For ALS operation/config settings, see
- [VemsTune help]
- and/or old MembersPage/GaborRacz/NewAlsLaunchAndOthers page
Some installers use trunk-opener "throttle kicker" solenoids (often from VW vans), notably those with 10..30A supply current overheat if operated for longer than a few seconds (say >5 seconds each time, without a similarly long cooling period).
Eg an installed solenoid worked for years, with most rally drivers on most rally tracks,
- but overheated on a track where the driver drove with ALS throttle kicker solenoid almost continuously powered
- a simple PWM-ing circuit solved the problem, that kicks full voltage for appr 150..250 msec than applies PWM-ing for the remaining of the activation.
kicker of the throttle kicker solenoid
- ALS throttle kicker with powerful N-FET (0.003 Ohm <= Rdson <= 0.009 Ohm)
- external flyback applied to the throttle kicker (eg. 4, or min 3 BY399 in parallel). The common cathode must be connected to the +12V of the solenoid (the common anode to the NFET drain).
- NFET gate switched via 12V NE555 circuit and 6k8 series resistor
- stepper ALS throttle kicker output (stepper output is also 0/12V) and a simple dual diode and RC(=68k*10uF) circuit