Title:
APPARATUS FOR CONTROLLING TIMING OF OPENING OF VALVE IN INTERNAL-COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JPS60201019
Kind Code:
A
Abstract:
PURPOSE:To control the timing of opening of a valve, by interposing a hydraulic apparatus, whose power transmitting length is variable, between a rocker arm and a sucking and exhausting valve driving cam, and controlling the hydraulic apparatus by a computer. CONSTITUTION:A hydraulic apparatus 23 mainly consisting of a piston 24 and a hydraulic chamber 26 is interposed between a cam 22 for driving a suction and exhaust valve 4 and a rocker arm 20. By variably controlling the power transmitting length of the hydraulic apparatus 23, the lift and the time of the opening of the suction and exhaust valve 4 are controlled. The control of the power transmitting length is performed by comparing the position signal of the piston 24 with the output signal from the computer 16 into which engine operation conditions such as the rotational frequency of the engine, the opening of the throttle valve, the angle of the crank, etc. are inputted so that a hydraulic change-over apparatus 29 is controlled thereby setting the piston 24 at the target position. Thus, the timing of the opening of the valve and the lift suitable for the engine operation conditions can be controlled precisely.
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Inventors:
NISHIMURA YUTAKA
OOYAMA NOBUSHIGE
OOYAMA NOBUSHIGE
Application Number:
JP5607984A
Publication Date:
October 11, 1985
Filing Date:
March 26, 1984
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01L1/24; F01L13/00; F02D13/02; (IPC1-7): F01L13/00; F01L1/24
Attorney, Agent or Firm:
Akio Takahashi