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Valve timing control device for internal combustion engine

A technology of valve timing control and engine oil, which is applied to engine control, valve devices, mechanical equipment, etc., and can solve the problems of undisclosed supply of engine oil and difficulty in the release of lock pins

Inactive Publication Date: 2015-12-02
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, there is a possibility that the lock pin is difficult to come out of the recess.
Patent Document 1 does not disclose the technology of quickly supplying oil to the retard chamber connected to the through hole to quickly move the lock pin to the unlocked position, nor does it suggest anything.

Method used

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  • Valve timing control device for internal combustion engine
  • Valve timing control device for internal combustion engine
  • Valve timing control device for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] figure 1 Main parts of an internal combustion engine incorporating a valve timing control device according to an embodiment of the present invention are shown. This internal combustion engine 1 has a plurality of cylinders and is a known internal combustion engine mounted on a vehicle or the like as a power source for traveling. Although not shown, the internal combustion engine 1 includes a crankshaft and a camshaft. The crankshaft is connected to pistons inserted into the cylinders via connecting rods. A plurality of cams for driving opening and closing of intake valves provided in each cylinder are formed on the camshaft.

[0013] A phase changing mechanism 10 is provided at one end of the camshaft. figure 2 show figure 1 The section of the phase change mechanism 10 at the line II-II. Such as figure 1 As shown, the phase changing mechanism 10 includes: a vane rotor 11 as a first rotating body; and a casing 12 as a second rotating body, and the vane rotor 11 is...

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PUM

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Abstract

A valve timing control device includes: a vane rotor having a plurality of vanes; a housing having the vane rotor inside so that an advance chamber is formed on one side of each vane and a retard chamber is formed on the other side; a lock pin inserted in a cylinder provided in the vane and moves to a lock position and to an unlock position; and a feeding passage for feeding oil into the cylinder from the retard chamber adjacent to the vane provided with the cylinder to make the lock pin move to the unlock position, and controls an oil supplying unit to supply oil to each retard chamber, wherein a flow passage cross sectional area of the branch passage connected with the retard chamber linking with the cylinder is larger than a flow passage cross sectional area of the branch passage connected with the other retard chamber.

Description

technical field [0001] The present invention relates to a valve timing control device capable of controlling the opening and closing timing of at least one of an intake valve and an exhaust valve of an internal combustion engine. Background technique [0002] A variable valve timing device is known that controls the opening and closing timing of at least one of an intake valve and an exhaust valve by advancing or retarding the phase of a camshaft relative to a crankshaft of an internal combustion engine. For example, there is known a device that includes: a vane rotor that rotates integrally with a camshaft; and a housing that accommodates the vane rotor inside and rotates together with the crankshaft. The hydraulic pressure supplied to the advance chamber on one side of the vane of the rotor and the retard chamber provided on the other side of the vane is controlled to change the opening and closing timing. Among such devices, a device is known in which a check valve is pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/356
CPCF02D13/02F01L1/3442F01L2001/34423F01L2001/34453F01L2001/34473F01L2250/02F01L2800/01F02D13/0219
Inventor 金井弘
Owner TOYOTA JIDOSHA KK