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Controls for hybrid vehicles

A hybrid vehicle and control device technology, applied in hybrid vehicles, power devices, control devices, etc., can solve problems such as poisoning, covering rich air-fuel ratio, etc., and achieve the effects of suppressing deterioration, reducing load, and accelerating recovery

Active Publication Date: 2015-07-29
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the state where the catalyst and air (oxygen) are cut off continues, there is a problem that the noble metal contained in the catalyst is easily covered with reducing components such as HC and CO (so-called rich poisoning)

Method used

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  • Controls for hybrid vehicles
  • Controls for hybrid vehicles
  • Controls for hybrid vehicles

Examples

Experimental program
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Embodiment approach 1

[0035] [Configuration of Embodiment 1]

[0036] Below, refer to Figure 1 to Figure 8 Embodiment 1 of the present invention will be described. figure 1 It is a configuration diagram of an engine mounted in a hybrid vehicle in Embodiment 1 of the present invention. The system of the present embodiment includes an engine 10 as an internal combustion engine. In each cylinder of the engine 10 , a combustion chamber 14 is formed by a piston 12 . Piston 12 is connected to crankshaft 16 which is an output shaft of engine 10 . Further, the engine 10 includes an intake passage 18 for sucking intake air into a combustion chamber 14 (inside a cylinder) of each cylinder, and an exhaust passage 20 for discharging exhaust gas from the cylinders. The intake passage 18 is provided with an electronically controlled throttle valve 22 for increasing or decreasing the intake air amount. In addition, in the exhaust passage 20 , an upstream catalyst (SC) 24 and a downstream catalyst (UFC) 26 t...

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PUM

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Abstract

An object of this invention is to prevent rich poisoning of a catalyst utilizing a motor while an internal combustion engine is stopped in a hybrid vehicle. An engine 10 includes variable valve mechanisms 36 and 38 capable of causing an intake valve 32 and an exhaust valve 34 to stop. An ECU 50 estimates poisoning states of catalysts 24 and 26, and executes and prohibits stopping of the valves 32 and 34 based on the poisoning states. When stopping of the valves 32 and 34 is prohibited during a fuel-cut operation, the ECU 50 drives a crankshaft 16 of the engine 10 by means of a motor 60 to idle the engine 10. Thus, even in a hybrid vehicle in which the engine 10 is stopped during a fuel-cut operation, a sufficient amount of oxygen can be rapidly supplied to the catalysts 24 and 26 by utilizing a pumping action of pistons 12, and the catalysts 24 and 26 can be caused to recover from rich poisoning efficiently.

Description

technical field [0001] The present invention relates to a control device for a hybrid vehicle including an internal combustion engine and an electric motor, and more particularly to a control device for a hybrid vehicle including an internal combustion engine with a valve stop mechanism. Background technique [0002] As a prior art, for example, a control device for an internal combustion engine including a valve stop mechanism as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2001-182570 ) is known. In the prior art, the valve stop mechanism is operated to keep at least one of the intake valve and the exhaust valve in a closed state in a fuel-cut state. Accordingly, in the prior art, air (fresh air) passing through the combustion chamber is suppressed from being supplied to the catalyst in a fuel-cut state, thereby preventing deterioration of the catalyst due to contact with air. [0003] Among them, the applicant has mastered the documents described below a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/08B60K6/445B60W10/06B60W20/00B60L50/16
CPCB60W20/1082B60W10/06B60W20/00Y02T10/6286B60Y2300/525B60Y2300/46Y10S903/903Y02T10/6239B60W10/08Y02T10/54B60Y2300/64B60K6/445B60W20/16B60W2510/068B60W2530/12Y02T10/40Y02T10/62B60W2510/0604B60W20/15
Inventor 中川德久锦织贵志
Owner TOYOTA JIDOSHA KK
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