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Method for starting an internal combustion engine in a hybrid drive

A technology of hybrid drive and internal combustion engine, which is applied to the arrangement of multiple different prime movers of the general power plant, the traction driven by the engine, the power plant, etc., and can solve problems such as overheating, operation, and mechanical overload of the clutch

Inactive Publication Date: 2009-05-27
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of this is that a clutch operating in a slipping state between the vehicle transmission and the at least one electric drive cannot be operated in this slipping state for a long period of time. On the one hand, the The slipping state is necessary for the maintenance of continuous output speed, however, on the other hand, the slipping state will cause the mechanical overload or overheating of the clutch.

Method used

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  • Method for starting an internal combustion engine in a hybrid drive
  • Method for starting an internal combustion engine in a hybrid drive

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Embodiment Construction

[0016] The schematic diagram according to FIG. 1 shows the components of a hybrid drive with an internal combustion engine, at least one electric drive, a clutch arranged between them, and a connection between the at least one electric drive and the vehicle transmission. another clutch in between.

[0017] A drive train 10 of a motor vehicle equipped with a hybrid drive 12 includes an internal combustion engine 14 . The internal combustion engine 14 can be coupled by means of the first clutch 16 to at least one electric drive 20 , which is another component of the hybrid drive 12 shown in FIG. 1 . The output shaft 22 of the at least one electric drive 20 can be coupled to the vehicle transmission 26 via a further clutch, namely a second clutch 24 . In the embodiment variant of the hybrid drive 12 shown in FIG. 1 , the internal combustion engine 14 can be started from the “electric drive” operating mode. This is usually done by means of pulse starting. Here, the turning puls...

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Abstract

The invention relates to a method for starting an internal combustion engine (14) of a hybrid drive (12) comprising at least one electric drive (20). This can be coupled to the internal combustion engine (14) via a first clutch (16) for pulsed starting of the internal combustion engine. A rotational speed change (34, 36) in the at least one electric drive (20), which change occurs during pulsed starting of the internal combustion engine (14), is compensated for by continuous changes (42, 44) in the transmission ratio in a vehicle gearbox (26).

Description

Background technique [0001] A drive train for a motor vehicle is known from document EP1 173 674 B1. The drivetrain includes an internal combustion engine equipped with an electric machine that produces torque when the internal combustion engine is started. A clutch is provided between the internal combustion engine and the transmission, via which the torque generated by the internal combustion engine is transmitted to at least one vehicle drive wheel. Means are provided which actuate the clutch when the internal combustion engine is started in such a way that a first part of the torque generated by the electric machine when the internal combustion engine is started is transmitted to the at least one vehicle drive wheel, and A second portion of the torque produced by the electric machine sufficient to start the internal combustion engine is then transmitted to the internal combustion engine. Taking into account temperature- and / or rotational-speed-dependent characteristic di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/00B60K6/48B60W10/06B60W10/08B60W10/10F02N99/00B60L50/16
CPCB60W20/00Y02T10/6286B60Y2300/50B60W10/06B60K6/48B60W10/02B60W10/11B60K6/547B60W10/08Y02T10/6221B60L15/2054B60L2240/443B60L2240/486Y02T10/72B60L50/16Y02T10/62Y02T10/64Y02T10/7072B60K2006/268B60W30/18027F02N11/00B60W20/30B60W2510/084B60W2510/1005B60W10/10Y02T10/70
Inventor A·西尔
Owner ROBERT BOSCH GMBH
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