Internal combustion engine

Details Internal combustion engine Internal combustion engine

1986-01-21

1988-05-03

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

Camshaft drive means

123 9027, 123 9033, 474110, 474111, F01L 104

Patent

active

047412992

ABSTRACT:
An internal combustion engine includes an engine body having a chamber and an endless transmission member extended around and operatively engaged with a crankshaft and a cam shaft to transmit a rotation of the crankshaft to the cam shaft, the endless transmission member being movable along a closed path of travel in the chamber. A hollow mounting member is disposed in the chamber and has an upper open end and a lower tubular portion. The mounting member is fixed to the engine body through fastening elements secured to an upper portion of a peripheral wall of the mounting member. A tensioner device is disposed in the chamber and includes a tensioner member movably mounted on the engine body, and a hydraulic lock mechanism including a hollow cylinder and a plunger slidably received in the cylinder to define a hydraulic chamber in the cylinder. The cylinder is received in the hollow mounting member and snugly fitted in the lower tubular portion of the mounting member against movement. The mounting member and the cylinder defines an oil reservoir for holding oil therein, the hydraulic lock mechanism having passage through which the oil reservoir is in fluid communication with the hydraulic chamber. A check valve is connected to the passage for blocking it to prevent the plunger from moving in one direction along the cylinder. The plunger is movable in the other direction and operatively engaged with the tensioner member to hold it in sliding contact with the cam chain.

REFERENCES:
patent: 2191946 (1940-02-01), Weller
patent: 3599506 (1971-08-01), Freese
patent: 3964331 (1976-06-01), Oldfield
patent: 4480603 (1984-11-01), Tsuboi
patent: 4503681 (1985-07-01), Kurata et al.
patent: 4507103 (1985-03-01), Mittermeier
patent: 4553509 (1985-11-01), Mezger et al.

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