JPH0820281A - Stop lamp lighting control device - Google Patents

Abstract

(57) [Summary] [Purpose] It is prohibited to turn on the stop lamp when the cold start switch is operated. [Configuration] A diode 30 that allows only a current flow from the exhaust brake switch 29 to the exhaust brake actuating magnet valve 31 side is used, and a stop lamp and a diode 30 are connected in parallel to the exhaust brake switch 29, and the exhaust brake The stop lamp is turned on when the switch 29 is operated, the stop lamp is turned off when the exhaust brake actuating magnet valve 31 is operated by operating only the cold start switch 33, and the stop lamp is stopped when the cold start switch 33 is operated. The lamp is not turned on, and the stop lamp is turned off when the cold start switch 33 is operated with an extremely simple structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stop lamp lighting control device for a vehicle equipped with an exhaust brake as an auxiliary brake.

[0002]

2. Description of the Related Art Large vehicles are equipped with auxiliary brakes such as an exhaust brake, a power retard, and a retarder in addition to a foot brake. In recent years, in terms of safety, it has been proposed to turn on a stop lamp in the same manner as when operating a foot brake in order to notify a following vehicle of deceleration even when the auxiliary brake is activated. For example, JP-A-4-
No. 169344 proposes a stop lamp device provided with a stop lamp that is turned on by a regular brake device and is turned on by the operation of an exhaust brake device. In this way, by lighting the stop lamp even when the exhaust brake is activated, it is possible to accurately notify the following vehicle of deceleration. On the other hand, some large vehicles have a cold start function that speeds up engine warm-up when the engine is started at a low temperature in the same state as when exhaust gas is throttled to operate an exhaust brake.

An example of an electric circuit of a stop lamp lighting control device, which is conceivable when the stop lamp is lighted even when the exhaust brake is operated in a vehicle having a cold start function, will be described with reference to FIG. In FIG. 5, 1 is a power retard switch, 2 is a retarder switch, 3 is an exhaust brake switch, and by operating the switches 1, 2 and 3, a magnet valve 4 for a power retard, a magnet valve 5 for a retarder, a magnet valve for an exhaust brake. 6 operates to drive each auxiliary brake individually. The switches 1, 2, 3 are connected in parallel to the lighting relay 10 via the diodes 7, 8, 9 respectively, and when one of the switches 1, 2, 3 is turned on, the lighting relay 10 operates and is not shown. The stop lamp is turned on. On the other hand, cold start switch 11
Is connected to the exhaust brake magnet valve 6, and the operation of the cold start switch 11 activates the exhaust brake magnet valve 6 so that the exhaust brake is activated.

[0004]

In the conventional stop lamp lighting control device, since the exhaust brake magnet valve 6 is operated by the operation of the cold start switch 11, the lighting relay 10 is also operated at the cold start.
Is activated and the stop lamp lights up. For this reason, the stop lamp will light up when not braking,
If the vehicle is started with the cold start switch 11 being operated, the vehicle will run with the stop lamp lit.

The present invention has been made in view of the above situation, and the stop lamp does not light up even if the exhaust brake magnet valve is operated except when the exhaust brake is driven for braking. An object is to provide a lighting control device.

[0006]

The structure of the present invention for achieving the above object includes a stop lamp which is turned on when braking is detected, an exhaust brake switch for operating an exhaust brake, and an engine starting time. A cold start switch for operating the exhaust brake, a driving means for driving the exhaust brake, an actuation of the driving means in conjunction with the operation of the exhaust brake switch and the cold start switch, and the operation of the exhaust brake switch. And a control means for prohibiting the stop lamp from being turned on when the exhaust brake is operated by operating only the cold start switch.

Further, the control means is such that the exhaust brake switch and the cold start switch are connected in parallel to the drive means, and the drive is performed from the exhaust brake switch between the drive means and the exhaust brake switch. A diode that allows only the flow of current to the means side is installed, and the stop lamp is configured by a circuit connected in parallel with the diode to the exhaust brake switch.

Further, the control means is such that the exhaust brake switch and the cold start switch are connected in parallel to the drive means, and the exhaust brake switch drives the exhaust brake switch between the drive means and the exhaust brake switch. A diode that allows only the flow of current to the means side is installed, the stop lamp is selectively connected to the front stage or the rear stage of the diode, and the stop lamp is connected to the front stage of the diode when the cold start switch is operated. It is characterized by comprising a circuit provided with a relay.

