 | Home > Technical > Defender Hand Throttle for utility applications |
 
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16880   
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Which engine have you in mind?
I believe that factory fitted hand throttle options exist for both Td5 and TDCi engines, but I have never actually seen one and I am not aware of any aftermarket options. I am told that the factory option is blisteringly expensive - over £1200 for a TDCi. If anyone knows more I too would be interested to hear of it. Logic suggests that in the era of modern programmable ECUs it should be a very simple task, and I have always been a bit surprised that there's nothing available. |
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22nd Jan 2015 11:19am |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6037 
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For a lot of American 4x4's (Jeep etc), you can buy an OBD plug in module that increases the idle to whatever RPM for winching. I read a winching report and they named the make of it... I'll try to dig it out.
Would have thought it would be something that IRB/BAS could make a killing on. Td5's as well. Edit: Here's the unit... ProCal...<----- And for those interested in winches, an interesting back to back winch test of the popular makes and models, where I saw the ProCal device mentioned |
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22nd Jan 2015 12:31pm |
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| Lou Sparts Member Since: 15 Apr 2012 Location: Kent Posts: 1501 
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I'm sure something could be rigged up using a choke control cable to move the throttle pedal to increase the revs in these instances there's even a hole in the steering column cowling for such a thing (left over from the days when you could buy a Defender with a petrol engine). 2005 Td5 90 XS
Steve |
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22nd Jan 2015 12:39pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16880
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Navaras have a "fast idle" switch on the dash, ostensibly to speed warm up. The fast idle is automatically disengaged when a gear is selected.
It is a very simple system (at least if designed into the vehicle) and I have always felt it is a shame that Defenders don't have something similar. Thanks for the ProCal link, I will read that, it looks interesting.  |
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22nd Jan 2015 12:54pm |
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| uncas Member Since: 22 Nov 2012 Location: Wentworth near Rotherham Posts: 340
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For vehicles with fly by wire throttles you can't use a mechanical aid such as a cable. Phil Butler at Motor on services may have something for a Landrover but it wont be cheap,
Jeep owners used to use a thumb shifter for a mountain bike gear changer on the throttle to control the revs when off road. Some Toyotas had a hand throttle as standard to lift the idle speed at least my LJ70 did Uncas |
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22nd Jan 2015 12:55pm |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6037
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I've often thought about having a plug & socket off of a throttle pedal (Td5), and taking measurements of the resistance of the standard pedal when you're *just* pressing it down, so maybe 1000/1200rpm.
Get the socket, and the appropriate resistors to simulate the pedal at that desired position, and plug it in... wonder if it would work? |
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22nd Jan 2015 1:01pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5423 
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There is a box of tricks that is sometimes listed on the forums ebay, for this purpose, normally removed from electricity board or similar vehicle.
Andy |
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22nd Jan 2015 1:07pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16880
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See also this thread.
It seems a TD5 hand throttle could only be ordered on a new vehicle and in 2011 cost £1160.92 + VAT.  |
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22nd Jan 2015 1:47pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5743 
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Could you use a choke lever and cable from an earlier V8 and then attach the cable to the underside of the pedal so when pull the choke the pedal goes down? When in the normal position, the cable under the pedal will slack? 1999 Defender TD5 110
Regards John M0VAZ Econet Station 48 no clock |
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22nd Jan 2015 2:09pm |
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| 110MGD Member Since: 17 Oct 2013 Location: Wear Valley Posts: 153 
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Though not directly linked, sure I once saw a 110 Hi-Cap Td5, with a hand starter, like on a lawn mower, on the front wing.
The video was on YouTube. 2001 Td5 CSW (weekend and snow mobile) Plenty of lights, M/T tyres EGR delete, roofrack, swing away wheel carrier, snorkel. 2016 E220 CDI Night Edition Estate 2014 VW UP! 2x D3 and 1x D4 GONE |
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22nd Jan 2015 3:33pm |
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| Cupboard Member Since: 21 Mar 2014 Location: Suffolk Posts: 2971 
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the problem with just putting a replacement foot on the pedal as I see it is there's no governing at all, so if you load it up the revs will just drop. That might not be a problem, but if you're wanting a particular RPM for a generator it might be.
I don't know how governed the Puma Idle Jack is, but I'd had an idea in my head about making a fast idle button that just told the ECU you were in first low. |
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22nd Jan 2015 5:22pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16880
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Not that simple, I'm afraid, I've already thought along those lines. You'd have to tell the ECU that:
A) You were in the appropriate gear, B) the clutch was in, and possibly even C) the vehicle was moving, since movement or lack thereof seems to affect the IJ. If you could do this it would work quite well since on tickover, with or without Idle Jack, the engine is effectively governed by the anti-stall. The biggest problem with all this seems to be that the vehicle doesn't actually have any way of knowing what gear it is in except by the ECU detecting movement and cleverly figuring it out. For example, if you are stationary on a hill, in low box, in neutral on the main box, and the clutch is in, idle jack is not doing anything. If you release the brake and let the vehicle start to roll, then the tickover will increase as the movement is detected, if I recall correctly. So any effective aftermarket (or even factory) hand throttle really needs integrating properly into the control system. |
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22nd Jan 2015 6:40pm |
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| big steve Member Since: 24 Dec 2009 Location: hertfordshire Posts: 2456 
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Tbh on a TDCI all you would need is another throttle pedal even a td5 come to think of it
With another set of wires into the original run to where you want it and just modify the pedal to be a handle simples not hard at all Steve 2015 2.2 tdci hardtop xs 3.2 conversion DONE 238bhp and 707nm torque and thats just the start ;-P hybrid turbo in build -done ready to fit ashcroft atb in transfer box 6 speed auto in build |
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22nd Jan 2015 9:12pm |
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| uncas Member Since: 22 Nov 2012 Location: Wentworth near Rotherham Posts: 340
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Big Steve I don't think that it's as simple as that if it was you could couple up a cable to the existing throttle pedal.
Uncas |
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22nd Jan 2015 10:24pm |
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