FR2710886A1 - Blinking system of change of direction and warning for a motor vehicle. - Google Patents

Abstract

The invention relates to a turn signal and warning flashing system for a motor vehicle. In this system which includes a warning flasher switch (WBL) and a direction change flasher switch (RBL) and a control circuit, the flasher relay (3) has a switching bridge (3.1) connected to the positive pole connected (KL15), of the on-board power supply connected to the vehicle's contactor (ZU) and to the alternating contact of the switch (RBL), and a second switching point (3.2) connected to the unconnected positive pole (KL30) of the edge and alternating contact of the switch (WBR). Application to road vehicles.

Description

The invention relates to a direction change flashing system

  and warning device for motor vehicles, consisting of a flashing station for delivering an intermittent flashing signal, a warning flashing switch for transmitting the flashing signal to flashing lights on both sides of the vehicle, and a switch a direction-change flashing device for transmitting a flashing signal to the flashing lights on the right or left side of the vehicle, and in which - the direction change flashing switch has two fixed contacts, which are respectively connected to the flashing lights situated on one side of the vehicle, and an alternating contact, which is connected to a switching contact of a flashing relay, - the flashing panel comprises a control circuit comprising an integrated clock generator, and the output signal of the generator controls the control terminal of the flashing relay with a comma signal intermittent, when the flashing switch or the direction change switch has been actuated, and - the control circuit identifies, by means of a current presence interrogation, whether a flashing switch (flashing change switch) direction or flashing warning switch)

been activated.

  A blinking system of the type indicated is used in many vehicles and is described for example in the German patent application DE 41 23 270 Cl in connection with an installation warning against burglary and theft. This flashing system uses a control circuit that is controlled according to the load and includes a single flashing relay. The operation of a load-controlled control circuit is characterized in the following manner: in the idle state, the flashing relay switch is open so that when operating a flashing switch (switch change of direction or warning flashing), first only a weak current enters the flashing lights through a resistor of high ohmic value connected in parallel with the switching bridge of the flashing relay. This measurement current then triggers the clocked command of the

  flashing relay, whose short switching bridge

  the measuring resistance of high ohmic value and intermittently connects the flashing lights to the positive potential. Such a charge-controlled flashing system has the advantage that the operability of the outside wiring can be easily checked, since the flashing light current passes through the flashing switch and a disturbance in the circuit is identified by means of current or voltage interrogation at the level of the

measuring resistance.

  As is known, in these systems

  conventional, warning flashing operation

  This is activated by the fact that all the flashing lights on both sides of the vehicle are connected by

  via the warning blink switch

  and are connected in common to the cadence generator.

  This has the disadvantage that, in the warning blink operation, a lane change can not be signaled, since the right turn signal group and the turn group

  Left indicators are electrically connected in short

  circuit and can no longer be ordered individually.

  Another advantage is that to enable a warning blink operation even when the ignition is off, i.e., the ignition switch is open, the blink warning switch requires a second switching plane with a switch and three additional terminals. Therefore, when the warning blink switch is operated, the power supply terminal of the clock generator is switched from plus (terminal 15 according to DIN nomenclature) to the most permanent (terminal 30), which has the effect that the cadence generator is powered directly by the battery of the

  vehicle, bypassing the ignition switch.

  In addition, according to various documents, there are known warning flashing systems of the type having none of the disadvantages mentioned above, but having other disadvantages. Representative document is German Patent Application DE 40 30 513 A1, in which the left indicators and the right indicators are intermittently activated respectively by means of a particular load switching relay, the relays switching devices being controlled by a control circuit. The operating state of the control circuit can be predetermined by the position of simple warning flashing and direction change switches which must be connected, independently of the indicators, to the control circuit. Apart from the increased expense of wiring, a disadvantage is that for each group of indicators, it is necessary to use a particular final stage of a certain cost, equipped with a load switching relay so that the disadvantage of a high cost compared to a flashing system of the type indicated. Added to this is the fact that a particular control current passes through the warning flashing switch and the direction change flashing switch, so that a simple control of the external wiring - unlike the case of flashing systems controlled by the load, in which the flashing current passes through the flashing switches - is not possible. According to the German patent applications DE 41 13 455 A1 and DE 41 37 611 A1, load-controlled flashing systems are also known and in which from a common connection terminating at the most permanent (terminal 30) the current channels for the warning blink and the direction change blink are separated by a load switching relay, which is arranged as a two-contact relay and is controlled in a controlled manner.

clocked in a synchronous manner.

