JPH07102781B2 - Hybrid drive vehicle - Google Patents

Description

The present invention relates to a hybrid drive vehicle driven by an engine and an electric motor.

[Prior art]

Conventionally, a hybrid drive vehicle driven by an engine and an electric motor has been proposed, for example, in Japanese Utility Model Publication No. 55-138129. This will be described with reference to FIG. 4. The driving force of the engine 1 is transmitted to the mission 3 via the clutch 2 and further to the left and right front wheels 5R and 5L via the differential gear 4. On the other hand, the left and right rear wheels 6
The driving forces of the electric motors 8 and 8 are transmitted to the R and 6L via the one-way clutches 7 and 7, respectively, and the electric motors 8 and 8 are driven by the generator 9 connected to the engine. The controller 10 operates the electric motors 8 and 8 by operating the electric motors 8 and 8 in response to signals from the accelerator switch 11, the load current detector 12, the vehicle speed switch, etc. when the accelerator pedal is depressed and the vehicle speed is below a set value. It is controlled to drive.

Further, an electric vehicle in which an electric motor is driven by a battery is also known.

[Problems to be solved by the invention]

However, in the above conventional hybrid drive vehicle, when the accelerator pedal is depressed and the vehicle speed is equal to or lower than the set value, the electric motors 8 and 8 are operated to control the front wheels and the rear wheels. Because it is always driven by the internal combustion engine, not only in the city or suburbs,
Particularly in urban areas, there is a problem of air pollution or noise generation due to exhaust gas.

In addition, an electric vehicle in which an electric motor is driven by a battery has a problem that it is inferior in power performance to a vehicle driven by an engine, and the traveling distance in one charge is inferior due to the capacity of the battery.

The present invention is intended to solve the above problems, and an object thereof is to prevent generation of air pollution or noise by making it possible to switch between engine driving and electric motor driving.
The purpose is to enable charging of the battery when the battery is low.

[Means for solving problems]

Therefore, the present invention is a hybrid drive vehicle driven by an engine and an electric motor of a battery power source,
The presence / absence of a fault and the remaining amount of the battery are determined by comparing the signals of the fault detection unit for detecting a fault peculiar to an urban area, the battery remaining amount detection unit, and the fault detection unit and the battery remaining amount detection unit with a set value. Judgment means,
Drive switching means for switching to electric motor drive when the determining means determines that the remaining battery amount is large and there is a failure, and switching to engine driving when the determining means determines that the remaining battery capacity is small or there is no failure. It is characterized by including.

[Operation and effect of the invention]

In the present invention, for example, as shown in FIG. 3, the noise level is read from the noise detection sensor 28 (step,
) Next, the remaining battery amount is read from the remaining battery amount detection sensor (). Next, the remaining battery level is the set value α
If the battery level is larger than the set value α, proceed to step noise level determination. If the battery level is not larger than the set value α, drive the engine. A signal is output to the drive switching means so as to switch (). In the step, it is judged whether the noise level is larger than the set value β, and the set value β
If it is not larger, the process proceeds to step and a signal is output to the drive switching means to switch to the engine drive, and if it is larger than the set value β, a signal is output to the drive switching means to switch to the motor drive (). .

Therefore, when an obstacle peculiar to an urban area is detected, the engine drive is switched to the electric motor drive, so that the generation of air pollution or noise can be prevented. If there is little, the battery can be charged by preferentially switching to the engine drive.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of a hybrid drive vehicle of the present invention, FIG. 2 is a block diagram showing an embodiment of a control system of the hybrid drive vehicle of the present invention, and FIG. 3 is a view of FIG. It is a figure for demonstrating the flow of a process in an electronic control circuit. In the figure, 20 is a vehicle, 21 is an engine, 22 is a transmission, 23R and 23L are front wheels, 24R and 24L are rear wheels, 25 is an electric motor, 26 is a battery, 28 is a failure detection sensor, 29 is a battery remaining amount detection sensor, 30 is an electronic control circuit, 31 is a CPU, 32
Indicates drive switching means.

