Hand throttle

[Blocky10]

I thought my truck done ok in Wales last weekend. Being an auto though, it's hard keeping a steady throttle when bouncing over things so was wondering if it is possible to fit some kind of hand operated throttle.
I know there's a throttle position sensor so wondered if I could use another and piggy back it having a variable switch on or near the dash. Would need a switch to arm/disarm too.
Crazy thoughts:nenau:lol

 

[rustic]

I thought my truck done ok in Wales last weekend. Being an auto though, it's hard keeping a steady throttle when bouncing over things so was wondering if it is possible to fit some kind of hand operated throttle.
I know there's a throttle position sensor so wondered if I could use another and piggy back it having a variable switch on or near the dash. Would need a switch to arm/disarm too.
Crazy thoughts:nenau:lol

Our 1995 Mav has a mechanically linked hand throttle, and as you say, it is a very handy piece of equipment to have, I use it when going down a steep ice and snow covered road, if you accidentally blipped the throttle on the decent, you could loose all traction.

Technically, yes it is possible electronically. You just need to simulate how the main throttle works.
Is there a switch in the normal throttle as well as a variable resistance?
Can anybody post a schematic of the assembly, including resistance values and a connection diagram.

Now, should you be doing this? Not sure under the construction and use act !
What you must do is limit the maximum revs, easy enough to do.
In my opinion, you will need a tamperproof switch to engage it, so it can't accidentally become engaged. Label it " for off road use only" might just cover it.

Mechanically, it might be a key switch say next to a knob that you rotate, maybe a knob with 0-10 on it, so you can select and use what is best.

Just one more knob in the car lol...:lol
How many others could be interested in this? Clearly only suitable for fly by wire throttles tdi's etc.
I recon Most of those on the Welsh weekend would like one lol...

Rustic

 

[macabethiel]

Hand throtle

You would need it to disengage like a cruise control does when you brake. Last vehicle I had with a hand throttle was an Alfa Giuletta GT circa 1968 it was on the right hand side of the dash like an old heater control lever but operated through a vertical plane!

It was in reality a fully manual cruise control but it was a panic to disengage when on the Motorway and traffic suddenly slowed. With having twin choke DCOE Webbers it was a heavy foot throttle !

 

[Blocky10]

Cheers Rustic :thumb2
I was thinking it only needs to be 1500rpm,2000 at the most. :nenau

 

[Blocky10]

You would need it to disengage like a cruise control does when you brake. Last vehicle I had with a hand throttle was an Alfa Giuletta GT circa 1968 it was on the right hand side of the dash like an old heater control lever but operated through a vertical plane!

It was in reality a fully manual cruise control but it was a panic to disengage when on the Motorway and traffic suddenly slowed. With having twin choke DCOE Webbers it was a heavy foot throttle !

The last vehicle I drove with a hand throttle was a series 2 lr:lol

 

[rustic]

Cheers Rustic :thumb2
I was thinking it only needs to be 1500rpm,2000 at the most. :nenau

I agree with that, about the limit on the mav hand throttle.
Of course my suggestion would only be like holding the foot throttle in a certain position, so say 5 on the knob would not maintain say 1500 revs no matter what gear you were in, or whether you were ascending or descending.

You will have to move your knob to suit the conditions to hold your speed. But no different to my mav hand throttle. So if it's ok for that...

Also handy if you are jump starting another vehicle or want a quick warm up, some extra revs ...

The fixed knob hand throttle may not be suitable for all off road conditions, eg mud, if traction is lost, the revs would go up and cause more slippage... looking for a knob and adjusting it, will not be as effective as taking your foot off the throttle.:augie
So caution required in it's use.

Rustic

 

[emjaybee]

Our 1995 Mav has a mechanically linked hand throttle, and as you say, it is a very handy piece of equipment to have, I use it when going down a steep ice and snow covered road, if you accidentally blipped the throttle on the decent, you could loose all traction.

Technically, yes it is possible electronically. You just need to simulate how the main throttle works.
Is there a switch in the normal throttle as well as a variable resistance?
Can anybody post a schematic of the assembly, including resistance values and a connection diagram.

