JPH10196772A - Automobile and automatic transmission control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make use of a common automatic transmission and a common automatic transmission control unit between a 24V battery mounted vehicle and a 12V battery mounted vehicle. SOLUTION: A 12V intermediate terminal 17 is provided for a 24V battery 11 so as to be connected with a 12V power supply line 19. A solenoid 21 of an automatic transmission 15 is connected with a 24V power supply line 19 so as to allow downstream control to be executed, meanwhile, a solenoid 22 is connected with an 0V so as to allow upstream control to be executed. An automatic transmission control unit 14 keeps the connection or disconnection of the downstream side of the solenoid 21, and of the upstream side of the solenoid 22 with the 12V power supply line 19 under control. Since the solenoids 21 and 22 are distributed between the 24V through 12V and the 12V through 0V of the battery 11, the whole of the battery is discharged on average.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile equipped with a 24V battery.

[0002]

2. Description of the Related Art A 12V battery is mounted on a passenger car or a small truck, but a 24V battery is mounted on a large vehicle such as a bus or a heavy truck or a vehicle with a diesel engine. This is because a high power cell motor is required to start a high horsepower engine or a diesel engine of a large vehicle, and a 12V battery is insufficient for driving the high power cell motor.

In a conventional vehicle equipped with a 24V battery, not only the cell motor but also all control devices and loads are operated at 24V. For example, the solenoid of an automatic transmission has 24 solenoids.
The power supply circuit for V and incorporated in the automatic transmission control device forms 5 V for the circuit from the input 24 V.
In addition, lamps, air conditioners, heaters, relays, wipers, power windows, etc. are also uniformly driven at 24V.

[0004]

The compatibility between the control device and the load between the conventional vehicle equipped with a 24V battery and the vehicle equipped with a 12V battery is poor. Therefore, even when the parts and units of the 12V battery-equipped vehicle cannot be used in the 24V battery-equipped vehicle and the production volume is small, it is necessary to secure the inventory of the parts and units of the 24V specification. For example, if a passenger car of the same model has a gasoline engine specification and a diesel engine specification, if the vehicle with a diesel engine specification is a vehicle equipped with a 24V battery, the mechanical parts of the automatic transmission and the control contents thereof are completely the same. About automatic transmission solenoids and automatic transmission control devices 12
It is necessary to produce two types, one for V and the other for 24V.

[0005] The present invention relates to a vehicle equipped with a 24 V battery.
It is an object of the present invention to provide an automobile in which parts and units of a vehicle equipped with a V battery can be used so that it is not necessary to prepare a dedicated product for a vehicle equipped with a 24 V battery.

[0006]

According to a first aspect of the present invention, there is provided an automobile in which a high-voltage battery is mounted and a high-voltage terminal is connected to a first power supply line. And a plurality of control devices and loads operating at a power supply voltage of 作 動 of the high voltage are connected between the 0 V-second power supply line of the battery and the first power supply line. -The power is connected to the second power supply line.

According to a second aspect of the present invention, the plurality of control devices and loads in the configuration of the first aspect are divided into two sets having an average power consumption substantially equal to each other, and are divided between the 0V-second power supply line and the second power supply line. It is distributed between the first power supply line and the second power supply line.

A third aspect of the present invention is an automatic transmission control device usable in both a vehicle equipped with a 24V battery and a vehicle equipped with a 12V battery, wherein a first power supply for turning on / off a power supply to a solenoid connected to a power supply potential is provided. A first switch element is provided according to an output of an arithmetic circuit that controls the automatic transmission.
A second switch element for turning on / off the switch element, a photocoupler is provided between the second switch element and the first switch element, and the ground side of the first switch element is set to 1
It can be connected to both 2V and 0V.

[0009]

According to the first aspect of the present invention, since the second power supply line is drawn from the half-potential intermediate terminal of the high-voltage battery, one-half of the high voltage is applied between the 0V-second power supply line of the battery. By taking out the voltage, it is possible to drive a load or a control device having a specification of 1/2 of the high voltage. Similarly, the first
The voltage of 1/2 of the high voltage taken from the power supply line to the second power supply line is also used by another load or control device.

