Abstract:
A valve cover housing for internal combustion engines. In one embodiment, the valve cover housing includes a conduit for passing a coolant fluid near the valvetrain, and in another embodiment, the housing includes an internal protuberance or other structure that promotes the dripping of oil or another lubricant onto a selected region or component of the valvetrain, such as the valve springs.
Abstract:
A valve train with a hydraulic lifter in an engine, and a method of configuring a hydraulic lifter of an engine, are disclosed. The valve train includes a valve, a cam, and at lest one coupling component. The valve train further includes the hydraulic lifter, which has a nominal length and is coupled at least indirectly between the valve and the, cam by way of the at least one coupling component. The valve train additionally includes a mechanism for varying the nominal length of the hydraulic lifter so that the nominal length is substantially closer to a minimum length of the hydraulic lifter than to a maximum length of the hydraulic lifter.
Abstract:
A rocker lever assembly (12) for an internal combustion engine which employs four valves for each cylinder is provided. The rocker lever assembly includes a low cost support base (22) formed of a sintered metal configured to support and precisely position an intake and an exhaust rocker arm (20, 18) in axially offset relative positions to provide driving connections between the engine pushrods (14) and the cylinder valves.
Abstract:
Two support arms (28, 30) for a bearing support member (12) extend in opposite directions, each support arm having an overlying bearing cup (36) engageable with the rocker arm (10). Rolling members (34) within an annulus formed between the bearing support member and the bearing cups (36) provide free rotary oscillation of the rocker arm with respect to the bearing support member. At least one support arm has a crowned surface (66) such that radial load is distributed along the length of the rolling members when misalignement of elements of the rocker arm assembly occurs. A bearing assembly for mounting within a rocker arm is also disclosed.
Abstract:
PROBLEM TO BE SOLVED: To effectively suppress and reduce half-order inertial exciting force generated at an eccentric shaft, in a link type stroke variable engine for linking a piston, a crankshaft and the eccentric shaft via a link mechanism. SOLUTION: A counterweight part 64 which is in a projection view on a plane orthogonal to an axis of a rotary shaft 50 and has a center of gravity G1 arranged on an opposite side of an axis of the eccentric shaft 53 with respect to the axis of the rotary shaft 50 rotates together with the rotary shaft 50. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a valve train with a rocker arm like cam follower and a mechanical valve clearance adjusting device capable of avoiding a fault of conventional technique, capable of being manufactured at the low cost, and capable of achieving valve clearance adjustment within the framework of maintenance of the valve train at the low cost. SOLUTION: A ball 8 is inserted between a cutout 14 and a ball socket 15 replaceably as a valve clearance adjustment element 19, and the balls having different diameters are provided for valve clearance adjustment. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a valve system for an internal-combustion engine able to exert both the decompressing function and the exhaust gas circulating function. SOLUTION: The dynamic valve system of the internal-combustion engine is equipped with a decompression cam member 47 installed on a cam shaft 26 and moving between the working position C to move an exhaust tappet 27e in the valve opening direction in the compression stroke and the non-working position D to release the exhaust tappet 27e, an exhaust gas circulating cam member 48 installed on the cam shaft 26 and moving between a non-working position F to release the tappet 27e and a working position G capable of moving the tappet 27e in the valve opening direction while the engine is in the suction stroke, and a centrifugal mechanism 46 driven by the cam shaft 26 commonly working for moving the decompression cam member 47 to the working position C when the engine is in the start rotation area (a) and to the non-working position D after starting and also moving the cam member 48 to the non-working position F when the engine is in the low speed operating range (b) and to the working position G in the high speed operating range (c). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
A single-cylinder, four-stroke cycle, internal combustion engine arranged in an overhead valve configuration includes a first valve train and a second valve train. The first valve train includes a first cam on a camshaft, a first pushrod driven by the first cam, a first rocker arm attached to the first pushrod, and an exhaust valve driven by the first rocker arm. The second valve train includes a second cam on the camshaft, a second pushrod driven by the second cam, a second rocker arm attached to the second pushrod, and an intake valve driven by the second rocker arm. The first rocker arm is longer than the second rocker arm.
Abstract:
A valve cover housing for internal combustion engines. In one embodiment, the valve cover housing includes a conduit for passing a coolant fluid near the valvetrain, and in another embodiment, the housing includes an internal protuberance or other structure that promotes the dripping of oil or another lubricant onto a selected region or component of the valvetrain, such as the valve springs.
Abstract:
A valve train (460) in an internal combustion engine (100), and a method of adjusting the valve timing setting of a valve in such a valve train, are disclosed. The present invention relates to an engine that includes a crankcase (110) with a cylinder (160), a valve (250), a push rod (345), a rocker arm (355) supported by the crankcase and coupling the valve to the push rod, a cam (365) rotatably supported by the crankcase, and a cam follower arm (475) having first and second ends and, proximate the second end, having bottom (535) and top (545) surfaces. The cam follower arm is rotatably supported by the crankcase about a pivot point (515) proximate the first end. The bottom surface proximate the second end slidingly interfaces the cam, and the top surface proximate the second end interfaces the push rod.