  The object of the invention is to reduce the expense for the warning flashing switch contact systems by slightly modifying a warning flashing system of the type indicated advantageous controlled by the load. In addition, it must be possible to perform an extension of the assembly using simple means so as to be able to display a change

  direction of movement also during the function-

  warning blink.

  This problem is solved according to the invention by virtue of the fact that the flashing relay has a double contact, and the first switching bridge of the flashing relay is connected on the one hand to the positive pole of the connected on-board electrical system. by means of the ignition switch of the motor vehicle, and on the other hand to the alternating contact of the direction change flashing switch, and - the second switching bridge of the turn signal relay is directly connected directly to the pole positive feedback from the onboard network and on the other hand to the alternating

warning blink.

  According to another characteristic of the invention, the control circuit comprises a current interrogation system for the closed warning circuit during the operation of the warning flashing switch, and a current interrogation system, independent of the previous one and which is provided for the closed change of direction circuit during the actuation of the

  change direction blink switch.

  According to another characteristic of the invention, the two switching bridges of the flashing relay are open in the rest position and in parallel with these switching bridges is connected respectively a measuring resistor whose voltage drop is

  interrogated by the control circuit.

  According to another characteristic of the invention, during a simultaneous actuation of the warning flashing switch and the direction change flashing switch, the clock generator delivers an intermittent control signal, which differs from that delivered in the case of the actuation of

  only one of the flashing switches.

  According to another characteristic of the invention, respectively a decoupling diode is inserted in the two lines, which connect the warning flashing switch to the group of flashing lights on the left or

  to the group of flashing lights on the right.

  According to another characteristic of the invention, when the two flashing switches are actuated simultaneously, the flashing relay is deactivated, so that the two switching bridges are open, and a final power stage introduces a flashing current. intermittent in the line that connects the direction change flashing switch to the

control circuit.

  According to another characteristic of the invention, the final power stage is controlled, on the input side, by a second output signal of the generator of the control circuit. The essential idea of the invention consists in providing, respectively for the warning flashing and for the display of the direction of movement, a particular channel of the flashing current, controlled by the load with respectively a particular unit of current interrogation, the channels being controlled separately, but in a synchronous manner, by the load switching relay, realized in the form of a two-contact relay. Therefore, to achieve cost savings, it is necessary to use only one load switching relay. Similarly, the second switching plane located in the warning flashing switch for switching from the most to the most permanent power supply can be suppressed since one can make different power connection with

  the separate current paths for flashing warning

  tion and the direction of travel.

  In addition, a separate interrogation of the current makes it possible to distinguish an actuation of the change of direction switch, of an actuation of the warning flashing switch, and also to clearly identify their simultaneous actuation. This possibility is used in an alternative embodiment in that, in the case of a simultaneous actuation of the direction change flashing switch and the warning flashing switch, the flashing relay is deactivated and therefore is open. , while a flashing current is introduced by a

  auxiliary clock generator in the flashing channel

change of direction.

  Other features and benefits of the

  present invention will emerge from the description given

  BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 represents an exemplary embodiment of the flashing installation according to the invention; and FIG. 2 shows an alternative embodiment of the flashing system according to

  the invention, which allows an indication of the direction of movement in operation with flashing warning.

  The blinking system of FIG. 1 consists of a blinker unit 1 and external components such as a WBL warning blink switch, a RBL direction blink switch, a ZU ignition switch and the two groups of LL and LR turn signals. The flashing station 1 still contains, on a common board, an electronic control circuit 2 (microcomputer) comprising terminals 2.1 - 2.5 and circuit elements 20 connected to these terminals, in particular a flashing relay 3 and other contacts for connecting external components. A first power supply terminal 2.1 of the control circuit 2 is connected to the positive (more permanent) potential KL30, namely the terminal 30 in the nomenclature of the German DIN standard, of the basic network. A warning signal terminal 2.2 is connected to the alternating contact of a warning flashing switch WBL in the form of a double-action relay, the two fixed contacts of which are respectively connected to the LL indicators on the left-hand side of the vehicle. and the LR turn signals on the right side of the vehicle. The second power supply terminal 2.3 is connected to the positive potential (plus) KL15, namely terminal 15 in the nomenclature of the German DIN standard, applied via the ignition switch ZO. A direction change signal transmission terminal 2.4 is connected to the alternating contact of the direction change flash switch RBL, which is embodied as a neutral position inverter, which has a neutral center position, and whose two fixed contacts are also connected respectively to the left turn signal group LL and to the right turn signal group LR. An output 2.5 of the generator controls, via a final stage not shown, a flashing relay 3, which is embodied in the form of a bipolar power switch. When the flashing relay 3 is activated, the two switching bridges 3.1, 3.2 are in the

