Method and device for start-stop systems of internal combustion engines in motor vehicles

Abstract

The invention relates to a starting method for internal combustion engines in motor vehicles, comprising a start-stop system, and to a starting device (10) for carrying out said method, said starting device comprising a starter motor (11) and an insertion device (12, 20) which axially inserts a slip-on pinion (13) into a crown gear (14) of the internal combustion engine when a stop cycle begins. In order to minimize the period until the engine can be restarted, the pinion (13) is resiliently inserted into the still rotating crown gear (14) by means of a pressure spring (25) when the stop phase begins, once the internal combustion engine (15) is switched off but before it comes to a standstill and with the starter motor (11) switched off.

Description

technical field [0001] The invention relates to a method for starting an internal combustion engine with a start-stop system in a motor vehicle according to the preamble of claim 1 and to a method for carrying out the method according to the preamble of claim 4 starting device. Background technique [0002] The internal combustion engine of the motor vehicle is usually started by means of a starter motor, wherein first the pinion of the starter device is engaged in the ring gear of the internal combustion engine before the starter motor is switched on. Furthermore, in the event of a prolonged standstill of the vehicle, the internal combustion engine is automatically switched off by the start-stop system in the motor vehicle and then restarted automatically again at the end of the standstill phase in order to be able to continue driving. [0003] It is known from EP 08 48 159 A1 to bring the starter pinion into the meshed position already with the start of the standstill of ...

AI Technical Summary

Problems solved by technology

However, this solution has the disadvantage that in order to engage the starter pinion at the beginning of the stop phase, it is still necessary to wait for the internal combustion engine to stop, which means a delay during very short stop phases, for example in a traffic jam due to too fast The following vehicle can be very critical

The disadvantage here is that a very considerable electronic control effort must be incurred for synchronizing the peripheral speeds of the ring gear and the starter pinion, since the peripheral speed of the ring gear is caused by the internal combustion engine cylinder during coasting of the switched off internal combustion engine. Compression varies a lot

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