Patent ID: 9091188
Filing Date: 2015-07-28
Classification: F01M

Abstract:
1. A camshaft support structure for an internal combustion engine, comprising: a cylinder head having a valve gear chamber; a camshaft; a plurality of bearings provided in the valve gear chamber of the cylinder head and including a terminal bearing supporting the camshaft to be rotatable with respect to the cylinder head about a rotational axis, the terminal bearing being disposed at one end of the camshaft, the camshaft including a journal portion and a camshaft extending portion, the journal portion being supported on the terminal bearing, the camshaft extending portion projecting longitudinally outward from the journal portion along the rotational axis; an auxiliary machine drive cam provided on the camshaft extending portion that projects longitudinally outward from the journal portion along the rotational axis, the auxiliary machine drive cam including a first surface facing the terminal bearing in an axial direction along the rotational axis of the camshaft; an auxiliary machine having a plunger provided to be moved forward and backward by the auxiliary machine drive cam; a pulsar plate projecting from the camshaft in a radial direction of the camshaft and provided on an opposite side of the auxiliary machine drive cam with respect to the terminal bearing, the pulsar plate having a second surface facing the terminal bearing in the axial direction, each of the first surface and the second surface are provided in slidable contact with the terminal bearing; an auxiliary machine support housing coupled to the cylinder head to cover the camshaft extending portion, the auxiliary machine drive cam and the pulsar plate from above; and a rotation sensor configured to detect a rotation of the pulsar plate, wherein the auxiliary machine drive cam and the pulsar plate sandwich the terminal bearing to restrict movement of the camshaft in the axial direction along the rotational axis of the camshaft, wherein the auxiliary machine and the rotation sensor are coupled to the auxiliary machine support housing, and wherein a portion of an edge wall of the valve gear chamber expands outward such that the camshaft extending portion and the auxiliary machine drive cam are disposed inside the valve gear chamber adjacent to the portion of the edge wall that expands outward.