3results about "Valve camshafts" patented technology

A valve opening and closing timing control device includes a drive-side rotating body that rotates synchronously with a crankshaft of an internal combustion engine about a rotation axis, a driven-side rotating body that is disposed coaxially with the rotation axis and inside the drive-side rotating body, and rotates integrally with a camshaft for opening and closing a valve of the internal combustion engine, a phase adjustment mechanism that includes plural gears for reducing a driving rotational force of an electric motor and sets a relative rotational phase between the drive-side rotating body and the driven-side rotating body, a lubricating oil supply unit that supplies lubricating oil to the phase adjustment mechanism from outside, and an oil discharge control unit that performs oil discharge control of discharging lubricating oil by changing the relative rotational phase by driving the electric motor in accordance with stop control of stopping the internal combustion engine.

The present disclosure relates to an engine assembly for a vehicle. The engine assembly comprises an engine including a cylinder head and an engine block. The engine block comprises a cylinder block and a crankcase having a crankshaft. The engine may be used in different models of the vehicle having different characteristics by interchanging or replacing the cylinder head from a plurality of cylinder heads and / or a cylinder block from a plurality of cylinder blocks, while keeping one or more engine components such as the crankcase, a timing chain, or a valve cover the same. Accordingly, the engine is adaptable to different vehicles.

An oil supply apparatus includes a variable capacity oil pump 81, a hydraulic pressure detection section 50a detecting a hydraulic pressure in an oil supply passage 5, an oil control valve 84 changing an oil discharge amount, a mechanical relief valve 81z partially discharging oil to outside of the oil supply passage when a discharge hydraulic pressure of the oil pump exceeds an upper limit pressure, a temperature detection section 50b detecting a temperature of an engine, and a control section 60. When the temperature is equal to or higher than a set temperature, the oil control valve is subject to feedback control such that the hydraulic pressure matches a target hydraulic pressure. When the temperature is lower than the set temperature, the feedback control is prohibited, and the oil control valve is controlled such that an oil discharge amount becomes a maximum amount.