Variable valve operation control apparatus

Details Variable valve operation control apparatus Variable valve operation control apparatus

1999-01-20

2000-05-16

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9018, 123 9031, 74568R, 464 2, F01L 1344, F01L 1300

Patent

active

060621834

ABSTRACT:
In a variable valve operation control apparatus, an exhaust camshaft and an intake camshaft are held non-movably and movably in the axial direction, respectively. The intake camshaft has a profile varying in the axial direction. A timing pulley and the exhaust camshaft are fixed by a bolt to drive the exhaust camshaft by a crankshaft. A vane rotor is fixed to the exhaust camshaft, while a shoe housing and a gear are held rotatably relative to the vane rotor. Torque gears are provided on the intake camshaft to rotate with the intake camshaft. The rotational phase of the intake camshaft relative to the crankshaft is adjusted by hydraulically varying the rotational phase of the shoe housing relative to the vane rotor.

REFERENCES:
patent: 4517936 (1985-05-01), Burgio di Aragona
patent: 4693214 (1987-09-01), Titolo
patent: 5080055 (1992-01-01), Komatsu et al.
patent: 5381764 (1995-01-01), Fukuma et al.
patent: 5765518 (1998-06-01), Nakano
patent: 5893345 (1999-04-01), Sugimoto et al.
patent: 5924397 (1999-07-01), Moriya et al.
A. Titolo, "The Variable Valve Timing System--Application on a V8 Engine", SAE 910009, 1991, pp. 8-15.

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