| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus of controlling a solenoid valve of an automatic transmission for a vehicle which is capable of regularly controlling a plunger even though movement of a plunger appeared by physical characteristic of the solenoid valve is within irregular section. SOLUTION: The method contains fundamental over-excitation time calculation phase which calculates fundamental over-excitation time of a solenoid valve, target duty calculation phase which calculates target duty of the solenoid valve, correction conditional judgement phase which judges whether the desired duty is contained within the established duty or not, correction value counting phase of over-excitation time which calculates correction value of over-excitation time of the solenoid valve if the desired duty is contained within the desired duty established, target over-excitation time counting phase which calculates the target over-excitation time of the solenoid valve based on correction value of the over-excitation time and the fundamental over-excitation time, and correction phase of over-excitation time which drives the solenoid valve so that the desired over-excitation time can realize. COPYRIGHT: (C)2005,JPO&NCIPI |
