Control apparatus

Details Control apparatus Control apparatus

2006-12-05

2006-12-05

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090160, C123S090310, C464S160000

Reexamination Certificate

active

07143728

ABSTRACT:
A control apparatus that is capable of maintaining both the control resolution and the control accuracy at respective high levels even when at least one of the nonlinearity and the frequency characteristic of a controlled object varies. A control apparatus1that control a cam phase Cain by a phase control input Ucain includes two controllers102and103. The two-degree-of-freedom response-specifying controller102calculates a follow-up control input Rsld as a value for causing the cam phase to follow a target cam phase Cain_camd. The DSM controller103calculates a phase control input Ucain by modulating the follow-up control input Rsld, and in the calculation, the repetition period at which the phase control input Ucain is calculated is selected from two repetition periods ΔT1and ΔT2according to engine speed NE, a cam phase Cain, and a valve lift Liftin.

REFERENCES:
patent: 6761138 (2004-07-01), Takahashi et al.
patent: 6834627 (2004-12-01), Hiraku et al.

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