Transmission load indicator
Submitted: Wednesday, Apr 21, 2010 at 17:56
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Member - Paul S (VIC)
Can anyone suggest a method of measuring the load on the manual transmission of my 3 litre TD hilux during towing?
It crossed my mind to fit a boost gauge to the inlet manifold, but feel without a very large gauge the reading may be too coarse to accurately assess load.
Is it a possibility to tap into the drive-by-wire current, or does that only give me throttle position?
Exhaust heat sensor could be another, but probably slow to respond.
Any thoughts folks?
Paul
Reply By: Bob of KAOS - Thursday, Apr 22, 2010 at 08:40
Thursday, Apr 22, 2010 at 08:40
Paul
Although an indirect measure, the percent throttle opening value gives a pretty good indication of whats going on. For instance, with cruise control engaged, the throttle opening varies to maintain a constant speed - I measure the effect of turning the LPG system on and off.
So throttle position is not a bad proxy for torque (or transmission load).
Alternatively, the instantaneous fuel consumption in L per hour, or L per 100 km also give an approximation to torque.
All of the above are easily measured by plugging a Scangauge into the OBDII outlet
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Follow Up By: Member - Paul S (VIC) - Thursday, Apr 22, 2010 at 10:27
Thursday, Apr 22, 2010 at 10:27
That's a great suggestion Bob..........the solution may already exist on my dash as I can scroll to the 'inst. L/100kms' readout instead of having it set at 'outside temp'.
Will do some testing with & without towing the camper.
A L/100kms readout obtained from normal 5th gear non towing, such as slight inclines at 110kms/hr, could be used as my max for towing.
My thanks to you Bob and to all forumites who offered advise & suggestions .
Cheers,
Paul
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