| 摘要 |
PROBLEM TO BE SOLVED: To compatibly establish response and stability at a time of slow transient of a control device for a vehicle. SOLUTION: Since phase advance compensation element compensating intake air filling delay is included in a control system controlling throttle opening (cylinder filling air), a system becomes unstable without filters in the control system if noise overlaps input of the control system. Since the input of the control system includes various operation parameters influencing filling efficiencyη(engine rotation speed, valve timing and the like) other than target cylinder filling air quantity Mt, multiple filters are required and response is deteriorated if hunting factor of each input is filtered. In this invention, filters on an input side of the control system are omitted and a filter 49 is arranged outside of a closed loop between the phase advance compensation element and a control object (output side of the control system). Consequently, response and stability at a time of slow transient can be compatibly established. COPYRIGHT: (C)2007,JPO&INPIT
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