Abstract: A method for adjusting a valve clearance in a cylinder head using a rocker arm of a support point adjustable type. In the method, an adjustment screw is rotated in one direction until a camshaft comes in contact with a cam shaft contact section to make the amount of valve opening zero, then further rotated until the valve is released with a certain valve opening amount, and after that, rotated in a reverse direction by a certain rotation angle and accordingly loosened until a desired valve clearance value is obtained. In the process above, the method determines a first rotation angle of the adjustment screw necessary for the adjustment screw to move from a position where the valve is released with the certain valve opening amount to a position where the camshaft comes in contact with the camshaft contact section.

Abstract: The present invention provides a method and a device for accurately measuring and adjusting a valve clearance value to a desired value in an engine having a rocker-arm-type valve. According to a valve clearance measuring and adjusting method of the present invention, a pair of probes 60 each having a round tip end 611 are brought into direct contact with a valve clearance CV of an engine having a rocker-arm-type valve 105, and a center-to-center distance between the two tip ends 611 is measured. An actual valve clearance value is calculated and measured on the basis of the center-to-center distance between the tip ends 611. The actual valve clearance value is adjusted to a desired valve clearance value, while the actual valve clearance value is measured in real time.

Abstract: A method for adjusting a valve clearance in a cylinder head using a rocker arm of a support point adjustable type. In the method, an adjustment screw is rotated in one direction until a camshaft comes in contact with a cam shaft contact section to make the amount of valve opening zero, then further rotated until the valve is released with a certain valve opening amount, and after that, rotated in a reverse direction by a certain rotation angle and accordingly loosened until a desired valve clearance value is obtained. In the process above, the method determines a first rotation angle of the adjustment screw necessary for the adjustment screw to move from a position where the valve is released with the certain valve opening amount to a position where the camshaft comes in contact with the camshaft contact section.

Abstract: The present invention provides a method and a device for accurately measuring and adjusting a valve clearance value to a desired value in an engine having a rocker-arm-type valve. According to a valve clearance measuring and adjusting method of the present invention, a pair of probes 60 each having a round tip end 611 are brought into direct contact with a valve clearance CV of an engine having a rocker-arm-type valve 105, and a center-to-center distance between the two tip ends 611 is measured. An actual valve clearance value is calculated and measured on the basis of the center-to-center distance between the tip ends 611. The actual valve clearance value is adjusted to a desired valve clearance value, while the actual valve clearance value is measured in real time.