Further, the control means is such that the exhaust brake switch and the cold start switch are connected in parallel to the drive means, and the exhaust brake switch drives the exhaust brake switch between the drive means and the exhaust brake switch. A diode that allows only the flow of current to the means side is installed, and a first relay that connects the stop lamp and the latter stage of the diode at the time of closing, and is powered to open when the cold start switch is operated,
It is characterized in that it is configured by a circuit provided with a second relay which is supplied with power from the preceding stage of the diode and shuts off a power supply path to the first relay when the exhaust brake switch is operated.

[0010]

[Function] By operating the exhaust brake switch or the cold start switch, the driving means is actuated to drive the exhaust brake. When the exhaust brake is driven, the control means turns on the stop lamp when the exhaust brake switch is operated, while prohibiting the stop lamp from being turned on when the cold start switch is operated.

The control means is provided with a diode that allows only the flow of current from the exhaust brake switch to the drive means side, and the stop lamp is connected in parallel with the diode to the exhaust brake switch, so the cold start switch is operated. There is no current flow to the stop lamp when it is turned on. In addition, the control means is equipped with a diode that allows only the flow of current from the exhaust brake switch to the drive means side, and when operating the cold start switch, the stop lamp is connected to the front stage of the diode by the relay and the exhaust brake switch is operated. There is no current flow to the stop lamp unless it is done. Further, the control means is provided with a diode that allows only a current flow from the exhaust brake switch to the drive means side, and when the cold start switch is operated, the first relay is supplied with electric power to open and the current to the stop lamp side is opened. There is no flow, and when the exhaust brake switch is operated, the power supply path to the first relay is blocked by the second relay, the first relay is closed, and current flows to the stop lamp side.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an electric circuit of a stop lamp lighting control device according to a first embodiment of the present invention, and FIG. 2 shows a stop lamp lighting circuit.

First, a stop lamp lighting circuit will be described with reference to FIG. In FIG. 2, 21L and 21R are rear combination lamps having a stop lamp that is turned on when braking is detected, and the rear combination lamps 21L and 21R are stop lamp relays 22L and
When the contact of 22R is connected, it is turned on via the stop lamp sensors 23L and 23R. The contacts of the stop lamp relays 22L and 22R are connected by, for example, stop lamp switches 24L and 24R that operate in conjunction with the operation of a brake pedal (not shown). Also,
The contacts of the stop lamp relays 22L and 22R are also connected by the operation of a lighting relay of a stop lamp lighting control device described later.

The circuit configuration of the stop lamp lighting control device will be described with reference to FIG. In FIG. 1, 25 is a power switch, and 26 is a retarder switch. By operating the switches 25 and 26, the power valve magnet valve 27 and the retarder magnet valve 28 are actuated to drive the power retard and retarder individually. . Further, 29 is an exhaust brake switch for operating the exhaust brake, and the exhaust brake switch 29 is connected via a diode 30 to an exhaust brake magnet valve 31 as a drive means for driving the exhaust brake. The diode 30 allows only the flow of current from the exhaust brake switch 29 to the exhaust brake magnet valve 31 side. Each switch 25, 2
6, 29 are respectively connected in parallel to the lighting relay 32,
When one of the switches 25, 26, 29 is turned on, the lighting relay 32 is activated and the rear combination lamps 21L, 21R shown in FIG. 2 are turned on as stop lamps.

On the other hand, a cold start switch 33 for operating the exhaust brake when the engine is started is connected to the exhaust brake magnet valve 31, and the exhaust brake magnet valve 31 is operated by the operation of the cold start switch 33 to operate the exhaust brake. It will be in the state of doing. At this time, even if the cold start switch 33 is turned on by the diode 30, no current flows to the lighting relay 32 side, and the lighting relay 32 is not activated. That is, when the exhaust brake is operated by operating only the cold start switch 33, the rear combination lamp 21L,
21R is prohibited from lighting, and a circuit that connects the exhaust brake switch 29 to the exhaust brake magnet valve 31 via the diode 30 serves as control means. The configuration shown in FIG. 1 corresponds to the invention described in claims 1 and 2.
Reference numerals 34, 35 and 36 in the figure are diodes that are interposed between the magnet valves 27, 28 and 31 and the lighting relay 32.

