or the generator is driven. It has a battery.

[0004] In this type of hybrid vehicle, when the hybrid control system is powered on and activated by turning on an ignition switch by a key switch, the remaining capacity (charge amount) of the battery has a margin. When there is, both the engine and the generator / motor or the generator are stopped, and when the remaining capacity of the battery is insufficient, the field current is supplied to the generator / motor and the engine is used to activate the generator / motor. The battery is charged by driving the generator / motor to act as a generator, or by driving the generator by an engine (Japanese Patent Laid-Open No. 8-289407).
Reference).

Therefore, even if the engine or motor is stopped with the hood cover of the engine room opened for inspection or the like, the hybrid control system is powered on and started by turning on the ignition switch by the key switch. At times, the engine may start.

[0006] Therefore, in order to call attention, conventionally, when the hood cover of the engine room is opened, a seal or the like indicating the caution is written on the back surface of the hood cover or the side wall in the engine room which is easily visible. The problem was dealt with by attaching it to the service manual and stating that as a precaution in the service manual.

[0007]

Conventionally, however, a sticker or the like is attached to the back of a hood cover or a side wall in an engine room, or is clearly stated as one of precautions in a service manual. It is merely calling attention and there is a possibility that the operator or the user may overlook.

The present invention has been made in consideration of the above circumstances, and has been described in connection with the case where a hood cover of an engine room is opened by inspection or the like.
It is an object of the present invention to provide a hybrid vehicle that can reliably issue an alarm when there is a possibility of starting the engine.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, an engine and a motor serving as a generator or a generator and a traveling motor are arranged in an engine room. When at least one of the engine and the motor is used as a driving source for the vehicle, power is supplied when the motor is used as a driving source, and when the generator / motor is operated as a generator, or when power is generated by the engine. In a hybrid vehicle equipped with a battery that is charged by driving a combined motor or a generator,
When the hybrid control system is activated and the hood cover of the engine room is open, an alarm control means for generating an alarm is provided.

[0010] According to a second aspect of the present invention, in the first aspect of the present invention, the alarm control means is arranged so that the hybrid control system is activated and the hood cover of the engine room is open. When the remaining capacity of the battery has a margin, a light first alarm is generated, and when the remaining capacity of the battery is low,
It is characterized in that a severe second alarm is generated.

That is, according to the first aspect of the present invention, an alarm is issued when the hybrid control system is activated and the hood cover of the engine room is open. Therefore, when there is a possibility that the engine may be started in a situation where the hood cover of the engine room is opened due to inspection or the like, it is possible to surely issue an alarm and surely notify the worker or the user of this. Become.

Further, according to the second aspect of the present invention, when the hybrid control system is activated and the hood cover of the engine room is open, if the remaining capacity of the battery has a margin, the second The alarm of 1 is issued and when the remaining capacity of the battery is low,
By generating a severe second alarm, the content of the alarm is changed according to the possibility of starting the engine.

[0013]

An embodiment of the present invention will be described below with reference to the drawings.

First, a configuration including a control system of the hybrid vehicle 1 will be described with reference to FIGS.

The hybrid vehicle 1 according to the present embodiment is a parallel hybrid vehicle that uses an engine 2 and two motors A and B in combination, and is directly connected to the engine 2 and an output shaft 2a of the engine 2 to start the engine 2. And generator / motor that supports power generation and power assist (first motor)
3, a planetary gear unit 4 connected to the output shaft 1a of the engine 1 via the motor 3, and controls the functions of the planetary gear unit 4 to serve as a driving force source for starting and reversing and to collect deceleration energy. Motor (2nd
And a belt-type continuously variable transmission (CVT) 6 as a power conversion mechanism that performs a power conversion function during traveling by performing speed change and torque amplification.

The engine 1, the motors 3, 5, the planetary gear unit 4, and the CVT 6 are disposed in the engine room 1a of the hybrid vehicle 1, and are to be inspected and maintained by opening the hood cover 1b of the engine room 1a. Is possible.

The planetary gear unit 4 is a single pinion type planetary gear having a sun gear 4a, a carrier 4b rotatably supporting a pinion meshing with the sun gear 4a, and a ring gear 4c meshing with the pinion. The sun gear 4a and the carrier 4b And a lock-up clutch 7 for engaging / releasing the lock.