According to the second aspect of the present invention, the power level taken out from between 0V and the second power supply line and the first power supply line
The power level taken out from between the second power supply lines is made uniform, and the cell between the 0V-intermediate terminal of the battery and the intermediate terminal-
The residual capacity of the cell between the high voltage terminals is consumed almost equally, so that the cell on one side of the battery is not over-discharged.

According to the third aspect of the present invention, there is provided an automatic transmission control device.
A V-spec solenoid is controlled downstream. Arithmetic circuit and second
The switch element sets the ground level on the circuit to zero of the battery.
It is connected to V and operates at 12V between the 12V terminal and 0V terminal of the battery. When used in a vehicle equipped with a 24V battery, the arithmetic circuit and the second switch element are supplied with power from a 12V intermediate terminal provided in the 24V battery.
The solenoid is supplied with power from the 24V terminal.
Since the ground side of the switch element is connected to the intermediate terminal of 12V, the voltage applied to the solenoid is 12V. The ON / OFF of the solenoid is set at 12 on the downstream side of the solenoid.
It is controlled depending on whether or not it is connected to the intermediate terminal of V. When used in a vehicle with a 12V battery, the solenoid receives power supply from the 12V terminal, and the ground side of the first switch element is connected to the 0V terminal. The second switch element turns ON / O the first switch element via a photocoupler.
FF. Therefore, similarly to the case where the voltage range in which the first switch element operates is 12V between the 24V terminal and the 12V terminal, the second switch element also connects the first switch element when the voltage range is 12V between the 12V terminal and the 0V terminal. Can control.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An automatic transmission control device according to an embodiment will be described with reference to FIGS. As shown in FIG.
The 24V battery 11 having two 2V cells takes out the 12V intermediate terminal 17 from between the sixth and seventh cells. The 24 V terminal and the intermediate terminal 17 of the battery 11 are connected to power lines 18 and 19 via the key switch 12, respectively. The starter motor 13 is connected to a power supply line 18 via a starter switch 16 and forms a large rotational torque at a high voltage of 24 V,
The on-board engine (10) is reliably started.

As shown in FIG. 2, the automatic transmission 15 is controlled by the automatic transmission control unit 14 to change the output of the engine 10. The automatic transmission control unit 14 calculates the instantaneous throttle opening from the output of the throttle sensor of the engine 10 and calculates the instantaneous vehicle speed from the output of the vehicle speed sensor of the automatic transmission 15.
Then, the optimum gear position is determined from the combination of the throttle opening and the vehicle speed, and the solenoids 21 and 2 of the automatic transmission 15 are determined.
2 is switched as shown in FIG.

The automatic transmission control unit 14 includes:
The battery 11 is connected to a 0V terminal (connected to the vehicle body) and a 12V power supply line 19 (second power supply line) to receive power supply. On the other hand, the automatic transmission 15
It is connected to the V terminal and a 24V power supply line 18 (first power supply line) to receive power supply. However, the automatic transmission 15
The solenoids 21 and 22 for shifting are all 12V specifications, and the solenoid 21 operates between 24V and 12V, and the solenoid 22 operates between 12V and 0V. That is, one end of the solenoid 21 is connected to the 24 V power supply line 18, and one end of the solenoid 22 is connected to the 0 V ground level. Automatic transmission control unit 14
Depends on whether the other ends of the solenoids 21 and 22 are connected to 12V or not.
Set N / OFF.

As shown in FIG. 3, a CPU (arithmetic element) 27 of the automatic transmission control unit 14 executes necessary arithmetic operations and program processing according to a mounted program, and outputs the data to the automatic transmission 15 via an output circuit 28. Control. To the input circuit 25, outputs and operation information of various sensors including the above-described throttle sensor and vehicle speed sensor are input. The input circuit 25 converts these input signals into CP
The signal is converted into a digital signal conforming to the input specification of U27.
The memory 26 holds data and programs necessary for the processing of the CPU 27. The power supply circuit 24 forms a constant voltage of 5 V for a circuit for operating the CPU 27, the input circuit 25, the output circuit 28 and the like from the voltage of 12 V extracted between the intermediate terminal 17 and the 0 V terminal of the battery 11. The 0 V terminal of 5 V for the circuit is connected to the 0 V terminal of the battery 11.