The operation of the stop lamp lighting control device described above will be described. When driving a power retard or retarder, the power retard switch 25 or the retarder switch 26 is operated to operate the power retard magnet valve 2
7 or the magnet valve 28 for the retarder is operated. The lighting relay 32 is operated by operating the power switch 25 or the retarder switch 26, and the rear combination lamps 21L and 21R shown in FIG. 2 are turned on as stop lamps. When the exhaust brake is driven for braking, the exhaust brake switch 2
9 is operated to operate the exhaust brake magnet valve 31 via the diode 30. By operating the exhaust brake switch 29, the lighting relay 32 is activated and the rear combination lamps 21L and 21R shown in FIG. 2 are turned on as stop lamps. When the exhaust brake is operated to perform a cold start when the engine is started, the cold start switch 33 is operated to operate the exhaust brake magnet valve 31. At this time, even if the cold start switch 33 is operated by the diode 30, no current flows to the lighting relay 32 side, and the lighting relay 3
2 is not activated. Therefore, the cold start switch 33 is operated and the exhaust brake magnet valve 3 is operated.
Even if 1 operates, the rear combination lamps 21L and 21R shown in FIG. 2 do not light up as stop lamps.

Therefore, according to the above-described stop lamp lighting control device, even if the exhaust brake magnet valve 31 operates, the cold start switch 33 is operated to operate the exhaust brake and perform a cold start when the engine is started. In this case, the rear combination lamps 21L and 21R do not light up as stop lamps. Therefore, the stop lamp does not light up when the vehicle is not braking, and even if the vehicle is started with the cold start switch 33 being operated, there is no risk of running the vehicle with the stop lamp illuminated. Moreover, the circuit configuration is a very simple configuration using only the diode 30.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 shows an electric circuit of a stop lamp lighting control device according to a second embodiment of the present invention. The same members as those shown in FIG. 1 are designated by the same reference numerals, and duplicate description will be omitted.

The exhaust brake switch 29 is a diode 4
The exhaust brake magnet valve 31 is connected via 1 to the exhaust brake magnet valve 31 as a driving means for driving the exhaust brake.
The diode 41 allows only the flow of current from the exhaust brake switch 29 to the exhaust brake magnet valve 31 side. The cold start switch 33 is connected to the exhaust brake magnet valve 31 and the coil 43 of the relay 42. One terminal 44 of the contact of the relay 42 is the diode 4
1 front stage (exhaust brake switch 29 and diode 41
The other terminal 45 of the contact of the relay 42 is connected to the subsequent stage of the diode 41 (between the diode 41 and the exhaust brake magnet valve 31). In the relay 42, the other terminal 45 is connected to the lighting relay 32 side when the coil 43 is not excited, and the one terminal 44 is connected to the lighting relay 32 side when the coil 43 is excited. Therefore, relay 4
2, a lighting relay 32 for lighting the rear combination lamps 21L and 21R is selectively connected to a front stage or a rear stage of the diode 41, and a cold start switch 33 is provided.
When operating, the lighting relay 32 is connected to the front stage of the diode 41. That is, when the exhaust brake is operated by operating only the cold start switch 33, the lighting of the rear combination lamps 21L and 21R is prohibited, and the exhaust brake switch 29 and the cold start switch 3 are connected via the diode 41 and the relay 42.
A circuit connecting 3 to the exhaust brake magnet valve 31 and the lighting relay 32 serves as control means. The reference numeral 46 in the drawing denotes an exhaust brake switch 29 and a relay 4.
It is a diode provided between the second contact and one terminal 44 of the two contacts. The configuration shown in FIG. 3 corresponds to the invention described in claim 3.

The operation of the above-described stop lamp lighting control device will be described. Similar to the first embodiment, the power relay switch 25 or the retarder switch 26 is operated to operate the power valve magnet valve 27 or the retarder magnet valve 28, thereby turning on the lighting relay 32.
The rear combination lamp 2 shown in FIG.
1L and 21R are turned on as stop lamps. When the exhaust brake is driven for the purpose of braking, the exhaust brake switch 29 is operated to operate the exhaust brake magnet valve 31 via the diode 41. By operating the exhaust brake switch 29, the lighting relay 32 operates via the other terminal 45 of the contact of the relay 42, and
The rear combination lamps 21L and 21R indicated by are turned on as stop lamps. When the exhaust brake is operated to perform a cold start when the engine is started, the cold start switch 33 is operated to operate the exhaust brake magnet valve 31. At this time, the coil 43 of the relay 42 is excited by the operation of the cold start switch 33, and one contact 44 of the relay 42 is connected to the lighting relay 32 side, and even if the cold start switch 33 is operated, it is turned to the lighting relay 32 side. Current does not flow and the lighting relay 32 is not activated. For this reason,
Even if the cold start switch 33 is operated and the exhaust brake magnet valve 31 is operated, the rear combination lamps 21L and 21R shown in FIG. 2 do not light up as stop lamps.

