JPH09282969A - Controller for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any unexpected malfunction by making a switch operation of a predetermined on-vehicle electrical device ineffective when it is detected that an ignition switch operated by an ignition key is in a given locked state. SOLUTION: When an ignition key inserted into an ignition key inserting hole 1 is turned, a contact of a power switch housed inside is switched. When the key is positioned in an OFF position 2, an accessory position 4, an ON position 5 and a starting position 6, starting or stopping of an engine and power supply to devices can be controlled in the same manner as the prior art. Furthermore, the key is positioned in a child lock position 3 when a driver leaves an automobile for a short period in an operative state of the engine. In the child lock position 3, a switch operation or the like is recognized and controlled by a microcomputer, to thus become ineffective, and further, the power is supplied from a battery. The key can be drawn in the child lock position 3, and the automobile is stationary by operation of a side brake. Moreover, an air conditioner is operated, thereby adjusting an inside temperature to a predetermined value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for electric components of an automobile, and more particularly to a device for ensuring safety against accidental switch operation by a child or the like.

[0002]

2. Description of the Related Art Conventionally, an automobile is provided with an ignition switch for controlling the starting and stopping of the engine and the supply of electric power to various devices depending on the parking condition or the running condition. The state of the ignition switch is switched depending on the key position (rotation operation position) of the ignition key. For example, when the vehicle is parked, if the ignition key is set to the OFF position, the power supply to the engine and each electrical component will be cut off, and the ignition key can be removed from the ignition switch (key cylinder). It is structured.
Further, if the ignition key is set to the accessory (ACC) position, the power supply to the engine and the like is cut off, but it is possible to operate by connecting the power supply to each electric component such as an air conditioner (air conditioner) or a radio. It is in a state.
In this case, the ignition key cannot be removed from the key cylinder. Further, in order to operate and operate the engine, when the ignition key is further turned from the ON key position to the engine start position, the power source is connected to the engine starter and the engine can be started. Then, after the engine is started, if the rotational force to the key is loosened (the key is released), the ignition key returns to the ON position and the engine continues to rotate and the automobile can be operated.

[0003]

However, when a child is riding in the vehicle, the child may touch the switches and the like and each device may operate unexpectedly. In addition, the driver may leave the vehicle for a short time while stopping the vehicle with the engine running, but a child left in the vehicle may accidentally touch the switches in the vehicle to cause an unexpected operation. An object of the present invention is to prevent such an unexpected malfunction.

[0004]

In order to solve such a problem, the present invention provides a detection means for detecting that the operation state of an ignition switch of an automobile operated by an ignition key is in a predetermined lock state. And a nullifying unit for nullifying a switch operation of a predetermined on-vehicle electrical device when the lock state is detected by the detecting unit.

Further, in the locked state, the ignition key can be removed from the ignition switch. In the locked state,
It is characterized in that a brake control means for operating a brake of an automobile is provided. Further, in the locked state, a temperature control means for controlling an air conditioner for adjusting the temperature inside the vehicle is provided.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of an ignition key switch (key cylinder) of the present invention. Reference numeral 1 is a hole for inserting the ignition key, and the ignition key is inserted, and the ignition key is rotated to a required position to switch the contacts of a power switch provided inside. OFF
Position 2 is the position of the ignition key when the car is parked for a long time or is parked in the parking lot.
Then, the power supply to the electric circuit of the engine and each electric component is cut off. Child lock (CH.L) position 3
Is the position of the ignition key when leaving the vehicle for a short time while the engine is operating. Even if a switch or the like is operated, that operation is invalidated. The child lock position has a structure in which the ignition key can be removed (the same structure as the conventional ignition key OFF position).

