Method for preparing the start-up of an internal combustion engine by means of a belt-driven starter generator

A starter generator, belt drive technology, which is used in the starting of the engine, the starting of the engine with an electric motor, and the starting device with a mechanical power storage, etc., can solve the problem of difficult design of belt tension, and achieve the effect of low vibration

Active Publication Date: 2014-11-12
ROBERT BOSCH GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the tension of the belt is difficult to design due to the alternation of the tight side and the loose side in the operation of the motor and the operation of the generator

Method used

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  • Method for preparing the start-up of an internal combustion engine by means of a belt-driven starter generator
  • Method for preparing the start-up of an internal combustion engine by means of a belt-driven starter generator

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Embodiment Construction

[0019] Refer below figure 1 and 2 The invention is described wherein like elements are provided with like reference numerals.

[0020] exist figure 1 A preferred embodiment of the present invention is explained with reference to a system 200 composed of an internal combustion engine 300 , a belt-driven starter generator 100 as an electric motor and an on-board network 30 .

[0021] Internal combustion engine 300 is connected to starter generator 100 via a belt 310 , wherein a belt tensioner in the form of an oscillating belt tensioning system 320 is provided which can tension belt 310 during operation independently of the torque direction.

[0022] exist figure 2 The starter generator 100 is shown as a wiring diagram in FIG. The starter generator has a generator part 10 and a converter part 20 . The converter components are usually operated as rectifiers in generator operation of the machine and as inverters in motor operation.

[0023] The generator part 10 is shown on...

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Abstract

The invention relates to a method for preparing the start-up of an internal combustion engine (300) by means of a belt-driven starter generator (100), which has a stator winding (11) and a rotor winding (12), wherein the starter generator (100) is operated such that the generated torque thereof gradually increases over a duration of more than two rotor winding time constants. Current is fed to the stator winding (11) in such a manner that the generated torque gradually increases over a duration of more than two rotor winding time constants. Current is fed to the rotor winding (12) and, if an excitation current through the rotor winding (12) is below a lower threshold before the current feed, the stator winding (11) is fed with current before the excitation current is above an upper threshold. According to the invention, the belt of the starter generator is pretensioned prior to the actual starting process by means of actuation of the electrical machine and thus lurches, vibrations and noises that occur during the start-up of the internal combustion engine by means of a starter generator can be prevented.

Description

technical field [0001] The invention relates to a method for preparing a start-up of an internal combustion engine by means of a belt-driven starter generator and to a computing unit for carrying out the method. Background technique [0002] The electric machine can be used in a motor vehicle as a so-called starter generator to start the internal combustion engine on the one hand in motor operation of the electric machine and on the other hand in generator operation of the electric machine to generate The current through which the battery is charged. The starter generator can be connected to the internal combustion engine or the crankshaft via a belt drive. [0003] In particular separately excited three-phase current synchronous machines are suitable for use as belt-driven starter generators (RSG), since the torque of the motor can be adjusted particularly well. The desired torque can be set by corresponding actuation of the rotor winding (excitation coil) and / or the stat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02N11/04
CPCF02N2300/104F02N11/04F02B67/06F02D41/062F02N15/08F02N2011/0896F02N11/08
Inventor A.雅各布M.施密特
Owner ROBERT BOSCH GMBH
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