| 摘要 |
A system is provided for controlling an internal combustion engine (10) and detecting combustion quality such as knock. A knock sensor (22) senses knock in the engine. A memory (25) and a calculation device (26) establish a base value for an engine control input, such as spark advance in a spark ignition engine. A generator (30) periodically perturbs the control input about the base value. A calculation device (31) determines a combustion quality value by calculating the slip of the output of the sensor (22) with respect to the control input. Means (36-39) may be provided for updating a correction schedule for the control input. Such a system may also be used for engine roughness with the engine control input being air/fuel ratio. |