In FIG. 1, an engine 21 is mounted in the front part of a vehicle 20, and the driving force of the engine 21 is transmitted to the left and right front wheels 23R and 23L via a transmission 22, while the left and right rear wheels 24
A battery installed at the rear of the vehicle 20 configured to transmit the driving force of the electric motors 25 and 25 to the R and 24L, respectively.
The electric motors 25, 25 are driven by 26.

FIG. 2 shows an embodiment of the control system of the present invention, in which signals from a fault detection sensor 28 such as a noise detection sensor and a radio wave noise detection sensor and a battery remaining amount detection sensor 29 are sent to an electronic control circuit 30.
It is input to the CPU 31 therein, and a signal is output to the drive switching means 32 based on the judgment of the CPU 31, and a drive signal for either the engine 21 or the electric motor 25 is output.

Next, the flow of processing in the electronic control circuit 30 will be described with reference to FIG. 3. After setting the initial value, the noise level is read from the noise detection sensor 28 (step), and then the battery remaining amount is detected from the battery remaining amount detection sensor. Read (). Next, it is judged whether or not the battery remaining amount is larger than the set value α (). If the battery remaining amount is larger than the set value α, the process proceeds to the judgment of the noise level in the step, and the battery remaining amount is larger than the set value α. If it is not larger, a signal is output to the drive switching means so as to switch to the engine drive (). In the step, it is judged whether or not the noise level is larger than the set value β, and if it is not larger than the set value β, a signal is output to the drive switching means so as to switch to the engine drive in the step, and the set value β is set. If it is larger than the above, a signal is output to the drive switching means so as to switch to driving the electric motor ().

The present invention is not limited to the above embodiment, and various modifications can be made.

For example, in the above embodiment, the noise detection sensor detects the obstacle peculiar to the city area, but the obstacle specific to the city area may be detected by detecting the radio noise.

Further, in the above-described embodiment, when the obstacle peculiar to the city is detected, the drive mode is switched to the electric motor drive, but the ratio of the electric motor output to the engine output may be increased.

Further, in the above embodiment, the front wheel side is driven by the engine and the rear wheel side is driven by the two electric motors, but the rear wheel side may be driven by the engine and the front wheel side may be driven by the electric motor. The front wheels or the rear wheels may be driven by one electric motor.

As described above, according to the present invention, the engine drive and the electric motor drive are switched by judging the obstacle peculiar to the city, so that the generation of air pollution or noise can be prevented, and the remaining battery level is low. When it is low, the battery can be charged by preferentially switching to the engine drive.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a hybrid drive vehicle of the present invention, FIG. 2 is a block diagram showing an embodiment of a control system of the hybrid drive vehicle of the present invention, and FIG. 3 is a view of FIG. FIG. 4 is a diagram for explaining the flow of processing in the electronic control circuit, and FIG. 4 is a schematic configuration diagram showing a conventional hybrid drive vehicle. 20 …… vehicle, 21 …… engine, 22 …… transmission, 23R, 23L …… front wheel, 24R, 24L …… rear wheel, 25 …… electric motor, 26 …… battery, 28 …… fault detection sensor, 29 ……
Battery level sensor, 30 ... Electronic control circuit, 31 ...
… CPU, 32… Drive switching means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyohide Kato 10 Takane, Fujii-cho, Anjo City, Aichi Prefecture Aisin Warner Co., Ltd. (56) Bibliographic references Sho 55-127624 (JP, U)

Claims (3)

[Claims] 1. In a hybrid drive vehicle driven by an engine and a battery-powered electric motor, obstacle detection means for detecting an obstacle peculiar to an urban area, battery residual quantity detection means, and signals of these obstacle detection means and battery residual quantity detection means. Is compared with the set value to determine the presence / absence of a fault and the remaining amount of the battery, and when the determination unit determines that the remaining battery amount is large and there is a fault, it switches to the motor drive, and the determination unit A hybrid drive vehicle comprising drive switching means for switching to engine drive when it is determined that the battery level is low or there is no obstacle. 2. The hybrid drive vehicle according to claim 1, wherein the obstacle detection sensor detects noise. 3. The hybrid drive vehicle according to claim 1, wherein the obstacle detection sensor detects radio wave noise.