Abstract: Valve train apparatus for an internal combustion engine having two poppet-type intake valves per cylinder. The valve train include a generally conventional rocker arm actuated either by a pushrod or an overhead camshaft. One end of the rocker arm actuates a first intake valve. A second rocker arm is pivotally mounted at one end to the cylinder head and contacts the first intake valve at its opposite end. An intermediate location on the second rocker arm contacts a second intake valve. The first intake valve engages a flanged element at the end of the valve stem opposite the valve head. The first rocker arm contacts the the top surface of the flanged element while the second rocker arm contacts a bottom surface of the flanged element. This construction permits flexibility in the positioning of the second valve. The second intake valve and its valve train apparatus can be rotated in a plane about the axis of the first intake valve to obtain optimum positioning of the second intake valve.

Abstract: A resilient bumper assembly comprising an outer cover, an inner energy absorbing member and a rigid backing member. The front cover is made of an elastic material of low durometer and high elongation capability. The inner energy absorbing member is made of an elastomeric material of a higher durometer. The energy absorbing member has a preformed bellows shape constructed to concentrate bending at predetermined locations.

Abstract: An intake manifold for an internal combustion engine having an integral exhaust gas recirculation system and an internally contained cooler for recirculated gases. The cooler comprises a heat exchanger which transfers heat from the recirculated exhaust gases to the engine coolant. The heat exchanger is frictionally and resiliently retained within a passage or chamber formed in the manifold casting.