Patent ID: 9032923
Filing Date: 2015-05-19
Classification: F01L

Abstract:
1. An internal combustion engine with a variable valve device, comprising: the engine including cylinders each provided with a plurality of intake valves, a first camshaft and a second camshaft arranged coaxially with each other, the first camshaft being configured to drive cams for actuating some of the valves among said plurality of intake valves and the second camshaft being configured to drive cams for actuating other of the valves among said plurality of intake valves, a cam phase change mechanism arranged at one end of the first and second camshafts and capable of varying a phase difference between the first and second camshafts, a first detection unit that detects a rotational angle of the first camshaft; a second detection unit that detects a rotational angle of the second camshaft; and a cam sprocket arranged at an end of the first camshaft opposite the cam phase change mechanism, wherein the first and second detection units are arranged on an identical side of the engine with respect to an axial direction of the first and second camshafts, and the first and second detection units are arranged on a side opposite to the cam sprocket with respect to the axial direction of the first and second camshafts, wherein at least one of the first and second detection units detects the rotational angle of a rotating element constituting the cam phase change mechanism, and wherein operation of the cam phase change mechanism is controlled based on a phase difference between the first and second camshafts derived from detection results of the first and second detection units.