DE29907587U1 - Automatic shutdown and reporting of electricity consumers in motor vehicles - Google Patents

Description

"Automatic shutdown and reporting of power consumers in vehicles."

DESCRIPTION

FiQ. 1

Automatic shutdown of the trunk lighting

If the trunk is left open for an extended period of time, e.g. after the vehicle has been parked in the garage, the fully charged battery will be completely discharged after about 4 days.

This failure cannot occur if the circuit is extended to include the delayed-action relay d as shown in Fig. 1, since the contact of this relay interrupts the circuit after a certain time. The contact of the limit switch b is closed when the trunk lid is open. In this switching state, the lamp h of the trunk lighting can be switched on again by closing and then opening the trunk lid, because this briefly opens the limit switch b (relay d drops out) and closes it again (relay d energizes). The control lamp K informs the driver whether the trunk lid is open or closed when the ignition switch Z is switched on.

Fig.2

Automatic switching off of interior lighting

In daylight, it may happen that the interior lighting is not switched off. As a result, a fully charged battery is completely discharged after about 2 days. This can be prevented by a circuit as shown in Fig. 2. Accordingly, the lamp h is switched on when the integrated switch is in position T and the door limit switch b1 or b2 is closed (door open).

If the interior light switch is in position 31 and the contact
of the delayed release relay d is closed, then the interior light h lights up regardless of the position of the door limit switches b1 or b2. The contact of relay d is closed for the entire time the ignition switch Z is switched on, since the relay d is energized during this time. If the ignition switch Z is switched off, the contact of relay d remains closed for a certain time. After this time has elapsed, the contact of relay d opens, which automatically interrupts the lamp circuit.

Fig.3

Automatic shutdown of the car radio

The car radio g is switched on and off using switch b. If the vehicle is not used for a few days and the car radio is not switched off, e.g. because the volume is too low or because you are in a hurry, then a fully charged battery will be discharged after about a day. A circuit as shown in Fig. 3 prevents this from happening.

Accordingly, the automatic switch-off of the car radio g is carried out by the relays d1 and d2. As long as the ignition switch Z is switched on (contacts 30 and 15 closed), the relay d1 is energized, its contact is open, and the delayed-action relay d2 is in the rest position, i.e. its contact is closed. If the ignition switch Z is switched off, d1 drops out, its contact closes, and d2 is switched on.

After a certain time, its contact opens and thus interrupts the circuit of the car radio g. If you want to continue listening to the radio, switch b must be turned off, which causes d2 to assume its rest position, i.e. its contact closes. If switch b is closed in this switching state, the radio g is operated again until the switch-on time of d2 has elapsed and the radio g is automatically switched off again.

Fig. 1 to Fig. 3

All shutdown functions can also be implemented electronically.

Fig.4

The switched-on state of a power consumer SV is reported by the electronics E through the control lamp KL. The electronic device E contains an "AND gate" for each power consumer to be monitored, at whose input el positive potential is applied when the power consumer SV is switched on. As a further criterion, for example, positive potential can be applied to the input e2 by connecting a "NOT gate" when the limit switch TK of the driver's door is open (driver's door closed). The input e3 receives positive potential when the ignition switch Z is switched off. For this purpose, a "NOT gate" must be connected to the input e3, which has positive potential at the output a when there is no potential at the input e. The outputs a of the "AND gates" lead to the inputs e of an "OR gate". If there is positive potential at each input of an "AND gate", its output a also has positive potential. This means that positive potential also reaches the output a of the "OR gate", which is used to control the control or flashing lamp KL. The "TIME gate" switches off the control lamp KL after a certain time.

The indicator lamp must be installed within the driver's field of vision, e.g. near the door handle, so that the driver is informed that an electrical device is still switched on when locking the driver's door.

In addition to the already mentioned AND conditions, the parking position of the ignition switch and the seat occupancy can also be extracted.

Furthermore, the activation of a power consumer can be detected by a relay that is connected in parallel or in series with the power consumer. It is also possible to connect a resistor in series with the power consumer, where the voltage drop is tapped and can be processed accordingly.

The electronics E and the control lamp KL can be retrofitted to any vehicle without great effort.

Notice

Automatic headlight switch-off in motor vehicles, utility model

No. 298 061 06.6, can also be carried out using the method described here.

Claims (1)

The automatic shutdown of power consumers in motor vehicles is characterized by the fact that, 1. the trunk light, interior light, radio and other power consumers are automatically switched off by a time relay when the ignition switch is turned off. 2. the switched-on state of any number of power consumers is processed in an electronic system in such a way that when the ignition starter switch is switched off and additional criteria, such as the driver's door being closed, a visual message appears briefly or an acoustic signal sounds when one or more power consumers are switched on. 3. all input signals required by the electronics of the existing electrical system of a vehicle can be tapped without additional measures.