The output circuit 28 forms a control output suitable for each load from an output signal output from the CPU 27. One output signal output from the CPU 27 controls the transistor Q2 to set ON / OFF of the solenoid 21 of the automatic transmission 15. Another output signal controls transistor Q4 to set ON / OFF of solenoid 22.

As described above, the solenoid 21 operates at 24 V
Therefore, the transistor Q1 provided on the downstream side of the solenoid 21 controls connection / disconnection of the solenoid 21 with respect to 12V connected through the changeover switch 29. A photocoupler 23 connects between a transistor (second transistor) Q2 having a collector voltage in a range of 5V-0V and a transistor (first transistor) Q1 having a collector voltage in a range of 24V-12V. When the transistor Q2 turns on, the photocoupler 23 turns on and the transistor Q
1 is turned on, and the solenoid 21 is turned on.

On the other hand, the solenoid 22 driven at 12V between 12V and 0V is set ON / OFF by directly controlling the base current of the transistor Q3 provided upstream of the solenoid 22 by the transistor Q4. When the transistor Q4 is turned on, the transistor Q3 is turned on and a voltage of 12 V is applied to the solenoid 22, so that the solenoid 22 is turned on.

As shown in FIG. 4, the automatic transmission control unit 14 turns on the solenoid 21 when setting the first and fourth speeds, and turns off the solenoid 21 at the second and third speeds. Solenoid 22 is O at 1st and 2nd speed
N is turned off at the third and fourth speeds. That is, the cells between 12V and OV of the battery 11 bear the power consumption of the automatic transmission control unit 14 and the power consumption of the solenoid 22 in the first and second speeds. On the other hand, the cells between 24V and 12V of the battery 11 bear the power consumption of the solenoid 22 in the first and fourth speeds. Automatic transmission 15
All other solenoids (not shown) are unified to use 12V, and are distributed between 12V-OV and between 24V-12V. As a result, the current drawn from the cell between 12V-OV and the current drawn from the cell between 24V-12V are on average at substantially the same level.

When the automatic transmission 15 and the automatic transmission control unit 14 of the embodiment are used in a vehicle equipped with a 12V battery, 12V is connected to the solenoid 21 and the switch 29 is switched from the terminal K to the terminal L. The emitter of transistor Q1 is connected to 0V. As a result, the transistor Q1 becomes 12V-0
V, but the base current of the transistor Q1 is controlled via the photocoupler 23.
The ON / OFF of the solenoid 21 can be set in exactly the same manner as in the case of 24 V by turning ON / OFF the transistor Q2. The transistors Q4 and Q3 and the solenoid 22 can be used as they are without switching or changing wiring.

According to the automatic transmission control unit 14 of the embodiment, the automatic transmission 15 and the automatic transmission
4 can be shared by a vehicle equipped with a 12V battery and a vehicle equipped with a 24V battery, so there is no need to produce both a 12V battery specification and a 24V battery specification. Automatic transmission 1
5 without replacing the automatic transmission control unit 14 with the existing 12V battery
It is also possible to replace with V specification.

The load on the automatic transmission 15 and the automatic transmission control unit 14 is distributed between 12V-OV and 24V-12V,
Current taken from cell between V-OV and 24V-12
Since the average current levels taken out of the cells between V are equalized, the discharge is performed without bias in the whole battery as compared with the case where all the power is borne between the intermediate terminal 17 and the 0 V terminal of the battery 11. Is done. Therefore, there is no fear that the discharge proceeds unilaterally in the cell between the 12V-OV of the battery 11 and adversely affects the reproducibility and life of the charge and discharge of the battery 11.

