Starting device for an internal combustion engine, especially of

Details Starting device for an internal combustion engine, especially of Starting device for an internal combustion engine, especially of

1997-07-24

2000-11-21

Dolinar, Andrew M.

Internal-combustion engines

Starting device

Condition responsive control of starting device

290 38R, F02N 1108

Patent

active

061487813

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a starting device for starting an internal combustion engine, in particular of a motor vehicle, with a starter motor which can be connected via a starter relay with a voltage source and can be engaged with the internal combustion engine for turning the engine over, and an electronic device for triggering the starter relay.
2. Prior Art
It is known that internal combustion engines must be started by means of a starter, since they do not start up by themselves. Starter motors are usually employed for this, which are connected to a voltage source by means of a starter relay embodied as a so-called solenoid switch, and simultaneously a pinion gear of the starter motor is brought into engagement with the internal combustion engine for turning it over. For switching the starter relay on, it is known to trigger it by means of an external switch, for example an ignition switch or starter switch of the motor vehicle or an external relay. The relatively high current which flows when the starter relay is activated can be better controlled by means of this. By means of this current the starter relay generates the required force for shifting the starter and to close a contact bridge for connecting the starter motor with the voltage source. In a known manner the starter relay has a pull-in winding and a holding winding for this. Following the completed start, the starting process is terminated by the driver of the motor vehicle by disconnecting the voltage source from the starter motor.
A control circuit for triggering the starter relay is known from DE-OS 28 36 047, by means of which an erroneous manual operation of the starter relay, for example via an ignition switch, a starter switch or a combined ignition-starter switch, is intended to be prevented. Further than that, electronic installations are known, for example from U.S. Pat. No. 4,739,736, which are used for triggering the starter relay of a starter.


SUMMARY

It is an object of the present invention to provide an improved starting device of the above-described kind for starting an internal combustion engine, particularly a motor vehicle, especially which operates in a more dependable manner.
According to the invention the starting device for starting an internal combustion engine includes: advantageously comprising a pinion gear, for turning over the internal combustion engine; battery and a regulated generator connected with the battery for charging it; activate the starter motor; and relay connects the voltage source with the starter motor; electronic relay is mounted on the starter motor or in the starter relay and has a logic signal input for control signals from a motor controller of the internal combustion engine; and a redundancy circuit in which the power module has two transistors redundantly coupled with each other by means of a logic circuit.
The starting device in accordance with the invention with the offers the advantage, that the starting process of the internal combustion engine can take place automated and simultaneously coordinated as a function of further functional states of the motor vehicle. Because the electronic installation is constituted by an electronic relay disposed on or in the starting device and can be triggered via a logic signal input by an electronic engine control device of the motor vehicle, it is advantageously possible to achieve the low-output and therefore low-energy and wear-free initiation or the termination of the starting process. Various control functions of the starter relay can be contacted in a simple manner by means of the electronic triggering via an engine control device which as a rule is provided in a motor vehicle. It is possible in this way to achieve the supply of the starter relay with pull-in and holding current during the starting process, a dependable disconnection of the pull-in and holding current, or possibly only the holding current, at the termination of the starting process. Following the termination of the starti

REFERENCES:
patent: 4209709 (1980-06-01), Betton
patent: 4533016 (1985-08-01), Betton
patent: 4731543 (1988-03-01), Buetemeister et al.
patent: 4739736 (1988-04-01), Branco
patent: 5550701 (1996-08-01), Nadd et al.

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