Mitsubishi Eclipse II technical information manual page 205

text version of content this owner's manual page from owners manual to the vehicle Mitsubishi Eclipse, year of production 1995 - 1999:

POWER TRAIN - Automatic Transaxle Solenoid Driver Logic Electronic solenoid valves connect the clutches to puter within the TCM is responsible for providing either a hydraulic source or a vent. Solenoid coils, ’ this modulation (pulsing) signal as well as an initial when energized, exert force on a push rod which d pull-in current pulse each time a solenoid is ener- in turn opens or closes a ball valve and/or vent. gized. To increase efficiency, the current through the sole- noid coil is pulse-width modulated. The microcom- Pulsing the Solenoids The Full ON pulse time is normally around 8 millisec- age of solenoid on-time is normally 38%. In third onds and provides rapid pull-in response time.Pull- in response time is dependent upon battery voltage. or fourth gear, the typical percentage is 30%. This The pull-in response time will increase with reduced is because less power is required to overcome the reduced hydraulic line pressure in third and fourth battery voltage to maintain pull in power. gear ranges. To protect against inadvertent drop-out of an ener-Current efficiency is maximized by the use of the gized solenoid, each ON solenoid is issued a re-inductive energy of the solenoid during the OFF portion of the cycle. fresher pulse every 50 milliseconds. The refresher pulse is used to prevent hydraulic pressure from The turn OFF command opens the circuit to provide for rapid drop-out response time. The circuit is moni- overcoming the solenoids strength. The frequency is increased during shifts and as certain faults starttored to permit checking the continuity of the sole- to occur. noid and its power return line. The hold-in duty cycle is also dependent on battery voltage as well as the in-gear condition. Thepercent- SOLENOID DRIVER LOGIC Solenoid control logic: ‘d FFJ Driver pulse logic: Ek- n J H-u-Ln Solenoid voltage: -+I Full on pulse W- Hold-in duty cycle +j VL 1 0 Inductive current flow-H I+ Inductive path opened --C + from ground Solenoid current: (1) provides rapid ON pull-in response time (2) reduces power level (3) refresh pulse - a periodic reissue of the FULL ON pulse to any energizedsolenlcid (4) provides for rapid OFF drop-out response time; inductive OFF voltage spike monitored to confirm circuit continuity d

owners manual Mitsubishi Eclipse

owners manual Mitsubishi Eclipse - year of production: 1995, 1996, 1997, 1998, 1999 - Mitsubishi Eclipse II technical information manual EN