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Method and control unit for carrying out an engine stop of an internal combustion engine

A technology of control unit and internal combustion engine, applied in the direction of engine control, electrical control, control device, etc., can solve the problems of vibration and discomfort of internal combustion engine

Active Publication Date: 2020-07-10
宝马汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the stop of the internal combustion engine, vibrations of the internal combustion engine may occur, which may be uncomfortable for the user of the vehicle

Method used

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  • Method and control unit for carrying out an engine stop of an internal combustion engine
  • Method and control unit for carrying out an engine stop of an internal combustion engine
  • Method and control unit for carrying out an engine stop of an internal combustion engine

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Embodiment Construction

[0033] As stated at the outset, the invention relates to the reliable and comfortable setting of the rest position of a piston of an internal combustion engine of a vehicle in the event of a standstill. At the beginning of a shutdown, the supply of fuel to the internal combustion engine is typically stopped. The internal combustion engine can then be decelerated and / or braked until the shaft of the internal combustion engine comes to a standstill in a specific stop position. When the stop position is reached, the shutdown of the internal combustion engine is complete.

[0034] figure 1 Exemplary components of (the powertrain of) vehicle 100 are shown. Particularly, figure 1 Internal combustion engine (VM) 102 of vehicle 102 is shown coupled to transmission 106 via drive shaft 103 to apply torque to at least one axle or at least one wheel (not shown) of vehicle 100 . Vehicle 100 also includes at least one electric machine (EM) 105 that can be coupled to and decoupled from i...

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PUM

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Abstract

The invention relates to a control unit for a vehicle. The vehicle comprises an internal combustion engine having a shaft, which can be coupled to an electric machine or decoupled from the electric machine. The control unit is designed to couple the electric machine to the internal combustion engine during an engine stop of the internal combustion engine. The control unit is furthermore designed to cause the electric machine to guide the shaft of the internal combustion engine. In addition, the control unit is designed to determine that a speed of the guided shaft is equal to or less than a speed threshold value and, in response thereto, to decouple the electric machine from the internal combustion engine, such that the internal combustion engine stops without being guided by the electricmachine.

Description

technical field [0001] The invention relates to a method and a corresponding control unit for shutting down an internal combustion engine. Background technique [0002] In order to start the internal combustion engine (for example with direct injection) without a starter, at least one piston of the internal combustion engine is usually positioned in a specific rest position. The rest position can be defined such that the rest position of the piston together with the air in the corresponding cylinder achieves the greatest possible torque, in particular the maximum torque, during the subsequent starting combustion process. As a result, reliable starting is also possible without a starter. [0003] During stopping of the internal combustion engine, vibrations of the internal combustion engine may occur, which may be uncomfortable for a user of the vehicle. Contents of the invention [0004] The technical purpose of the invention is to enable precise setting of the stopping ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02N19/00F02N11/08F02N11/04F02N99/00F02N15/02
CPCF02N11/04F02N11/0855F02N15/022F02N19/005F02N99/002B60W2030/206F02N2019/008F02N2200/022F02N2200/041F02N2200/042F02N2300/102F02N2300/104B60K6/48B60K2006/4825B60K6/387B60W10/06B60W10/08B60W10/02B60W2510/0638B60W2710/081B60W2710/021B60W2710/0644B60W2710/0661B60W2510/0685B60W20/17B60W2710/023F02D41/042F02N11/0814
Inventor T·克里斯特D·施瓦茨巴赫
Owner 宝马汽车股份有限公司