Therefore, according to the above-described stop lamp lighting control device, when the cold start switch 33 is operated, the rear combination lamps 21L and 21R do not light as stop lamps, as in the first embodiment. Therefore, the stop lamp does not light up when the vehicle is not braking, and even if the vehicle is started with the cold start switch 33 being operated, there is no risk of running the vehicle with the stop lamp illuminated.

Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 shows an electric circuit of a stop lamp lighting control device according to a third embodiment of the present invention. The same members as those shown in FIG. 1 are designated by the same reference numerals, and duplicate description will be omitted.

The exhaust brake switch 29 is a diode 5
The exhaust brake magnet valve 31 is connected via 1 to the exhaust brake magnet valve 31 as a driving means for driving the exhaust brake.
The diode 51 permits only the flow of current from the exhaust brake switch 29 to the exhaust brake magnet valve 31 side. The cold start switch 33 is connected to the exhaust brake magnet valve 31, and is also connected to the contact 53 of the first relay 52 via the diode 36, and the contact 53 of the first relay 52 is connected to the lighting relay 32. The cold start switch 33 is connected to the contact 55 of the second relay 54,
The contact 55 of the second relay 54 is the coil 5 of the first relay 52.
6 is connected. Further, the coil 5 of the second relay 54
7 is connected to the exhaust brake switch 29. First
The contact 53 of the relay 52 and the contact 55 of the second relay 54 are both b contacts and are designed to open only when the coils 56 and 57 are excited. Therefore, the first relay 52
Connects the lighting relay 32 that lights the rear combination lamps 21L and 21R when the coil 56 is not excited (closed) and the subsequent stage of the diode 51, and also operates the second relay 54 when the cold start switch 33 is operated. The coil 56 is excited (powered) via
The contact 53 opens (opens). In addition, the second relay 54
The coil 57 is excited (power is supplied) from the preceding stage of the diode 51, the contact 56 is opened when the exhaust brake switch 29 is operated, and the power supply path to the first relay 52 is cut off. That is, when the exhaust brake is operated by operating only the cold start switch 33, lighting of the rear combination lamps 21L and 21R is prohibited, and the diode 5
1, the exhaust brake switch 29 and the cold start switch 33 via the first relay 52 and the second relay 54.
The control means is a circuit that connects the exhaust brake magnet valve 31 and the lighting relay 32. The configuration shown in FIG. 4 corresponds to the invention described in claim 4.

The operation of the above-described stop lamp lighting control device will be described. Similar to the first embodiment, the power relay switch 25 or the retarder switch 26 is operated to operate the power valve magnet valve 27 or the retarder magnet valve 28, thereby turning on the lighting relay 32.
The rear combination lamp 2 shown in FIG.
1L and 21R are turned on as stop lamps. When the exhaust brake is driven for the purpose of braking, the exhaust brake switch 29 is operated to operate the exhaust brake magnet valve 31 via the diode 51. By operating the exhaust brake switch 29, the coil 57 of the second relay 54 is excited to open the contact 55, and the first relay 52
The coil 56 is de-excited, the contact 53 is closed, and the lighting relay 32 operates to illuminate the rear combination lamps 21L and 21R shown in FIG. 2 as stop lamps. When the exhaust brake is operated to perform a cold start when the engine is started, the cold start switch 33 is operated to operate the exhaust brake magnet valve 31. At this time, exhaust brake switch 2
Since 9 is not operated, the coil 5 of the second relay 54
7 is de-excited and the contact 55 is closed,
The coil 56 of the first relay 52 is excited, the contact 53 is opened, no current flows to the lighting relay 32 side, and the lighting relay 32 is not activated. Therefore, even if the cold start switch 33 is operated and the exhaust brake magnet valve 31 is operated, the rear combination lamps 21L and 21R shown in FIG. 2 do not light up as stop lamps.