Now, should you be doing this? Not sure under the construction and use act !
What you must do is limit the maximum revs, easy enough to do.
In my opinion, you will need a tamperproof switch to engage it, so it can't accidentally become engaged. Label it " for off road use only" might just cover it.

Mechanically, it might be a key switch say next to a knob that you rotate, maybe a knob with 0-10 on it, so you can select and use what is best.

Just one more knob in the car lol...:lol
How many others could be interested in this? Clearly only suitable for fly by wire throttles tdi's etc.
I recon Most of those on the Welsh weekend would like one lol...

Rustic

Oh gawd!



Don't tell Banshee, he'll spend the next three weeks scouring the Internet for a knob that goes up to 11!

:augie

 

[rustic]

The last vehicle I drove with a hand throttle was a series 2 lr:lol

On the early LR's they had hand throttles in case you were using power take off, a seperate propshaft that connected to the transfer box, to drive a belt for a thrashing machines, or a capstan winch.
Good old British Engineering... What happened to that lol...? When accountants started to run businesses you kissed goodbye to all the preinstalled ready to add options, just to save a few £££
Rustic

 

[rustic]

Oh gawd!



Don't tell Banshee, he'll spend the next three weeks scouring the Internet for a knob that goes up to 11!

:augie

:lol:lol

Well we could keep this one back just for him lol...

Rustic

 

[Blocky10]

Sound advice uncle:thumb2
Being an auto and as long as it's low revs, it would still be possible to brake and stop as I've tried this already. Obviously it depends on how slippery the conditions are but in an "emergency" it would be possible. That's the extent of my trials though, so far. :naughty

 

[rustic]

Sound advice uncle:thumb2
Being an auto and as long as it's low revs, it would still be possible to brake and stop as I've tried this already. Obviously it depends on how slippery the conditions are but in an "emergency" it would be possible. That's the extent of my trials though, so far. :naughty

From what was suggested earlier, a braking action can be made to disable it, also use of the handbrake, or for a manual, dipping the clutch, or opening a door lol

An Automatic would need some more thought, my ideas are based on a manual gear box.

There is also a safety issue, should the knob or wiring develop a fault, then you have to ensure that you never get full throttle...
Clearly there would be liability against any design of such a device.

Hmm.. suddenly not that easy.
Rustic

 

[Blocky10]

Got it!
Different thickness blocks to wedge under the pedal:thumbs

 

[Barrbeast]

It's a drive by wire throttle thing rather than an auto thing bud as I know exactly what you mean!

I know manuals will be a bit different and I've got a Trol rather than a Terrano but a lot of the time over the bouncy bits I'm just in 2nd Low running at tickover with the occasional blip to get her over the rockier bits moving to 1st Low if it's especially technical :nenau

Don't forget the usefulness of Low box for steady speed offroading especially descents

 

[elty001]

never had any problems with my auto:nenau
Have to ride the brakes a bit more as they tend to run away sometimes but handbrake on a couple of clicks sorts that out:thumb2

 

[Barrbeast]

Should have added that like Elty I don't have an issue now as I've got used to it but I did find it difficult to modulate the throttle initially when offroading :nenau

 

[Monaro Pete]

Oh gawd!



Don't tell Banshee, he'll spend the next three weeks scouring the Internet for a knob that goes up to 11!

:augie

Well if he finds one, I don't wanna see it :lol

 

[Monaro Pete]

The last vehicle I drove with a hand throttle was a series 2 lr:lol

Uhmmmm, last vehicle I drove with a hand throttle was my Dad's Massey tractor.

Not good when you park in front of a wooden five bar gate & forget to slack it back, leave it in gear & get out :lol :lol

I can still hear the gate cracking now as it carried on without me :lol :lol :lol

In my defence I was only thirteen.

 

[terranosaurusdoug]

How about tricking the maf sensor, sort of like a maf amp, or maybe a tuning box style contraption?

 

[Blocky10]

Top comments guys. Maybe it is something I just need to get used to. Still learning this off roading with an auto but can't help feeling tick over needs to be a little higher.:nenau:thumb2

 

[solarman216]

Not being an Auto driver I cannot quite see the need, I certainly had no problems with jerky foot on the rough stuff, heal firmly on the floor rocking foot is oblivious to the lumps, Rick