| 摘要 |
A system for optimizing the number of cylinders operating in a multicylinder engine, during ongoing engine operation. Input circuitry monitors conditions under which the engine is operating and generates corresponding input signals. Logic circuitry, based on such input signals, determines whether to then add to, subtract from, or maintain unchanged the number of cylinders operating in the engine. Output circuitry, responsive to the logic circuitry, enables and disables specific cylinders in the engine, in a preferred embodiment through valve selectors respectively provided on several cylinders of the multicylinder engine. The logic technique includes a bidirectional counting portion capable of sequential up and down counting through several steps to correspondingly sequentially enable or disable the valve selector equipped cylinders of the engine in, preferably, one cylinder steps. Preferred embodiments are directed to vehicle engines and the input circuitry preferably monitors operating parameters such as engine load, throttle position, transmission top gear selection, and engine or vehicle speed.
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