##  ##  
 ##  ##  
 ##  ##  
 ##  ##  
  #####  
         

         
 ######  
## ## ## 
## ## ## 
## ## ## 
## ## ## 
## ## ## 
         

   ###   
  ## ##  
  ##     
 ####    
  ##     
  ##     
 ####    
         

   ___  
  / _ \ 
 | | | |
 | |_| |
  \__\_\
        

 _______ 
(  ___  )
| (   ) |
| |   | |
| |   | |
| | /\| |
| (_\ \ |
(____\/_)
         

IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now.


Visit Preferences to set your user name
Summary of change:
For ALS operation/config settings, see * [http://vems.hu/vt/help 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). * '''Powerful N-FET''' (eg. IRFB3306PBF N-POWERFET 60V 160A 230W 0,0033R TO-220) ** '''with heatsink''' (make sure the cooling is isolated from GND, since the body of the FET is connected to drain, which is switching to >12V ). Plastic screw, "mica" (or other heat-conducting) insulation behind the FET, and black anodized heatsink is best * '''NFET gate PWM-ed via 12V [https://shop.vems.hu/catalog/ne555pulsesignalgen-p-214.html NE555 circuit] and 6k8 series resistor''' (Lezsi, what freq did you set the NE555 to ? 200 Hz ?) * stepper ALS throttle kicker output (stepper output is also 0/12V) and a simple dual diode and RC(=68k*10uF) circuit ** 20uF (2 x 10 uF in parallel) can be used for longer (than 100msec) powerup-kick circuit: http://vems.hu/download/stepper-valve/ALS_ThrottleKickerSolenoidKicker/VEMS_ALS_ThrottleKickerSolenoidKicker.schematic.png
Optional: Add document to category:
Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.