DE3229022A1 - Shut-off and restart device for internal combustion engines of motor vehicles - Google Patents

Abstract

With an automatic shut-off and restart device for internal combustion engines of motor vehicles, the warning lights for the operating functions of the internal combustion engine and/or of the motor vehicle are at least almost completely dimmed when the internal combustion engine is shut off and kept continuously dim until starting takes place.

Description

Shut-off restart device for internal combustion engines from

Motor vehicles The invention relates to a parking restart device for internal combustion engines of motor vehicles, in which the switching off and starting automatically when defined operating conditions of the internal combustion engine are present, their actuators and / or the motor vehicle.

Such devices are increasingly used. They serve to unnecessary running of the internal combustion engine when the motor vehicle is stationary avoid and reduce fuel consumption. Known devices of this type, as known for example from German patents 21 58 095 and 24 24 773 are, differ only in terms of the criteria in which the parking and restarting the internal combustion engine takes place. None of these devices However, it is intended to keep the driver from superfluous and sometimes even annoying To relieve ads.

The aim of the present invention is to provide such relief to accomplish.

The invention solves this problem in that when the internal combustion engine is switched off the control lights for operating functions of the internal combustion engine and / or the motor vehicle witnesses are at least almost completely switched off and remain dark until the engine is started.

Such control lights are used, for example, to indicate that the signal is too low Indicate oil pressure or a too low output voltage of the vehicle generator. They also provide information about the switched-on status of the vehicle lights and others electrical consumer. Are these indicator lights between switching off and restarting the internal combustion engine is switched off, the driver is not through during this time which, especially at night, at least partially with constant high brightness glowing control lights irritated. At the same time, however, there is no loss of information connected for the driver, since he is both at the start of the journey and while doing it manual starting process and before switching off and after restarting the internal combustion engine on the basis of the control lamps that may then be illuminated receives the necessary information.

In addition to control lights that are activated immediately when the internal combustion engine is started go out, as is the case, for example, with the charge indicator light there are also indicator lights that only function properly when they are functioning properly go out after a certain time delay after starting the internal combustion engine. this is for example with the control lamp for the oil pressure as a result of the delayed Pressure build-up or in the case of control lamps that depend on the operating voltage as a result of the at If the vehicle generator is running, higher operating voltage levels are the case. In this In this case, it can be advantageous that the control lights also after restarting remain dark for a specified short time. In this case will be a brief, possibly also irritating re-flashing the control lights avoided immediately after starting the internal combustion engine.

An embodiment of the invention is shown schematically in the drawing and is explained below.

As part of a shutdown and restart device for the internal combustion engine of a motor vehicle, shutdown / restart signals are generated when the specified conditions are present generated. For example, the signal for "turn off" when the presence of a low Speed of the internal combustion engine, the speed zero and the actuation of the Clutch pedal are triggered. This signal becomes one. not shown Device with e.g. bistable switching elements, supplied and effected, for example by interrupting the injection and switching off a fuel pump the internal combustion engine. This signal is also a bistable via a line 1 Switching element 2 is supplied, which controls a transistor 3. This controls a relay coil 4, their contacts 5 and 6 in series with control lights 7 and 8 for oil pressure and generator voltage and their transmitters 9 and 10, shown schematically as switches, are located.

The switching element 2 receives a restart signal via a further line 11, for example, the same as the signal for controlling an electrical (not shown) Fuel pump is. However, this signal does not arrive immediately, but through a Timing element 12 by a specified time of e.g. 2 seconds, delayed relative to the switching element 2.

Based on an operation of the internal combustion engine takes place when present the shutdown signal under defined conditions.

This leads to the fact that the switching element 2 via the transistor 3 and the relay coil 4 interrupts the supply lines of the control lights 7 and 8. During the entire period in which the internal combustion engine is then switched off, the control lights 7 and 8 are switched to dark.

The driver is therefore not disturbed by them or by the display an apparent one, in reality only by switching off the internal combustion engine conditional insufficient Operational function confused. After restarting the internal combustion engine receives the starting signal, delayed by the timer 12, via line 11 to switching element 2 and resets it to its original state return. As a result, the contacts 5 and 6 go into the closed state and enable the senders 9 and 10 as before the engine was switched off, the control lights 7 and 8 to be switched on if the operating function is inadequate.

L e rs e it e

Claims (2)

Claims: 9 shutdown and restart device for internal combustion engines of motor vehicles that are parked and started automatically if they are present defined operating conditions of the internal combustion engine, its actuators and / or the motor vehicle, characterized in that when parking the internal combustion engine, the control lights (7, 8) for operating functions of the internal combustion engine and / or leave the motor vehicle at least approximately completely and up to the start are switched to permanently dark. 2. Apparatus according to claim 1, characterized in that the control lights (7, 8) even after restarting for a specified short time (timer 12) are still switched to dark.