Incidentally, the relationship between the battery 11 and the automatic transmission 15 in the embodiment may be extended to other vehicle-mounted loads. As shown in FIG. 5, the 12V power supply lines 19 and 24
A V power supply line 18 is provided in advance on the vehicle body. When the 24 V battery 11 is mounted for the convenience of mounting the large output cell motor 13, the intermediate terminal 17 is provided on the 24 V battery 11 and connected to the 12 V power line 19.
Then, the two loads 31 and 32 whose average extraction currents are almost equal are distributed between 24V and 12V and between 12V and 0V. As a result, the loads 31, 32 can be set to the 12V specification without imposing a load on the battery 11. As the loads 31, 32, various lamps, air conditioners, various heaters, relays, wipers, power windows, and the like can be used.

[0024]

According to the first aspect of the present invention, various loads having a voltage specification of の of the high voltage can be applied without providing a DC-DC converter for converting the high voltage to a voltage of 電位 of the high voltage. Available on cars with high voltage battery. If the first power line and the second power line are prepared in the car in advance,
With a slight connection change on the load side, a load having a voltage specification of １ ／ of the high voltage can be commonly used for both the high voltage battery and the high voltage １ ／ voltage battery. Compared to a case where a battery is provided with an intermediate terminal having a half potential of a high voltage and power is supplied from the intermediate terminal to all loads other than the starter motor, the entire battery is discharged without bias and the performance and life of the battery are improved. Without adversely affecting the system.

According to the second aspect of the present invention, the loads are distributed so that the average power consumption becomes substantially equal.
The entire battery discharges more evenly without adversely affecting the performance or life of the battery.

According to the third aspect of the present invention, the second transistor can similarly control the first transistor via the photocoupler regardless of whether the voltage connected to the first solenoid is 12 V or 24 V. A common automatic transmission can be used for both a 24V battery-equipped vehicle and a 12V battery-equipped vehicle. Specifically, the solenoid may be kept at 12V even in a vehicle equipped with a 24V battery.
It is not necessary to change to the 4V specification.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a power supply system of an automobile.

FIG. 2 is an explanatory diagram of a connection between an automatic transmission control unit and an automatic transmission.

FIG. 3 is an explanatory diagram of a circuit configuration of an automatic transmission control unit.

FIG. 4 is an explanatory diagram of an operation of a solenoid.

FIG. 5 is an explanatory diagram of connection of a load of 12V specification to a 24V battery.

[Explanation of symbols]

 Reference Signs List 10 engine 11 battery 12 key switch 13 cell motor 14 automatic transmission control unit 15 automatic transmission 16 switch 17 intermediate terminal 18, 19 power supply line 21, 22 solenoid 23 photo coupler 24 power supply circuit 25 input circuit 26 memory 27 CPU 28 output circuit 29 Selector switch 31, 32 Load Q1, Q2, Q3, Q4 Transistor

Claims (3)

[Claims] 1. An automobile equipped with a high-voltage battery and having a high-voltage terminal connected to a first power supply line, wherein the battery is provided with an intermediate terminal having a half potential of the high voltage, and a second power supply line is provided. A plurality of control devices and loads, which are connected and operate at a power supply voltage of 高 of the high voltage, are connected between the 0 V-second power supply line and the first power supply line-the second power supply line of the battery. An automobile characterized by the following. 2. The plurality of control devices and loads are divided into two sets in which the average power consumption is substantially equal, and are divided between the 0V-second power supply line and the first power supply line-second power supply line. The vehicle according to claim 1, wherein the vehicle is sorted. 3. An automatic transmission control device usable in both a vehicle equipped with a 24V battery and a vehicle equipped with a 12V battery, wherein power supply to a solenoid connected to a power supply potential is turned on.
The first switch element is turned on / off in response to an output of a first switch element that turns on / off and an arithmetic circuit that controls the automatic transmission.
A second switch element that performs FF, a photocoupler is provided between the second switch element and the first switch element, and the ground side of the first switch element can be connected to both 12 V and 0 V. Automatic transmission control device characterized.