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A arrangement for positioning a flywheel of an internal combustion engine in desired positions

IP.com Disclosure Number: IPCOM000032281D
Publication Date: 2004-Oct-29
Document File: 2 page(s) / 33K

Publishing Venue

The IP.com Prior Art Database

Abstract

A flywheel of an internal combustion engine has many times to be set in determined turning positions during service works, such as, for example, when the valves of the internal combustion engine have to be adjusted. Usually, such a positioning of the flywheel is performed manually by means of special tools, which is relative time wasting. The invention concerns internal combustion engines, which are connected to an Integrated Starter and Generator (ISG), in the form of an electric machine having a combined rotor and flywheel. According to the invention, a computer provided with suitable software is connected to an electric control unit of the vehicle, which controls the activation of the electric machine during operation of the internal combustion engine. Thereby, an operator may from a terminal, which is equipped with said computer, initiate an activation of the electric machine such that the combined rotor and flywheel turns to a desired turning position.

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A arrangement for positioning a flywheel of an internal combustion engine in desired positions

A flywheel of an internal combustion engine has many times to be set in determined turning positions during service works, when, for example, the valves of an internal combustion engine have to be adjusted or the injection units of a diesel engine. Usually, the positioning of the flywheel is performed manually by means of special tools. This work is relative time wasting and it requires that an operator is moving between different working positions.

The invention concerns internal combustion engines equipped with an electric machine, which constitutes an Integrated Starter and Generator (ISG). The electric machine comprises a rotor, which also works as a flywheel. The electric machine includes a stator fixedly arranged outside the periphery of the combined flywheel and rotor. The object of the invention is to provide an arrangement, which makes it possible to set a flywheel, which constitute a part of an Integrated Starter and Generator (ISG), in a desired turning position in a quick and simple manner.

Fig. 1 shows schematically an internal combustion engine 1 of a vehicle. The internal combustion engine 1 is, via a housing 2, which comprises a clutch mechanism, connected to a gearbox 3. An output shaft 4 is adapted to transmit a driving motion from the gearbox 3 to the driving wheels of the vehicle. The housing 2 also encases an electric machine 5, which has to serve several purposes. The electric machine 5 comprises a rotor 5a and a stator 5b, which is arranged around the periphery of the rotor 5a. The rotor 5a has here a construction such that it also is able to work as a flywheel and to co-operate with the clutch mechanism in the housing 2. Furthermore, the electric machine 5 works as generator and as starter for the internal combustion engine 1. The electric machine 5 is, via a switch member 6, connectable to a battery 7. An el...