JPH06171424A - Stop lamp circuit - Google Patents

Abstract

PURPOSE:To put on a stop lamp only at the time of deceleration of a vehicle by furnishing a relay circuit to connect a stop lamp and an electric source to each other on a circuit to connect an exhaust brake switch. CONSTITUTION:When an exhaust brake works while travelling, an exhaust brake switch 5 comes to be in the closed state, an acceleration pedal 12 is stepped on, an acceleration switch 9 and a clutch switch 10 do not come to be in the opened state as long as a clutch is not opened, and as a parking switch 7 is also in the closed state, an electric current from a power source 2 excites an excitating coil of a relay circuit 8, makes a contact point in the closed state and puts on a stop lamp 3. At the time when a vehicle parks, the parking brake switch 7 comes to be in the opened state and the contact point of the relay circuit 8 comes to be in the opened state. Even if an engine is started and the exhaust brake switch 5 comes to be in the closed state in such a state, the electric current from the power source 2 is not supplied to the stop lamp 3 and putting on is avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for blinking a stop lamp of an automobile. The present invention relates to a stop lamp circuit that lights up in synchronization with the operation of an exhaust brake.

[0002]

2. Description of the Related Art A conventional stop lamp circuit is constructed so as to be lit in conjunction with a brake operation by a brake pedal, and is not lit by the operation of an exhaust brake. In recent years, however, the regulations for vehicle equipment have been revised, and it has become possible to turn on the stop lamp in conjunction with the operation of the exhaust brake.

[0003]

However, if a circuit is constructed so that the stop lamp is lit simply by interlocking with the switch for controlling the exhaust brake, during warm-up operation performed immediately after the engine is started, Since exhaust gas is often controlled by operating the exhaust brake in order to accelerate warm-up, the stop lamp will be lit during warm-up operation.

The present invention avoids such an inconvenience, and an object of the present invention is to provide a circuit that does not turn on the stop lamp during warm-up operation and turns on the stop lamp only when the vehicle decelerates.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a stop lamp circuit having an opening / closing circuit for connecting a power source and a stop lamp when a brake pedal is stepped on, in conjunction with a switch for activating an exhaust brake. The exhaust circuit is closed by an exhaust brake switch and the parking brake switch is opened when the parking brake is applied, and the make circuit includes a relay circuit that connects the stop lamp and the power supply. Characterize.

In the exhaust brake switch,
It is desirable that an accelerator switch that is released when the accelerator pedal is depressed and a clutch switch that is released when the clutch is released are connected in series.

[0007]

[Function] When the brake pedal is depressed, the stop lamp switch is closed and the open / close circuit is closed to light the stop lamp. When the vehicle is running, the parking brake is released, so the parking brake switch is closed.If the exhaust brake is applied at this time, the exhaust brake switch is closed and the relay circuit is closed to stop. Turn on the lamp. When the vehicle is stopped and the parking brake is applied, the parking brake switch is opened and the relay circuit is opened. Therefore, even if the exhaust brake is activated during warm-up operation, the stop lamp is not lit.

As described above, according to the present invention, the lighting of the stop lamp can be avoided during the warm-up operation, and the lighting of the stop lamp can be performed only when the vehicle is decelerated, and the trouble of the careless lighting of the stop lamp is eliminated. , The life of the stop lamp can be extended.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.

The embodiment of the present invention is provided with an opening / closing circuit 4 for connecting the power supply 2 and the stop lamp 3 when the brake pedal 1 is depressed, and further, it is closed in conjunction with a switch for activating the exhaust brake. The exhaust brake switch 5 and the parking brake switch 7 that are released when the parking brake 6 is applied are energized, and their make circuit includes a relay circuit 8 that connects the stop lamp 3 and the power supply 2. The exhaust brake switch 5 includes an accelerator switch 9 that is released when the accelerator pedal 12 is depressed and a clutch switch 10 that is released when the clutch is released.
Are connected in series. The exciting coil in the opening / closing circuit 4 is connected to the power supply 2 and the stop lamp switch 11 which is closed in association with the brake.

Although the relay circuit of the above-described embodiment uses a wire-wound relay, this can be similarly realized by using a transistor or other semiconductor relay.

Next, the operation of the embodiment of the present invention thus constructed will be described.

In the brake operation during normal traveling, when the brake pedal 1 is stepped on, the stop lamp switch 11 that opens and closes in conjunction with the brake pedal 1 is closed, and the exciting coil in the open / close circuit 4 is excited. Close the contact. When the opening / closing circuit 4 is closed, the current from the power supply 2 is supplied to the stop lamp 3 and it is turned on. At this time, since the contacts of the relay circuit 8 are open, there is no influence of this current flowing backward.

Further, when the exhaust brake operates during traveling, the exhaust brake switch 5 is interlocked and the accelerator pedal 12 is depressed and the accelerator switch 9 and the clutch switch 10 are opened unless the clutch is released. However, since the parking brake switch 7 is also closed because the vehicle is traveling, the current from the power source 2 excites the exciting coil of the relay circuit 8 to close the contact and turn on the stop lamp 3.

Since the parking brake 6 is operated when the vehicle is stopped, the parking brake switch 7 is opened in conjunction with this operation. Therefore, no current is supplied to the exciting coil of the relay circuit 8 and its contact is opened, so that no current is supplied from the power source 2 to the stop lamp 3. When the engine is started in such a state and the exhaust brake is activated to stop warming up, the exhaust brake switch 5 is closed, but the contact of the relay circuit 8 is open, so The current from 2 is not supplied to the stop lamp 3 to avoid lighting.

When warming up is completed and the vehicle is traveling,
Since the parking brake 6 is released, the parking brake switch 7 is closed, the current from the power source 2 excites the exciting coil of the relay circuit 8, and the contacts are closed. If the exhaust brake is applied in this state,
The current from the power supply 2 is supplied to the stop lamp 3 via the relay circuit 8 to light it.

When the clutch is released for shifting, the clutch switch 10 is opened, or when the accelerator pedal 12 is depressed for acceleration, the accelerator switch 9 is opened, and the exhaust brake switch 5 is turned on. Even in the closed state, the exhaust brake does not substantially operate at this time, so the power source 2
Current is not supplied to the exciting coil of the relay circuit 8,
The contact opens and the stop lamp 3 stops lighting.

[0018]

As described above, according to the present invention, it is possible to avoid the stop lamp from being lit during warm-up operation and to illuminate the stop lamp only when the vehicle is decelerating. There is an effect that the troublesomeness is eliminated, the deterioration of the stop lamp is prevented, and the life is extended.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

[Explanation of symbols]

 1 Brake pedal 2 Power supply 3 Stop lamp 4 Open / close circuit 5 Exhaust brake switch 6 Parking brake 7 Parking brake switch 8 Relay circuit 9 Accelerator switch 10 Clutch switch 11 Stop lamp switch 12 Accelerator pedal

Claims (2)

[Claims] 1. A stop lamp circuit having an opening / closing circuit for connecting a power supply and a stop lamp when a brake pedal is depressed, the exhaust brake switch being closed in conjunction with a switch for operating the exhaust brake. And a stop lamp circuit which is energized via a parking brake switch that is opened when the parking brake is applied, and whose make circuit includes a relay circuit that connects the stop lamp and a power supply. 2. The exhaust brake switch is connected in series with an accelerator switch which is released when an accelerator pedal is depressed and a clutch switch which is released when a clutch is released. Stop lamp circuit.