Cylinder head arrangement for variable valve actuation rocker arm assemblies
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A technology of rocker arm components and cylinder heads, which is applied to non-mechanically actuated valves, valve devices, cylinder heads, etc., can solve problems such as the impact of cylinder heads, and achieve the effect of reducing mass and moment of inertia and increasing stiffness
Active Publication Date: 2014-11-19
EATON INTELLIGENT POWER LTD
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However, major changes made to the cylinder head may have an impact on components made by other manufacturers that mate with the cylinder head
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[0215] Words used herein have their regular and ordinary meanings, unless redefined in this specification, in which case new definitions will supersede the ordinary meanings.
[0216] It is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. References to singular and plural forms are not intended to limit the disclosed systems or methods, their composition, behavior or elements. As used herein, "comprises," "including," "has," "comprising" and variations thereof mean that the things listed thereafter or equivalents thereof are included as well as other things. References to "or" are to be understood as inclusive, whereby any described phrase using "or" is read as singular, plural and all of the descriptive phrases. Any reference to front and back, left and right, up and down, high and low is for convenience of description and is not intended to limit the system or method or their composi...
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Abstract
A novel cylinder head arrangement is described for an in-line four cylinder or eight cylinder engine with each head having two end cylinders and two middle cylinders. A modified arrangement allows additional space for the installation of wider rocker arm assemblies used for variable valve lift (VVL), cylinder deactivation (CDA) and other types of variable valve actuation (VVA) in these existing cylinder head designs. In the first embodiment, cam towers of conventional designs adjacent the end two cylinders are not used. At least one end support is used which may be an outboard bearing on a camshaft for each end. The wider rocker assemblies may then be installed. In an alternative embodiment, the cam towers adjacent the inner two cylinders are eliminated and a single camshaft support piece with a support bearing is installed between the inner cylinders to provide support for the camshafts. The wider rocker assemblies may then be installed on at least one of the middle cylinders. The system also includes a novel oil control valve that operates latches in switching rocker arm assemblies.
Description
[0001] Cross References to Related Applications [0002] This application claims the benefit of the following U.S. Provisional Application: 61 / 812,707 (EATN-0111-P01), filed April 16, 2013, filed December 23, 2013, entitled "Cylinder Head Arrangement for Variable Valve Actuation Rocker Arm Assemblies," 61 / 920,297 (EATN-0110-P01) and 61 / 811,662 (EATN-0109-P01), filed April 12, 2013, entitled "Cylinder Head Arrangement for Variable Valve Actuation Rocker Arm Assemblies." This application is also a continuation-in-part ("CIP") of the following U.S. Patent Application and the following International Patent Application: U.S. Patent Application 14 / 028,337, filed September 16, 2013, entitled "Valvetrain Oil Control System and Oil Control Valve" (EATN-0001-U01-C01-C01), U.S. Patent Application 14 / 188,339 filed February 24, 2014 (EATN-0212-U01), U.S. Patent Application 13 / 868,068 filed April 22, 2013 (EATN -0210-U01), U.S. Patent Application 13 / 868,067 filed April 22, 2013 (EATN-0209-U0...
Claims
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