Further, at the child lock position, the side brake is electrically operated to fix the automobile so that the automobile does not move, and the air conditioner operates to adjust the room temperature in the vehicle to a preset vehicle temperature. . The accessory (ACC) position 4 is a position at which a traveling system such as an engine is stopped but electric components such as a radio stereo are operable, and the power source is connected only to a predetermined electric component. The ON position 5 is a position in which the vehicle is running, and the power source is connected to the electric circuits of the engine and the devices and various electrical components required for running. The start (STA) position 6 is a position when the engine is started, and a power source is connected to the electric circuit of the engine and the starter motor. Then, turn the ignition key to the ON position 5
When it is turned clockwise to the start position 6, the starter motor rotates to start the engine, and if the force turned clockwise is released, it returns to the ON position 5 and stops, and the running state (engine operating state) of the vehicle I can keep it. The ignition key is held at each position, but the start position 6
Only automatically returns to 0N position 5. Further, at the accessory position 4, the ON position 5, and the start position 6, the key cannot be removed.

Next, the power distribution of the ignition key switch at each key position will be described. It should be noted that the same positions as those in FIG. Reference numeral 10 denotes a battery mounted on an automobile for supplying a power source for a starter motor, a power source for ignition, and other power sources. Reference numeral 11 denotes an ignition key switch for supplying power to each circuit by inserting an ignition key into the key hole 1 of the key cylinder and rotating the same. The power source of the battery 10 is connected to the circuit corresponding to the position of the ignition key. It is like this.

That is, at the STA position, the power supply line A is O
The power supply line B at the N position, the power supply line C at the ACC position, the CH. At the L position, the power supply line D is connected to the battery 10 and power is supplied to the corresponding electric equipment (circuit). The power supply lines A, B, C, D are also input to a microcomputer, and the position of the ignition switch is known to the microcomputer.

FIG. 3 is a block diagram showing an embodiment of the present invention. The same components as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted. A switch circuit 12 is composed of a switch or the like, and connects each electric circuit and the power source (battery) 10 in accordance with a control signal. 1
A starter motor 3 for starting the engine rotates when power is supplied to start the engine. Reference numeral 14 is an automobile engine, and its electric circuit (ignition circuit or the like) is connected to the battery 10 via a switch circuit 12. The necessary parts such as the engine control computer are the battery 10
It is connected to and is always supplied with power.

Reference numeral 15 denotes a hand (side) brake device of an automobile, which is composed of a hydraulic actuator or the like, and operates so as to be applied with a normal hand brake operation and a control signal from the outside. Reference numeral 16 denotes an air conditioner (air conditioner) for controlling the temperature inside the vehicle interior, which is composed of a thermocouple or the like, in response to a signal from a temperature sensor 17 for detecting the temperature inside the vehicle interior,
It operates so that the vehicle interior will reach the set temperature.

Reference numeral 18 denotes audio equipment of a radio / tape player, and electric components such as a power window for controlling opening / closing of windows. And these starter motor 13 and engine 1
4, the brake device 15, the air conditioner 16, and the electrical components 18 are connected to the battery 10 via the switch circuit 12. The air conditioner 16 and the electrical equipment 18 are provided with operation switches 19 for operating these devices.

Reference numeral 20 denotes a microcomputer for performing various controls, which is directly connected to the battery 10 and is constantly supplied with power to perform a necessary operation, and the braking device 1
5, the control signal is output to the air conditioner 16 and the electrical component 18. The output of the ignition switch 11 is connected to the microcomputer 20, the state of the ignition switch 11 is grasped, and the switch circuit 1 is selected according to the state.
Controlling 2. Reference numeral 21 denotes an operation switch for performing various operations, which is connected to the microcomputer 20.

Next, the processing performed by the microcomputer 20 will be described. FIG. 4 is a flowchart showing the processing performed by the microcomputer 20. The process shown in FIG. 4 is performed from the time when the microcomputer 20 is connected to the battery 10. Step S
In step 1, it is determined whether the ignition switch 11 is in the STA position. If the ignition switch 11 is in the STA position, the process proceeds to step S2. If not, the process proceeds to step S4. In step S2, a control signal is output to the switch circuit 12 so that power is supplied to the starter motor 13 and the engine 14, and the process proceeds to step S3.

