摘要:
An internal combustion engine is provided which comprises a variable valve timing mechanism provided at an end of a camshaft and actuated by oil pressure for varying a valve timing, an oil pressure control valve that controls the oil pressure, and an oil passage fluidly connecting between the oil pressure control valve and the variable valve timing mechanism, wherein the oil pressure control valve is installed on a head cover, and wherein the oil passage includes a first oil passage section formed in the camshaft and in communication with the variable valve timing mechanism, a second oil passage section formed in the head cover and in communication with the oil pressure control valve, and a third oil passage section formed in the cam bracket and provides communication between the first oil passage section and the second oil passage section.
摘要:
An improved arrangement for controlling the valve operation of an internal combustion engine wherein the control valves are mounted within perpendicularly extending bores formed in the cylinder head and camshaft bearing cap with the bores being deep enough so that the valves do not project significantly beyond the cylinder head. In addition, one or more of the connecting passages are formed by grooves in the mating surfaces of the cylinder head and bearing cap to avoid the necessity of drillings and particularly of drilling blind bores.
摘要:
Sprockets are fixed to ends of camshafts supported in a cylinder head via camshaft holders. A timing chain is wrapped around these sprockets. The relief oil from a hydraulic control value for controlling a variable valve operating characteristic mechanism passes through an oil passage formed in the plane in which the cylinder head and the camshaft holder are joined and flows out of an oil drain hole, thus lubricating the section where the sprocket is meshed with the timing chain. The section where the sprocket of the camshaft is meshed with the timing chain can thereby be lubricated reliably by a simple structure.
摘要:
An automotive engine arrangement 7 is provided having a VCT unit 96 wherein a lubrication oil restrictor 152 is incorporated with the VCT unit oil filter 127. The arrangement 7 of the present invention allows for VCT unit oil filter 127 to be installed in a cylinder head 18 of an automotive engine block 10 wherein placement of the VCT unit oil filter 127 in the appropriate location automatically installs the restrictor.
摘要:
The oil filter 23 is situated downstream of the oil control valve 4 while extending in the axial direction of the advance-angle side oil path. Therefore, any foreign matter existing between the control valve 4 and the actuator 3 is removed by the filter 23 to prevent foreign matter from becoming lodged in the oil control valve 4. This stabilizes the operation of the variable valve timing mechanism.
摘要:
An oil pressure control apparatus which includes a source of hydraulic pressure introducing the hydraulic pressure to a hydraulic actuator which is actuated by hydraulic pressure, a fluid passage which is connected between the source of hydraulic pressure and the hydraulic actuator for introducing and discharging hydraulic pressure from the source of hydraulic pressure to the actuator, a control valve which is disposed in the fluid passages for controlling the hydraulic pressure and a filter is disposed in a position that is between the actuator and the control valve. Thereby, the control valve is capable to be operated smoothly.
摘要:
A hub is secured to a camshaft for rotation synchronous with the camshaft, and a housing circumscribes the hub and is rotatable with the hub and the camshaft and is further oscillatable with respect to the hub and the camshaft within a predetermined angle of rotation. Driving vanes are radially disposed within the housing and cooperate with an external surface on the hub, while driven vanes are radially disposed in the hub and cooperate with an internal surface of the housing. A locking device, reactive to oil pressure, prevents relative motion between the housing and the hub. A controlling device controls the oscillation of the housing relative to the hub.
摘要:
A hub is secured to a camshaft for rotation synchronous with the camshaft, and a housing circumscribes the hub and is rotatable with the hub and the camshaft and is further oscillatable with respect to the hub and the camshaft within a predetennined angle of rotation. Driving vanes are radially disposed within the housing and cooperate with an external surface on the hub, while driven vanes are radially disposed in the hub and cooperate with an internal surface of the housing. A locking device, reactive to oil pressure, prevents relative motion between the housing and the hub. A controlling device controls the oscillation of the housing relative to the hub.
摘要:
In a valve lift control system for engine intake valves which selectively changes an intake valve lift of an engine, and a phase angle relationship of a timing of opening the engine valve in relation with a crankshaft angle depending on the operating condition of the engine, an arrangement is made to limit the advancing of the opening timing of the engine valve when a large valve lift is selected. It is thus possible to limit the advancing of the timing of opening the engine intake valve only when the valve lift is increased, and the advancing of the timing of opening the engine intake valve may cause an interference between the engine intake valve and the corresponding engine piston. The valve opening timing is otherwise optimized, and the maximum performance of the engine can be attained under all possible circumstances.
摘要:
A rod-shaped pipe filter for fluid lines having a fine-mesh pipe filter element, flowed through from inside to outside and providing a bypass function when the filter element is clogged, the fine-mesh pipe filter element, inserted by its inlet end into the fluid line in a known, sealed way, is arranged at a distance from the wall of the fluid line, is kept at a distance from the wall of the fluid line by means of reinforcing ribs with lug-shaped spacers, bears with its outlet end via a tapered surface against an offset of the fluid line and has here bypass openings which ensure a fluid overflow from the inner region to the outer region and to the branch to the unit to be supplied with fluid, even when the filter element is clogged.