US 2014/0182528 A1 · VARIABLE VALVE LIFT DEVICE AND VALVE APPARATUS FOR VEHICLE ENGINE USING THE SAME

Abstract

A variable valve lift device and a valve apparatus for a vehicle engine may include a valve configured to open/close a combustion chamber, a cam having a predetermined cam profile and rotatable by receiving a power generated in the combustion chamber, a cam side rocker arm rotatable by the cam, a rocker shaft penetratively mounted into the cam side rocker arm, a valve side rocker arm installed on the rocker shaft to apply a pressure for opening the valve while being turned by the cam side rocker arm, a hydraulic interval adjustment device installed in the cam side rocker arm to adjust an interval between the cam side rocker arm and the valve side rocker arm, and a hydraulic interval maintaining device configured to maintain the interval between the cam side rocker arm and the valve side rocker arm adjusted by the hydraulic interval adjustment device.

Claims17

Dependent claims

A variable valve lift device comprising:

a first rocker arm coupled to a turning center shaft and rotatable about the turning center shaft;
a second rocker arm coupled to the turning center shaft and rotatable about the turning center shaft;
a hydraulic interval adjustment device installed in the first rocker arm to adjust an interval between the first and second rocker arms;
and
a hydraulic interval maintaining device configured to maintain the interval between the first and second rocker arms adjusted by the hydraulic interval adjustment device.

2 more elements

A valve apparatus for a vehicle engine, comprising:

a valve configured to open and close a combustion chamber;
a cam having a predetermined cam profile and configured to be rotated by receiving a power generated in the combustion chamber;
a cam side rocker arm installed to be turned by receiving a rotational motion from the cam;
a rocker shaft penetratively mounted into the cam side rocker arm;
a valve side rocker arm installed on the rocker shaft to apply a pressure for opening the valve while being turned by receiving a turning motion force from the cam side rocker arm;
a hydraulic interval adjustment device installed in the cam side rocker arm to adjust an interval between the cam side rocker arm and the valve side rocker arm;
and
a hydraulic interval maintaining device configured to maintain the interval between the cam side rocker arm and the valve side rocker arm adjusted by the hydraulic interval adjustment device.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/089,008Filed 25 Nov 2013

Priority

KR 10-2012-015750328 Dec 2012

Published

3 Jul 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

F01L 1/181
Rocking arms or levers: centre pivot rocking arms
F01L 1/267
Characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with…
F01L 13/0015
Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations: for optimising…
F01L 2001/186
Rocking arms or levers: split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these…

Variable valve lift device and valve apparatus for vehicle engine using the same

Life of this patent

Variable valve lift device and valve apparatus for vehicle engine using the same

Life of this patent

Abstract

Claims17