That is, in the drive system of the hybrid vehicle 1 according to the present embodiment, the planetary gear unit 4 having the lock-up clutch 7 interposed between the sun gear 4a and the carrier 4b includes the output shaft 2a of the engine 2 and the input shaft 6a of the CVT 6.
The sun gear 4a of the planetary gear unit 4 is connected via a motor 3 directly connected to the output shaft 2a of the engine 2, and the carrier 4b is
It is coupled to the input shaft 6a of T6. And CVT6
A differential mechanism 9 is connected to the output shaft 6b via a reduction gear train 8, and a drive wheel (front wheel in this embodiment) 11 is connected to the differential mechanism 9 via a drive shaft 10.

In this case, as described above, the engine 2 and the motor 3 are connected to the sun gear 4a of the planetary gear unit 4 and the motor 5 is connected to the ring gear 4c to obtain an output from the carrier 4b.
The output from the motor is shifted and torque amplified by the CVT 6 and transmitted to the drive wheels 11, so that the two motors 3, 5 can be used for both power generation and power supply, and have a relatively small output. A motor can be used.

The sun gear 4a of the planetary gear unit 4 is operated by the lock-up clutch 7 according to running conditions.
And the carrier 4b, it is possible to form a drive shaft directly connected to the engine from the engine 2 to the CVT 6 in which the two motors 3 and 5 are disposed therebetween, so that C
The driving force can be transmitted to the VT 6 or the braking force from the drive shaft 11 can be used.

The torque transmission of the engine 2 and the motors 3 and 5 via the planetary gear unit 4 when the lock-up clutch 7 is engaged and disengaged and the flow of electricity due to power generation are described in Japanese Patent Application No. Flat 10-4080
Issue.

Next, a description will be given of a control system (hybrid control system) that controls the above-described drive system and controls the running of the hybrid vehicle 1. Reference numeral 15 is composed of a microcomputer and a functional circuit controlled by the microcomputer, and includes an engine 2, two motors 3,
5. A control unit for centrally controlling the CVT 6.

The control unit 15 detects a driver's driving condition by detecting an operation of depressing an accelerator pedal or a brake pedal, a steering angle of the steering, and the like, and an operating condition of auxiliary equipment such as lights and an air conditioner. In addition, various sensors and switches (not shown) are connected to detect the current vehicle running state such as vehicle speed, uphill or downhill, and road surface conditions. The control unit 15 further monitors the operating state of the engine 2, the two motors 3 and 5, the CVT 6 and the state of the battery 16, and controls the engine 2 and the inverter 17 based on various information detected and monitored. , 18 to control the driving of the motors 3 and 5, charge the battery 16, and control the speed ratio of the CVT 6 and the supply hydraulic pressure.

The driving modes of the hybrid vehicle 1 controlled by the above-described hybrid control system can be broadly classified into the following three basic modes when viewed from the transmission input shaft. The state transition of the mode is repeated.

(1) Series (series & parallel) traveling mode When the required driving force is small, the lock-up clutch 7 is released, and the engine 2 and the motor 3 support the reaction force of the motor 5 while traveling mainly with the motor 5. I do. At this time, a part of the driving force of the engine 2 is input to the sun gear 4a of the planetary gear unit 4, is combined with the driving force of the motor 5 of the ring gear 4c, and is output from the carrier 4b.

(2) Parallel running mode When the required driving force is large, the lock-up clutch 7 is engaged to connect the sun gear 4a of the planetary gear unit 4 and the carrier 4b, and the driving force of the engine 2 is transmitted from the ring gear 4c to the motor 5 The driving force is added and output from the carrier 4b, and the engine 2 alone or the engine 2 and the motor 3,
The vehicle travels by using both torques of the vehicle 5 and the vehicle.

(3) Regeneration mode of braking force At the time of deceleration, the braking force is regenerated by the motor 5 in cooperation with the brake control. That is, the regenerative braking is performed by cooperatively sharing the regenerative torque by the motor 5 and the braking torque by the brake mechanism in accordance with the amount of depression of the brake pedal.

