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Method for restarting internal combustion engine in hybrid drivetrain

A technology of internal combustion engine and hybrid power, which is applied to the layout of multiple different prime movers of general power plants, hybrid vehicles, power plants, etc., and can solve problems such as inaccuracy and different drivers

Pending Publication Date: 2020-12-18
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the torque is very imprecise, it will cause the driver to feel different when restarting

Method used

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  • Method for restarting internal combustion engine in hybrid drivetrain
  • Method for restarting internal combustion engine in hybrid drivetrain
  • Method for restarting internal combustion engine in hybrid drivetrain

Examples

Experimental program
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Embodiment Construction

[0019]infigure 1 A schematic diagram of the hybrid vehicle powertrain system 1 is shown in. The powertrain system 1 includes an internal combustion engine 2 and an electric motor 3. Between the internal combustion engine 2 and the electric motor 3, the hybrid power separation clutch 4 is arranged directly behind the internal combustion engine 2. The internal combustion engine 2 and the hybrid separation clutch 4 are connected by a crankshaft 5. The motor 3 has a rotatable rotor 6 and a fixed stator 7. The output shaft 8 of the hybrid clutch 4 is connected to a transmission 9 which includes a coupling element not shown further, such as a second clutch or a torque converter, which is arranged between the electric motor 3 and the transmission 9. The transmission 9 transmits the torque generated by the internal combustion engine 2 and / or the electric motor 3 to the driving wheels 10 of the hybrid vehicle. The electric motor 3 and the transmission 9 here constitute a transmission system ...

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PUM

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Abstract

The invention relates to a method for restarting an internal combustion engine in a hybrid drivetrain, in which a hybrid separating clutch (4) disconnects or connects the internal combustion engine (2) and an electric motor (3), wherein, during purely electrical drive and with the hybrid separating clutch (4) engaged, the internal combustion engine (2) is restarted by the electric motor (3) usinga predefined clutch torque (TTarget) from the hybrid separating clutch (4). In a method, in which the restart can be reliably achieved, the predefined clutch torque (TTarget) of the hybrid separatingclutch (4) on restart of the internal combustion engine (2) is modified as a function of at least one operating-specific and / or one environment-specific parameter.

Description

Technical field[0001]The present invention relates to a method for restarting an internal combustion engine in a hybrid powertrain system. In the method, a hybrid power separation clutch separates or connects the internal combustion engine and the electric motor, wherein, in pure electric driving and in hybrid power When the separating clutch is closed, the internal combustion engine will be restarted by the electric motor under the premise of using the specified clutch torque of the hybrid separating clutch.Background technique[0002]EP 2 193 060 B1 discloses a method for operating a powertrain system. In the method, in order to start an internal combustion engine by an electric motor in a hybrid powertrain system, the internal combustion engine and the internal combustion engine are controlled as follows: The closing and opening of the clutch between the motors means that the clutch is placed in a slip state by partial closing to start the internal combustion engine.[0003]It is kno...

Claims

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Application Information

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IPC IPC(8): B60W10/02B60W10/06B60W10/08B60K6/48B60W20/40
CPCB60K6/48B60W10/02B60W10/06B60W10/08B60W20/40B60W2050/0088B60W2510/0638B60W2510/0652B60W2710/027B60W2555/20Y02T10/62B60K2006/268B60Y2200/92Y04S10/126
Inventor 克里斯蒂安·韦伯
Owner SCHAEFFLER TECH AG & CO KG