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An engine start control device for a hybrid vehicle

A hybrid vehicle, hybrid technology, applied in hybrid vehicles, power units, control devices, etc., can solve problems such as shock and engine torque variation, and achieve the effect of avoiding the sense of disappearance, starting a small engine, and realizing shock.

Inactive Publication Date: 2007-04-11
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when the above-mentioned engine is started, engine torque fluctuations or torque changes associated with the engagement of the first clutch occur, and these torque changes are transmitted to the drive wheels as shocks.

Method used

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  • An engine start control device for a hybrid vehicle
  • An engine start control device for a hybrid vehicle
  • An engine start control device for a hybrid vehicle

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Embodiment Construction

[0046] Hereinafter, embodiments of the present invention will be described in detail based on the embodiments shown in the drawings.

[0047] Fig. 1 shows the power train of a front engine rear wheel drive vehicle (rear wheel drive type hybrid vehicle) having a hybrid drive device that can use the aforementioned engine start control device of the present invention, 1 is an engine, and 2 is a drive wheel (rear wheel).

[0048] In the power train of the hybrid vehicle shown in FIG. 1 , like a common rear-wheel drive vehicle, an automatic transmission 3 is arranged in series behind the engine 1 in the vehicle front-rear direction, and an electric motor / generator 5 is provided to communicate with the engine 1. A shaft 4 that transmits rotation from the engine 1 (crankshaft 1 a ) to an input shaft 3 a of the automatic transmission 3 is connected.

[0049]The motor / generator 5 is arranged between the engine 1 and the automatic transmission 3 because it is used as an electric motor ...

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Abstract

The present invention makes it possible to start the engine when switching from the electric driving (EV) mode to the hybrid (HEV) mode without feeling of torque loss and with low impact. At t1 when the EV→HEV mode switching request increases with the acceleration, the control is started using the mode 2301b, and the transmission torque capacity tTc1 of the first clutch for HEV is increased for driving force control. Before the second clutch for EV&HEV starts to slip, The PTO shaft of the engine is started to rotate by the drag of the first clutch. In the mode 2301b, the second clutch transmission torque capacity tTc2 is maintained at the maximum driving force evTmax in the EV mode. Switch to mode 2303 at t2 when the second clutch starts to slip, and determine tTc2 so that the second clutch slips and start the engine caused by the drag of the first clutch, and tTc1 is determined to maintain the increase in driving force and the stability of the second clutch slide.

Description

technical field [0001] The present invention relates to a hybrid vehicle capable of traveling using power from a motor / generator in addition to an engine, which has: an electric travel (EV) mode that travels using only power from the motor / generator; and a hybrid Driving (HEV) mode, which uses power from both the engine and the motor / generator, or from the engine, and in particular, the present invention relates to a device for driving while also driving in the former EV mode. When the engine output is required and the vehicle is switched to the latter HEV mode, the engine is started. Background technique [0002] As a hybrid drive device used in such a hybrid vehicle as described above, various forms have been proposed, and as one of them, a device described in Patent Document 1 is known. [0003] The structure of this hybrid drive device is that it has a motor / generator coupled with a shaft that transmits the rotation of the engine to the transmission, is provided between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/02B60W10/06B60W10/08B60W20/00B60L50/10B60K6/48B60K6/54B60L50/16F16D48/02
CPCY02T10/6286B60W10/06B60W2510/104B60W2510/1015B60W2710/025Y02T10/48B60K6/48B60W10/02B60K6/547B60L2240/486B60L2240/421B60W20/00B60W2710/105Y02T10/642B60W2510/081B60W2510/0638B60W10/08Y02T10/6221B60L2240/441Y02T10/40Y02T10/62Y02T10/64B60K2006/268F02N11/04F02N11/08B60W20/10B60W20/40
Inventor 城新一郎
Owner NISSAN MOTOR CO LTD
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