  closed position, the first switching bridge 3.1

  circuiting the first power supply terminal 2.1 on the warning signal transmission terminal 2.2, while the second switching pole 3.2 bypasses the second power supply terminal 2.3 on the terminal 2.4 of the direction change flashing signal . In addition, the two switching bridges 3.1, 3.2 are shunted respectively by a measuring resistor R1 or R2, which has a high resistance value compared to the internal resistance of the turn signals LL, LR. The operation of the flashing system is as follows: When only the warning flashing switch is operated, the two groups of indicators LL, LR, are connected to the more permanent terminal KL30 via the measuring resistor R1. As a result, in R1 a measuring voltage drops out which, via the signal blinking signal transmission terminal 2.2, triggers the control circuit 2 so that the flashing relay 3 is controlled in a controlled manner. intermittent via output 2.5 of the generator. As a result, the measuring resistor R1 is shunted by the switching bridge 3.1 in a clockwise manner so that the turn signals LL, LR are intermittently connected to the plus permanent terminal KL30, as long as the flashing switch warning WB is closed and that the voltage drop is maintained across the measuring resistor R1. Being

  given that the path of the flashing warning current

  is powered from the more permanent KL30 pole, the warning flashing operation is

  independent of the position of the ignition switch ZU.

  When only the RBL direction change flash switch is operated, the group

  selected LL or LR turn signals is connected through

  of the second measuring resistor R2 to the plus pole KL15 which is connected via the ignition switch ZU. The measuring voltage, which thereby drops in the measuring resistor R2, triggers the control circuit 2 via the transmission terminal 2.4 of the direction change flashing signal so that, in an all similar to the case of the operation of the warning blink, output 2.5 of the generator intermittently controls the blinker relay as long as the voltage drop is present. Therefore, the measuring resistor R2 is shunted clockically by the switching bridge 3.2 so that the selected group of flashers LL or LR is intermittently placed at the plus pole KL15. Since the path of the direction change flashing current is connected to the positive potential via the ignition switch Zu, the direction change flashing operation

  is only possible when the ignition is connected.

  The switching bridge 3.1 of the flashing path

  warning lamp, which is connected together in the case of single direction change flashing, has no influence since the warning flashing switch WBL is open and therefore the flashing current channel of warning is interrupted. It is the same

  naturally for the general operation of flashing

  the switching bridge 3.2 is simultaneously activated, but the path of the direction change flash signal is interrupted by

  the signal transmission switch RBL flashes

change of direction.

  Since the flashing unit according to the invention requires, outside the power terminals

  KL30, KL15, only two lines that stand out from

  that is, lead to the flashing switches

  WBL, RBL, the cabling cost is reduced by

  compared to all other indicated flashing systems

  ment. In addition, a simple alternative switch is sufficient

  for the WBL flashing warning switch.

  Simultaneous actuation of the climate switch

  The RBL change of direction and the warning blink switch WBL can be identified by the control circuit 2, based on the voltage drops occurring simultaneously in the two measuring resistors R1, R2. But since the two groups of LL, LR turn signals are short-circuited via the WBL warning blink switch, all

  the turn signals are controlled in a clocked manner in common.

  However one can imagine to provide for a change of lane envisaged during the operation of the flashing warning, a particular rate of blinking so that a vehicle behind can be warned, even without any indication of the direction of

change of lane.

  An additional improvement can be obtained with the embodiment shown in FIG. 2 which will be described below. For this purpose, as a first arrangement, the flashing system according to the invention is completed by decoupling diodes D1, D2, which are inserted into the lines connecting the two respectively.

  fixed contacts of the warning blink switch

  WBL to both groups of LL, LR turn signals. The diodes D1, D2 are polarized so that in the forward direction, the flashing warning current, controlled in a clocked manner can power the turn signals LL, LR. On the other hand, the diodes prevent that a direction change flashing current, introduced through the RBL direction change flashing switch, is introduced, while the warning blink switch WBL is simultaneously operated. , in the turn signal group, which is not selected by the operation of the RBL direction change flash switch. Due to the decoupling, the two line ends, which are connected in FIG. 2 to the fixed contacts of warning flashing switches, are permanently connected and are connected in common to a fixed contact so that one could also use, as WBL warning blink switch, a

simple closing contact.

  As a further provision, there is provided a second output 2.6 of the generator, by means of which an intermittent direction change flashing current can be introduced, via a final power stage 4, into the line terminating at the contact Alternate RBL direction change flashing switch. The control circuit 2 is arranged or programmed so that, when the warning blink switch WL is simultaneously actuated

  and the direction change blink switch

  RBL, the flashing relay 3 is disabled. Lake-

  simultaneous operation of the two flashing switches WBL, RBL is indicated, as previously described, by the simultaneous occurrence of a voltage drop in the

  measuring resistors R1, R2 of the control circuit 2.

