| 摘要 |
FIELD: mechanical engineering; internal combustion engines. ^ SUBSTANCE: proposed device contains at least one timing gear intake valve with tappet, camshaft with two cams in contact with tappet and intake valve drive mechanical. Through axial hole is made in shaft, and blind axial hole, in tappet. Intake valve drive mechanism is made in form of bushing fitted in hole of shaft and yoke with tubular projection getting into hole of tappet installed with clearance on shaft between cams. Grooves are made under yoke along arc of outer surface of bushing and along arc of inner surface of yoke. Yoke groove is arranged symmetrically relative to yoke projection, and bushing groove communicates with inner space of bushing by means of radial channel. Through radial channel is made in section of shaft and hole on outer surface displaced from channel over circumference connected to inner longitudinal channel passing over periphery of shaft communicating with inlet channel of oil system arranged in engine housing. Bushing projects relative to shaft end face and is furnished with control lever, and its inner space is provided with outlet channel in which adjustable pressure valve in installed. Angle of arc of yoke groove and angle of arc between hole and radial channel of shaft are made similar within 120 and 130°. Tappet can be made in form of piston in contact with intake valve, in form of link with rocker, or in form of bell crank. Design of device provides reduction of fuel consumption. ^ EFFECT: reduced fuel consumption owing to provision of control of optimum amount of fresh charge for load. ^ 5 cl, 9 dwg |
