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Starting method and control device of heat engine

A heat engine and engine technology, which can be used in the starting of the engine, the starting of the engine with the motor, the starting device with the mechanical power storage, etc., and can solve the problems of accelerating the motor wear and the like

Active Publication Date: 2015-08-05
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, in order to drive the shaft of the heat engine, the wear of the electric motor is accelerated

Method used

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  • Starting method and control device of heat engine
  • Starting method and control device of heat engine
  • Starting method and control device of heat engine

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Embodiment Construction

[0034] In the following description, features and functions well known to those skilled in the art will not be described in detail.

[0035] figure 1 A top view partially showing the front of the car 2 . For example, the car 2 is a car such as a sedan. The vehicle 2 is equipped with an internal combustion heat engine 4 . The engine 4 is equipped with a shaft 6 , which drives the drive wheels 8 , 10 of the motor vehicle 2 in rotation.

[0036] Typically, the engine 4 is a four-stroke engine with four cylinders 12 to 15 . In one such engine, two revolutions of the shaft 6 effect a complete cycle of the piston in the cylinder. Axis 6 has an inertia denoted J and considered constant. Under this inertia, the shaft 6 can continue to rotate during a few hundred milliseconds after the engine 4 is called to stop.

[0037] The shaft 6 is mechanically connected to the shaft 18 of the electric motor 20 by means of a drive belt 22 . The electric motor 20 is designed to drive the sha...

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PUM

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Abstract

The invention relates to a method for controlling the start-up of an internal combustion heat engine, said method comprising: controlling (56) assisted start-up of the heat engine wherein an electric motor rotates the shaft of the heat engine; and alternately, controlling (54) independent start-up of the heat engine wherein use is made solely of the residual rotation of the engine shaft which continues to rotate by the inertia thereof since the last stoppage of the engine, characterized in that the method comprises: predicting (46) the number of top dead center positions remaining before reaching a zero engine speed; and choosing (52) between assisted or independent control on the basis of said predicted number of positions.

Description

[0001] This application claims priority from French application 1052043 filed on March 22, 2010, the content of which (text, drawings and claims) is incorporated by reference. technical field [0002] The invention relates to a starting method and a control device for an internal combustion heat engine. Background technique [0003] Known methods include: [0004] Controlling the assisted starting of the heat engine, wherein the electric motor drives the heat engine shaft in rotation, and as an alternative, [0005] • Controlling the autonomous start of the heat engine, where only the remaining rotation of the engine shaft, maintained by its inertia, since the engine's most recent stop is utilized. [0006] Autonomous starting is a method of starting that drives the heat engine shaft in rotation without resorting to an electric motor type starter or alternator-starter. This is possible due to the fact that the engine shaft continues to rotate due to its inertia during the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02N11/08
CPCF02N99/006F02N5/04Y02T10/48F02N11/0844Y02T10/40
Inventor F·达佩
Owner PEZHO SITROEN AUTOMOBILS SA