| 摘要 |
PURPOSE:To drive even a large injection device with low pressure oil in a fuel injection timing controller, by driving a set of different size eccentric cams with a slider, receiving pressure, representing an operational condition, through a ring-shaped piston and driving said slider with said ring-shaped piston. CONSTITUTION:Pressure oil from a pump 68 is changed by a pressure control valve 70 to pressure, in accordance with an injection timing control signal by an operational condition of a controller 72, to enter a pressure chamber 50 and displace a ring-shaped piston 46, and a slider 38 is expansibly opened against a spring by a sloped surface 461 of said piston and a slider sloped surface 381. This expansibly open sliding causes a relative rotary angle phase between a disc shaped rotary member 8 and hub 32 of a cam shaft 12. That is, sliding motion of the slider 38 causes a large eccentric cam 52, supported by a pin 56, further a small eccentric cam 54, supported by a pin 58, to turn about the cam 52 as the center, further the pin 58 is displaced about the cam 54 as the center to generate a rotary angle difference between the centers of the eccentic shaft pin 58 and the large eccentric cam 52. Accordingly, a crank angle position for the cam to be engaged to a plunger is changed in accordance with an operational condition to control injection timing. |