In addition to the above-described driving modes, there are other modes such as when the vehicle is stopped. When the ignition switch 19 is turned on by a key switch (not shown), the hybrid control system centering on the control unit 15 is powered on and started. When there is a margin in the remaining capacity (charge amount) of the battery 16 when the vehicle is stopped,
When both the engine 2 and each of the motors 3 and 5 are stopped, and the remaining capacity of the battery 16 is insufficient, a field current is supplied to the motor 3 serving as a generator and the motor 3 is driven by the engine 2. Thus, the motor 3 is operated as a generator to charge the battery 16.

For this reason, the engine room 1 is checked by inspection or the like.
With the hood cover 1b open, the engine 2 starts even when the engine 2 and the motors 3 and 5 are stopped and the hybrid control system is powered on and started by turning on the ignition switch 19. May be.

Therefore, in this embodiment, in order to surely call attention at this time, the hood cover switch 20 which is turned on when the hood cover 1b is opened, and the speaker 21 as an example of the alarm means are connected to the control unit 15, and In the unit 15, the hybrid control system is activated by turning on the ignition switch 19, and
When the hood cover of the engine room is open, a predetermined audio signal is output to the speaker to generate an audio alert from the speaker.

That is, in the present embodiment, the function of the alarm control means according to the present invention is realized by the control unit 15.

More specifically, when the power to the control unit 15 is turned on by turning on the key switch, the control unit 15 controls the control unit 15 for a predetermined time (for example, 1000 times).
The function of the alarm control means is realized by the alarm condition setting routine shown in FIG. 3 and the alarm generation routine shown in FIG. 4 executed every msec).

Hereinafter, the alarm control processing by the control unit 15 will be described with reference to the flowcharts of FIGS.

First, the alarm condition setting routine of FIG. 3 will be described. In the alarm condition setting routine, first, in steps S101 and S102, the start of the hybrid control system by turning on the ignition switch 19 and the on / off state of the hood cover switch 20 are determined.

Then, the hybrid control system is stopped by turning off the ignition switch 19, or
Hood cover 1 by turning off hood cover switch 20
When b is closed, from the corresponding step to step S1
Proceeding to 03, in steps S103 and S104, an engine room warning flag 1 for issuing a first mild warning, a second severe warning
And clears the engine room warning flag 2 for issuing the warning, and exits the routine.

If the hybrid control system is activated by turning on the ignition switch 19 and the hood cover 1b is opened by turning on the hood cover switch 20, the steps S101 and S1 are performed.
Then, the process proceeds to step S105 via the control unit 02, and further, the remaining capacity SOC of the battery 16 is set to a predetermined value (for example, 50
%), It is determined whether or not the state of charge of the battery 16 is reduced and the state of charge is insufficient.

When the remaining capacity of the battery 10 is less than the predetermined value and the remaining capacity of the battery 16 is low,
Proceeding to step S106, an engine room warning flag 2 indicating a severe warning is set, and an engine room warning flag 1 indicating a minor warning is cleared in a succeeding step S107.
Exit the routine.

On the other hand, in step S105, the remaining capacity of the battery 16 exceeds the predetermined value,
If there is enough remaining capacity, the routine proceeds to step S108, where an engine room warning flag 1 indicating a minor warning is set, and after step S104, an engine room warning flag 2 indicating a severe warning is cleared. Through.

Each of the engine room warning flags 1 and 2 set according to the alarm conditions by the above alarm condition setting routine.
Are referred to in the alarm generation routine of FIG. 4, and an alarm is issued according to each of the engine room warning flags 1 and 2.

The alarm generation routine will be described. First, in step S201, the engine room warning flag 1 is set with reference to the engine room warning flag 1 indicating a slight warning, and the hybrid control system is started.
If the hood cover 1b of the engine room 1a is open and the remaining capacity of the battery 16 has a margin, the process proceeds to step S202, in which a first audio signal is output to the speaker 21 and the process exits.

Here, the first audio signal is an audio signal recorded or synthesized in advance, which is used to generate a first mild alarm, and is output by the first audio signal to the speaker 21. For example, a small audible warning is given, "Ignition switch is on. Engine may start to charge. Be careful."

If the engine room warning flag 1 has been cleared in step S201, the process proceeds to step S203, and the engine room warning flag 2 indicating a serious warning is referred to. If the engine room warning flag 1 is set, the hybrid control system is activated, and the hood cover 1b of the engine room 1a is open, and the remaining capacity of the battery 16 is low, Go to S204, Speaker 2
Then, the second audio signal is output to 1 and the routine exits.

