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Method to assist with the starting of a motor vehicle combustion engine

A technology for motor vehicles and heat engines, which is used in engine starting, engine starting with an electric motor, machine/engine, etc., and can solve problems such as low performance and convenience.

Active Publication Date: 2017-05-31
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In general, the performance and convenience of an initial start of a motor vehicle (performed while the engine is hot and the vehicle is stationary) depends only on the state of the auxiliary battery powering the starter and is therefore seldom optimal , especially at low temperature

Method used

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  • Method to assist with the starting of a motor vehicle combustion engine
  • Method to assist with the starting of a motor vehicle combustion engine

Examples

Experimental program
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Effect test

Embodiment Construction

[0026] figure 1 The power supply circuit for a motor vehicle V of electric or hybrid type shown in includes a first DC voltage source 1 integrated in a primary circuit 2 comprising:

[0027] • DC / AC converter 3, which supplies power to the traction motor Me coupled to the heat engine Mt through the coupling system Ac for transmitting the engine torque to the gearbox Bv,

[0028] • A switch 9 for opening and closing the primary circuit, whose state change is controlled by an electronic control system 10, such as an electronic control unit ECU.

[0029] This power supply circuit also includes a secondary circuit 5, which constitutes the on-board network of the vehicle V, which is powered by a second DC voltage source 6 and includes a starter D, a sensitive loads (e.g. 7) and non-sensitive loads (e.g. 8).

[0030] In general, for a hybrid vehicle, the first voltage source 1 comprises a battery or battery pack, such as a lithium-ion battery or a Ni-MH battery, which provides a n...

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PUM

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Abstract

The subject of the present invention is a method to assist with the starting of a combustion engine (Mt) of a motor vehicle (V) comprising an onboard network (5) powered by a low-voltage auxiliary battery (6) and by a voltage-controlled DC current source (4). According to the invention this method is first of all initiated when the control electronics (10) of the vehicle (V) are awakened as a result of a specific action performed by a user, liable to be followed by an action of starting the combustion engine (Mt). In addition, this method involves operating the current source (4) in such a way as to cause it to operate at its maximum power for a length of time suited to achieving maximum positive polarization of the auxiliary battery (6) and then, at the end of this length of time, in the absence of any actual command to start, operating the current source (4) in such a way as to cancel the current circulating in the auxiliary battery (6).

Description

technical field [0001] The invention relates to a method for assisting the starting of a thermal engine of a motor vehicle comprising an on-board network supplied by a low-voltage auxiliary battery, such as a lead-acid battery, and by a direct current source of the voltage-controlled type, such as DC / DC voltage converter. Background technique [0002] In general, the performance and convenience of an initial start of a motor vehicle (performed while the engine is hot and the vehicle is stationary) depends only on the state of the auxiliary battery powering the starter and is therefore seldom optimal , especially at low temperatures. [0003] The invention aims at overcoming this disadvantage for motor vehicles comprising two on-board network power supplies, in particular of the hybrid or electric type, and the object of the invention is to provide a method for assisting the starting of such motor vehicles , to improve and balance the performance and convenience of the init...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34
CPCB60L1/00H02J7/34B60L58/20Y02T10/70B60L2240/547B60L2240/549B60L2210/10Y02T10/72F02N11/0866F02N2011/0888
Inventor D.维迪尔P.波查雷J.拉蔡泽
Owner VTESCO TECH GMBH