Valve mechanism of internal combustion engine

Details Valve mechanism of internal combustion engine Valve mechanism of internal combustion engine

1985-07-10

1987-02-24

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9036, 123 9044, F01L 124

Patent

active

046449140

ABSTRACT:
A hydraulic valve lifter is held in the recess of the rocker arm swingably pivoted to the rocker shaft. An oil pressure chamber is formed between the lifter body and the plunger. An oil chamber to supply the oil to the oil pressure chamber is formed between the plunger and the recess. An oil supply path to supply the oil through the oil path of the rocker shaft communicates to the oil chamber. A return path is provided extending from the top of the oil chamber to a clearance between the inside of the rocker arm hole and the outside of the rocker shaft or to a clearance between the outside of the lifter body and the inside of the rocker arm recess. With this arrangement of the device, the air infiltrating the oil chamber can be discharged from the top of the oil chamber via the return path and the clearance, thereby preventing invasion of the air into the oil pressure chamber and ensuring normal functioning of the hydraulic valve lifter.

REFERENCES:
patent: 1792836 (1931-02-01), Handwerker
patent: 2011863 (1935-08-01), Lovett
patent: 2634714 (1953-04-01), Randol
patent: 3146767 (1964-09-01), Dadd
patent: 3179094 (1965-04-01), Ribeton
patent: 4192263 (1980-03-01), Kitagawa
patent: 4449491 (1984-05-01), Tsuchiyama et al.
patent: 4497307 (1985-02-01), Paar et al.
patent: 4523551 (1985-06-01), Anai et al.
patent: 4554895 (1985-11-01), Ono

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