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Variable valve timing control apparatus

A technology of opening and closing period and control device, which is applied in the direction of valve device, valve operation/release device, valve details, etc., can solve the problems of not being in the middle lock phase, misoperation, etc., and achieve the effect of simple structure

Inactive Publication Date: 2015-03-18
AISIN SEIKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a detection error occurs, the engine control circuit determines that the relative rotation is at the middle lock phase even though the relative rotation is not actually at the middle lock phase, and performs a lock confirmation operation, or although the relative rotation is actually at the middle lock phase, the engine control circuit It is also judged that the relative rotation is not in the middle lock phase, and reverses the change direction of the actual camshaft phase, for example, which may cause misoperation

Method used

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  • Variable valve timing control apparatus
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  • Variable valve timing control apparatus

Examples

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Embodiment Construction

[0035] Embodiments of the present invention will be described with reference to the drawings. Such as figure 1 and figure 2 As shown, the internal combustion engine control system is configured to include: an engine control unit (ECU) 40 for controlling an engine 60 serving as an internal combustion engine; device 10.

[0036] figure 1 The illustrated engine 60 is mounted to, for example, a passenger car, and the engine 60 includes: a starter motor 55 that transmits driving rotational force to the crankshaft 1; a fuel control device 5 that controls injection of fuel with respect to an intake port or a combustion chamber; an ignition control device 6 for ignition; a crank angle sensor 1 a for detecting the rotation angle and rotation speed of the crankshaft 1 ; and a cam angle sensor 3 a for detecting the rotation angle of the camshaft 3 .

[0037] ECU 40 includes an engine control unit 41 and a phase control unit 42 serving as a control unit. The engine control unit 41 e...

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PUM

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Abstract

A variable valve timing control apparatus includes a driving-side rotation member, a driven-side rotation member, an intermediate lock mechanism including first and second lock members, first and second recess portions, and a guide groove, a sensor, and a control portion. The control portion performs a control so that the relative rotation phase is changed until a first stop state is established in a state where the relative rotation phase is in an unlocked state and one of the first and second lock members is positioned relative to one of the first and second recess portions at which the guide groove is formed at a side opposite from a side where the guide groove is formed. The control portion reverses a change direction of the relative rotation phase after the first stop state is established so that the relative rotation phase is changed until a second stop state is established.

Description

technical field [0001] The present invention generally relates to a valve opening and closing period control device. Background technique [0002] A known valve opening and closing timing control device that controls a relative rotational phase of a driven side rotating member with respect to a driving side rotating member that rotates synchronously with a crankshaft of an internal combustion engine, which can vary intake valves and exhaust valves in accordance with operating conditions of the internal combustion engine The opening and closing periods of the valve. Such a valve opening and closing timing control device includes a mechanism for changing the opening accompanying the rotation of the driven side rotating member by changing the relative rotational phase of the driven side rotating member with respect to the driving side rotating member rotated by the operation of the engine. and closed intake and exhaust valves for opening and closing periods. [0003] In gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/344
CPCF01L1/3442F01L2001/34473F01L2001/34463F01L2800/03F01L2001/3443F01L2800/01F01L2820/041F01L2001/34466F01L2250/02F01L2001/34483F16K31/48F01L2001/0476F01L2800/00
Inventor 小林昌树
Owner AISIN SEIKI KK
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