Therefore, according to the stop lamp lighting control device described above, when the cold start switch 33 is operated, the rear combination lamps 21L and 21R are turned on as stop lamps, as in the first and second embodiments. Never. Therefore, the stop lamp does not light up when the vehicle is not braking, and even if the vehicle is started with the cold start switch 33 being operated, there is no risk of running the vehicle with the stop lamp illuminated.

[0026]

The stop lamp lighting control device of the present invention comprises a control means for turning on the stop lamp when the exhaust brake switch is operated and for prohibiting the stop lamp from being turned on when the exhaust brake is operated only by operating the cold start switch. Therefore, the stop lamp does not light when the cold start switch is operated. As a result, even if the exhaust brake magnet valve is activated other than when the exhaust brake is driven, the stop lamp will not light up, and even if the vehicle is started with the cold start switch operated, the stop lamp will not light up. There is no risk of running the vehicle in the lit state. In particular, by using a diode that allows only the flow of current from the exhaust brake switch to the drive means side that drives the exhaust brake, the control means is a circuit in which a stop lamp and a diode are connected in parallel to the exhaust brake switch. With a very simple configuration, it becomes possible to prohibit the lighting of the stop lamp when operating the cold start switch.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of a stop lamp lighting control device according to a first embodiment of the present invention.

FIG. 2 is a lighting circuit diagram of a stop lamp.

FIG. 3 is an electric circuit diagram of a stop lamp lighting control device according to a second embodiment of the present invention.

FIG. 4 is an electric circuit diagram of a stop lamp lighting control device according to a third embodiment of the present invention.

FIG. 5 is an electric circuit diagram of a stop lamp lighting control device that can be considered in a vehicle having a cold start function.

[Explanation of symbols]

 21L, 21R Rear combination lamp 22L, 22R Stop lamp relay 25 Power tard switch 26 Retarder switch 27 Magnet valve for power tard 28 Magnet valve for retarder 29 Exhaust brake switch 30 Diode 31 Exhaust brake magnet valve 32 Lighting relay 33 Cold start switch 41 Diode 42 relay 51 relay 52 first relay 53 contact 54 second relay 55 contact 56 coil 57 coil

Claims (4)

[Claims] 1. A stop lamp that is turned on when braking is detected, an exhaust brake switch that activates an exhaust brake, a cold start switch that activates the exhaust brake when the engine is started, and an exhaust brake that drives the exhaust brake. The exhaust brake is operated by operating the drive means in conjunction with the operation of the drive means, the exhaust brake switch and the cold start switch, and turning on the stop lamp when the exhaust brake switch is operated. And a control means for prohibiting the stop lamp from being turned on when the stop lamp is turned on. 2. The control means includes the exhaust brake switch and the cold start switch connected in parallel to the drive means, and the drive means drives the exhaust brake switch from the exhaust brake switch between the drive means and the exhaust brake switch. 2. The diode according to claim 1, wherein a diode that allows only a current flow to the means side is installed, and the stop lamp is configured by a circuit connected in parallel with the diode to the exhaust brake switch. Stop lamp lighting control device. 3. The control means includes the exhaust brake switch and the cold start switch connected in parallel to the drive means, and the drive means drives the exhaust brake switch from the exhaust brake switch between the drive means and the exhaust brake switch. A diode that allows only the flow of current to the means side is installed, the stop lamp is selectively connected to the front stage or the rear stage of the diode, and the stop lamp is connected to the front stage of the diode when the cold start switch is operated. The stop lamp lighting control device according to claim 1, wherein the stop lamp lighting control device is configured by a circuit provided with a relay. 4. The control means includes the exhaust brake switch and the cold start switch connected in parallel to the drive means, and the drive means drives the exhaust brake switch from the exhaust brake switch between the drive means and the exhaust brake switch. A diode that allows only the flow of current to the means side is installed, connects the stop lamp and the latter stage of the diode when the diode is closed, and is supplied with power when the cold start switch is operated, and the first relay is opened. 2. The stop according to claim 1, wherein the circuit is provided with a second relay that is supplied with power from the preceding stage of the diode and that cuts off a power supply path to the first relay when the exhaust brake switch is operated. Lamp lighting control device.