The second audio signal is a previously recorded or synthesized audio signal, like the first audio signal, and is used to generate a second severe alarm in response to a first mild alarm. Things. Then, by the second audio signal output to the speaker 21, for example, "The engine is running (or the engine is running) for charging. Be careful. Turn off the ignition switch when checking. "And a severe warning by voice will be issued.

On the other hand, both engine room warning flags 1 and 2
Are both cleared, and the ignition switch 19
When the hybrid control system is stopped by turning off the hood cover, or when the hood cover 1b is closed by turning off the hood cover switch 20, the process proceeds to step S205 via steps S201 and S203 described above, and stops the output of the audio signal and issues an alarm. Exit the routine without emitting.

Accordingly, the engine room 1a is inspected or the like.
When the hood cover 1b is opened, there is a possibility that the engine will be started, and when the engine is likely to be activated, an alarm is issued without fail. can do.

Also, the hybrid control system is activated,
In addition, in a situation where the hood cover 1b of the engine room 1a is open, when the remaining capacity of the battery 16 has an allowance, a slight first alarm is issued so that even if the engine 2 is not running, It is possible to alert the worker to start of the engine 2. Further, when the state of charge of the battery 16 is low, the second alarm of a severe level can be generated, so that the content of the alarm can be changed in accordance with the activation of the engine 2, thereby enabling the user and the work to be performed more accurately. It is possible to call attention to the person.

In this embodiment, the engine and the engine 2
Although the description has been given of the hybrid vehicle including the two motors serving also as the generators, the present invention is not limited thereto, and may be applied to various hybrid vehicles such as a hybrid vehicle including an engine, a motor, and a generator. Further, in the present embodiment, a speaker is used as an alarming unit, and an alarm is issued by sound.
It goes without saying that appropriate means can be adopted.

[0048]

As described above, according to the first aspect of the present invention, when the hybrid control system is activated and the hood cover of the engine room is opened, an alarm is generated. When the hood cover of the engine room is opened due to factors such as the start of the engine, there is a possibility that an alarm will be issued and the operator or user can be notified of the alarm. Can be aroused.

According to the second aspect of the present invention, when the hybrid control system is activated and the hood cover of the engine room is open, when the remaining capacity of the battery has a margin, the second 1 is generated and when the remaining capacity of the battery is low,
Since the second severe alarm is generated, in addition to the effect of the first aspect of the present invention, when there is a possibility that the engine may be started in a situation where the hood cover of the engine room is opened due to inspection or the like, or When the engine is running, there is an effect that a warning can be issued stepwise surely and accurately in accordance with this.

That is, when the hybrid control system is activated and the hood cover of the engine room is open, if the remaining capacity of the battery has a margin, a slight first alarm is issued to stop the engine. Even so, it is possible to alert the user or the worker to start the engine.

When the state of charge of the battery is low, the second alarm is generated to provide the user and the worker with a more accurate and reliable alarm when the engine is started. Be alerted.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a configuration of a main part in a hybrid vehicle.

FIG. 2 is an explanatory diagram showing a configuration of a control system.

FIG. 3 is a flowchart of an alarm condition setting routine.

FIG. 4 is a flowchart of an alarm generation routine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hybrid vehicle 1a Engine room 1b Hood cover 2 Engine 3,5 Motor 15 Control unit (alarm control means) 16 Battery 19 Ignition switch 20 Hood cover switch 21 Speaker

Claims (2)

[Claims] An engine and a motor that also serves as a generator or a generator and a traveling motor are disposed in an engine room, and at least one of the engine and the motor is used as a traveling drive source of the vehicle. When the vehicle is used as a traveling drive source, power is supplied, and when the generator / motor is operated as a generator, or in a hybrid vehicle having a battery which is charged by driving the generator / motor or the generator by the engine. A hybrid vehicle comprising an alarm control means for generating an alarm when the hybrid control system is activated and the hood cover of the engine room is open. 2. The alarm control means according to claim 1, wherein when the hybrid control system is activated and the hood cover of the engine room is open, the remaining capacity of the battery has a margin. 3. An alarm according to claim 1, wherein when the remaining capacity of the battery is low, a second severe alarm is generated.
The hybrid car described.