In step S3, processing for validating the operation of the operation switch 21 and the operation switch of each electric component (air conditioner 16, electric component 18, etc.) (internal processing and output of a control signal to each electric component) is performed. Return to step S1. At step S4, the position of the ignition switch 11 is turned on.
It is determined whether the position is the position, and in step S5, the engine 1
4, the brake device 15, the switch circuit 12 so that power is supplied to each electrical component (air conditioner 16, electrical component 18, etc.)
The control signal is output to and the process proceeds to step S3.

In step S6, it is determined whether or not the ignition switch 11 is in the ACC position. If the ignition switch 11 is in the ACC position, the process proceeds to step S7. If it is not in the ACC position, the process proceeds to step S8. In step S7, a control signal is output to the switch circuit 12 so that power is supplied to each electrical component (air conditioner 16, electrical component 18, etc.), and the process proceeds to step S3.

In step S8, the position of the ignition switch 11 is CH. It is judged whether or not it is at the L position and CH. L
If the position, move to step S9, CH. If it is not at the L position, the process proceeds to step S13. In step S9, a control signal is output to the switch circuit 12 so that power is supplied to the brake device 15 and each electrical component (air conditioner 16, electrical component 18, etc.), and the process proceeds to step S10. In step S10, the operation switch 21 and each electrical component (air conditioner 16, electrical component 1
8) and the like (internal processing and control signal output to each electrical component) for invalidating a specific operation of the operation switch (especially dangerous operation if erroneous operation is performed), and the process proceeds to step S11. In step S11, a signal for operating the parking brake is output to the braking device 15, and the process proceeds to step S12. It should be noted that this braking process is performed when the vehicle is stopped and is not performed while the vehicle is running.
In addition, the side brake that has been activated by the process of step S11 has the ignition switch 11 at the position C.
H. It is released when it is not in the L position (normal operation by manual operation is not released).

In step S13, a control signal is output to the air conditioner 16 in order to adjust the vehicle interior temperature to fall within a predetermined temperature range, and the process returns to step S1. The setting of the vehicle interior temperature and the like are stored in the memory in advance. Step S13
Then, a control signal is output to the switch circuit 12 so as to cut off the power supply to each device, and the process returns to step S1. According to the present embodiment, the ignition switch CH. When the switch is set to the L position, the operation of a specific operation switch is prohibited, so that an unexpected operation of an electrical component, an engine, or the like can be prevented. Further, since the parking brake operates, it is possible to prevent the vehicle from unexpectedly moving while the vehicle is stopped. Then, since the air conditioner also operates and the temperature inside the vehicle interior is maintained at an appropriate level, it is possible to comfortably ride in the vehicle interior.

In this embodiment, the ignition switch is CH. Since the parking brake is operated only when the vehicle is stopped (speed 0) at the L position, the ignition switch is set to CH. By setting to the L position, it is possible to prevent malfunction of the operation switch by a child or the like.

[0020]

As described above in detail, according to the present invention, when the switch is in the predetermined position, the predetermined operation switch is invalidated, so that an accidental operation of an electric device mounted on a vehicle due to an erroneous operation of a child or the like is unexpected. Can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of an ignition key switch.

[Fig.2] Wiring diagram of ignition key switch

FIG. 3 is a block diagram of an embodiment of the present invention.

FIG. 4 is a flowchart showing processing performed by the microcomputer 20.

[Explanation of symbols]

 1 ... Ignition key insertion hole 2 ... 0FF position 3 ... CH. L position (child lock) 4 ... ACC position 5 ... ON position 6 ... STA position

Claims (4)

[Claims] 1. A detection means for detecting that an operation state of an ignition switch of an automobile operated by an ignition key is in a predetermined lock state, and a predetermined vehicle-mounted state when the lock state is detected by the detection means. A control device for an automobile, comprising: invalidating means for invalidating a switch operation of an electric device. 2. The vehicle control device according to claim 1, wherein, in the locked state, the ignition key can be pulled out from the ignition switch. 3. The vehicle control device according to claim 1, further comprising brake control means for operating a brake of the vehicle in the locked state. 4. The vehicle control device according to claim 1, further comprising temperature control means for controlling an air conditioner for adjusting the temperature inside the vehicle in the locked state.