Installation structure of the oil control valve

Abstract

To suppress heat damage relative to an oil control valve.SOLUTION: In an engine (20) that has a cylinder head cover (24) provided on a cylinder head (23) and that is mounted with a variable valve gear for changing a valve opening / closing timing by using hydraulic pressure, the hydraulic pressure to the variable valve gear is controlled by an oil control valve (60). In an installation structure for the oil control valve, a first slant face (95) inclined upwardly from a front end to the rear side and a second slant face (96) inclined downwardly from a rear end of the first slant face to the rear side are formed on an upper face of the cylinder head cover. A radiator (80) is installed in front of the cylinder head cover, and the oil control valve is installed on the second slant face.SELECTED DRAWING: Figure 6

Claims

1. An engine mounted on a saddle-type vehicle, wherein a cylinder head cover is provided on the cylinder head, a variable valve timing device that changes the opening and closing timing of valves by hydraulic pressure is mounted, and an oil control valve is installed to control the hydraulic pressure to the variable valve timing device, The upper surface of the cylinder head cover is formed with a first slope that inclines upward toward the rear of the vehicle from the front end, and a second slope that inclines downward toward the rear of the vehicle from the rear end of the first slope. An oil control valve installation structure characterized in that a radiator is installed in front of the cylinder head cover of the vehicle, and the oil control valve is installed on the second inclined surface such that the central axis of the oil control valve faces in the vehicle width direction.

2. The valve case of the secondary air reed valve that supplies secondary air to the exhaust system of the engine bulges upward from the first slope, and a valve cover is attached to the valve case. The installation structure for an oil control valve according to claim 1, characterized in that a part of the valve cover overlaps the oil control valve in the front-rear direction of the vehicle.

3. The cylinder head is suspended from the vehicle frame. The vehicle frame has a down tube that extends downward from the head pipe through the space between the radiator and the engine, and the down tube overlaps the oil control valve in the front-rear direction of the vehicle, characterized in that the oil control valve installation structure according to claim 1 or 2.

4. The aforementioned engine has multiple cylinders, The oil control valve installation structure according to claim 1 or 2, characterized in that the oil control valve is located in the center of the cylinder head cover in the vehicle width direction between adjacent cylinders.

5. A cooling fan is provided on the rear surface of the radiator. The oil control valve comprises a valve section that controls the flow of oil and a solenoid section that acts on the valve section. The oil control valve installation structure according to claim 1 or 2, characterized in that the cooling fan is located on one side in the vehicle width direction and the solenoid portion is located on the other side in the vehicle width direction.

6. The oil control valve is supplied with oil from the engine's crankcase through an oil pipe. The installation structure for an oil control valve according to claim 1 or 2, characterized in that one end of the oil pipe is connected to the front of the crankcase, the other end of the oil pipe is connected to the lower part of the oil control valve, and below the radiator, the oil pipe passes outside the cylinder head in the vehicle width direction in the vehicle front-rear direction.

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