  When the flashing relay 3 is in the rest position, its switching bridges 3.1, 3.2 are open and in particular there is no flashing current

  transmitted in time by the flashing relay 3.

  Instead, the latter is introduced by the second output 2.6 of the generator and the final power stage 4 connected downstream and is sent through the RBL direction change flashing switch,

  to the selected group of LL or LR turn signals.

  If one of the flashing switches RBL, WBL is opened again, this is indicated to the control circuit 2 by the disappearance of the corresponding voltage drop in one of the measuring resistors R1, R2, after which the control circuit 2 goes back to the flashing mode controlled in a clocked manner by

the flashing relay 3.

  Since the blinking of change of

  direction during blinking operation of warning

  While this is a comparatively rare and only transiently requested function, the final stage 4 may be designed in accordance with this reduced requirement of a clocked emergency command. In particular, one can dispense with using another power switching relay. In order to protect the final stage 4, it is furthermore possible to provide that the emergency clocked command with the direction display is only activated transiently and, at the end of the lapse of a predetermined time interval, is

  brought back into the blinking operation of warning

  with a time-controlled command, via the flashing relay 3. From a total point of view, for a same function range, a cost reduction is obtained with respect to the previously mentioned flashing systems respectively comprising a relay

  power switching for each side of the vehicle.

Claims (7)

R E V E N D I C A T I ON   1. Motor vehicle direction and warning flashing system consisting of a flashing station for delivering an intermittent flashing signal, a warning flashing switch for transmitting the flashing signal to flashing lights. located on both sides of the vehicle, and a direction change flashing switch for transmitting a flashing signal to the flashing lights on the right or left side of the vehicle, and in which - the direction change flashing switch has two contacts fixed, which are respectively connected to the flashing lights on one side of the vehicle, and an alternating contact, which is connected to a switching contact of a flashing relay, - the flashing panel comprises a control circuit comprising a rate, and the output signal of the generator controls the terminal of control of the flashing relay with an intermittent control signal, when the flashing switch or the change of direction switch has been actuated, and   - the control circuit identifies, by means of a   presence of the current, if a flashing switch   either (change of direction flashing switch or warning flashing switch) has been actuated, characterized in that the flashing relay (3) has a double contact, and - the first switching bridge (3.2) of the relay of blinker (3) is connected on the one hand to the positive pole (KL15) of the on-board network, which is connected via the ignition switch (ZU) of the motor vehicle, and on the other hand to the alternating contact of the switch direction change flashing (RBL), and - the second switching bridge (3.1) of the flashing relay (3) is directly connected to the   positive (KL30) of the on-board network and on the other hand to the alternating contact of the warning flashing switch5 (WBL).   2. A direction change and warning flashing system according to claim 1, characterized in that the control circuit (2) comprises a current interrogation system for the closed warning circuit during the actuation of the flashing warning switch (WBL), and a system   The current interrogator, independent of the previous one, is provided for the closed direction change circuit upon actuation of the direction change flash switch (RBL).   A direction change and warning flashing system according to claim 2, characterized in that the two switching bridges (3.1, 3.2) of the flashing relay (3) are open in the rest position and that parallel with these switching bridges is connected respectively a measuring resistor (R1 or R2), the voltage drop of which is interrogated by the control circuit (2).   4. A direction change and warning flashing system according to claim 2, characterized in that, when the warning blink switch (WBL) and the change of direction blink switch (RBL) are simultaneously actuated (RBL). ), the clock generator delivers an intermittent control signal, which differs from that delivered in the case of the actuation of only one of the blinker (RBL, WBL).   A direction change and warning flashing system according to claim 2, characterized in that respectively a decoupling diode (D1 or D2) is inserted in the two lines, which connect the warning flashing switch (WBL). ) to the group of flashing lights on the left (LL) or   group of flashing lights on the right (LR).   Direction change and warning system according to Claim 5, characterized in that, when the two flashing switches (RBL, WBL) are simultaneously actuated, the flashing relay (3) is deactivated. so that the two switching bridges (3.1, 3.2) are open, and a final power stage (4) introduces an intermittent flashing current into the line which connects the flashing switch of   change of direction (RBL) to the control circuit (2).   7. System of change of direction and warning   in accordance with claim 6, characterized in that the final power stage (4) is controlled on the input side by a second output signal (2.6) of the generator of the control circuit (2).