Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1997-11-18
1999-07-20
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9017, 73116, 731173, F01L 1300, F01L 134, F02D 1302
Patent
active
059243970
ABSTRACT:
An apparatus for controlling valve performance in an engine is disclosed. A first detection blade helically extends on a camshaft. A pair of second detection blades are located on the camshaft and extend axially on the camshaft. An electromagnetic pickup is arranged to face the camshaft. The pickup produces a pulse in response to one of the blades passing by the pickup when the camshaft rotates. ECU computes the axial position of the camshaft based on the change in the time period from the pulse corresponding to the second blade to the pulse corresponding to the first blade.
REFERENCES:
patent: 4494506 (1985-01-01), Hayama et al.
patent: 4708101 (1987-11-01), Hara et al.
patent: 5611304 (1997-03-01), Shinojima
910009 The Variable Valve Timing System-Application on a V8 Engine, A. Titolo, Fiat Auto, 1991 Winner of the charles Deutsch Prize, pp. 8-15.
Hasegawa Tadao
Moriya Yoshihito
Sugimoto Kiyoshi
Lo Weilun
Toyota Jidosha & Kabushiki Kaisha
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