Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1998-09-14
2000-08-29
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9017, F01L 134
Patent
active
06109224&
ABSTRACT:
An ECU calculates an actual relative rotational angle in a VVT based on a crank angle signal sent from a crank position sensor and a cam angle signal sent from a cam position sensor. Furthermore, the ECU calculates a fundamental target relative rotational angle based on engine operating conditions. The fundamental target relative rotational angle is corrected by a factor responsive to the change of the air-fuel ratio. Thus, a control rotational angle fed to the VVT varies in accordance with the change of the air-fuel ratio so as to stabilize the combustion and improve the power output characteristics.
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patent: 5713317 (1998-02-01), Yoshioka
Isobe Daiji
Morikawa Junya
Denso Corporation
Lo Weilun
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