Engine start control device for hybrid vehicle

A technology for hybrid vehicles and starting control devices, which is applied to hybrid vehicles, control devices, motor vehicles, etc., and can solve problems such as stalling and driver discomfort

Active Publication Date: 2018-06-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, for example, when switching from the D range (forward range) to the L range (first-speed fixed gear) in the EV driving state, it is necessary to start the engine and perform engine braking to generate sufficient deceleration, and after the engine is started, the , when re-engaging the temporarily disengaged clutch to perform engine braking, if the engine speed is too low, there is a possibility of stalling. On the contrary, if the engine speed is too high, sufficient engine braking cannot be performed, and there is a possibility of deceleration against the expected speed. Possibility of uncomfortable driver

Method used

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  • Engine start control device for hybrid vehicle
  • Engine start control device for hybrid vehicle
  • Engine start control device for hybrid vehicle

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Embodiment Construction

[0023] Below, according to Figure 1 ~ Figure 4 Embodiments of the present invention will be described.

[0024] Such as figure 1 As shown, the dual-clutch transmission T using the engine E and the motor / generator MG as the drive source has a first input shaft 11, a second input shaft 12, an output shaft 13, an idler shaft 14, and a return shaft arranged in parallel. 15. The first clutch C1 and the second clutch C2 composed of friction clutches are arranged in series on the axis of the first input shaft 11. When the first clutch C1 is engaged, the crankshaft 16 of the engine E is combined with the first input shaft 11, and the When the second clutch C2 is engaged, the crankshaft 16 is connected to the idler drive gear 17 relatively rotatably supported by the first input shaft 11 . The idler drive gear 17 meshes with a first idler driven gear 18 fixed to the idle shaft 14 , and the first idler driven gear 18 meshes with a second idler driven gear 19 fixedly mounted on the se...

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Abstract

An engine start control device for a hybrid vehicle is provided. When the engine is started during deceleration in the EV running state, appropriate engine braking can be performed without stalling the engine. When the driver's intention to decelerate is detected while the engine is stopped and the motor / generator is used, the clutch is engaged to start the engine, and then the clutch is released. At this time, when the engine rotation speed after starting is lower than the reference rotation speed, which is the input shaft rotation speed realized by the driving force reversely transmitted from the drive wheels, the engine rotation speed is increased toward a target rotation speed lower than the reference rotation speed, and the engine rotation speed reaches the target rotation speed. Reduce the output of the engine when the speed is high, and re-engage the clutch, so the engine speed can be increased to avoid the situation that the engine speed is too low after starting and the engine stalls due to the start of engine braking, and the clutch can be re-engaged as soon as possible. The engine brake of the engine produces the deceleration feeling that the driver expects.

Description

technical field [0001] The present invention relates to an engine start control device of a hybrid vehicle, an input shaft of a transmission of which a driving force of an engine is transmitted via a clutch and a driving force of a motor / generator is transmitted to the input shaft of the hybrid vehicle. Background technique [0002] Patent Document 1 below discloses a hybrid vehicle in which an engine and a motor / generator are connected to an input shaft of a dual-clutch transmission, and is decelerated while traveling in an EV running state using only the driving force of the motor / generator. While starting the engine, while changing the degree of engagement of the clutch provided between the input shaft and the engine, the engine is turned by the driving force reversely transmitted from the input shaft to start it. [0003] prior art literature [0004] patent documents [0005] Patent Document 1 [0006] Japanese Patent No. 5474980 [0007] However, for example, when ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B60W30/18B60W10/06B60W10/08B60W10/02
CPCB60W10/02B60W10/06B60W10/08B60W30/18136B60W2710/0644B60W20/40B60W30/1884B60W50/082B60W2510/0638B60W2510/1015B60W2510/109B60W2520/10B60W2540/10B60W2540/16B60W2540/165B60W2710/021B60W2710/0677Y02T10/62Y10S903/93
Inventor中西幸儿重长正人
OwnerHONDA MOTOR CO LTD