Diesels, PTO's and governors

[Sprint]

just out of curiousity, was there ever a governor available for diesel series LR's?

are they needed?

are they available for isuzu's and 300TDI's?

[rovercare]

Huh? they are inclusive in all of the above, hold the go pedal to the floor and you'll not it stops revving up any further than a preset RPM, its inbuilt in the pump on these;)

[Sprint]

the idea being for when you're running a PTO and whatever is being driven by the PTO comes under load.....

[Blknight.aus]

yes there is a governor, yes its required.

All mechanically injected diesels have a governor usually its a variable min/max limited setup where the position of the accelerator linkage raises the minimum RPM permitted setting.

you can get an external fitted governor similar to the one that was fitted to the petrols but generally with an old school diesel if you load it up and get it to sit at the RPMS you want and then lock the throttle if the pump is in top order then the rpms wont raise as the load comes off.

you could make a diesel without a governor built into the pump but you have merry hell trying to get it to idle or maintain smooth reactions to throttle position changes while lightly loaded.

[rovercare]

the idea being for when you're running a PTO and whatever is being driven by the PTO comes under load.....

Everything with a PTO, tractors etc, have their governor speed set at max RPM and that's where the work gets done, on the governor;)

[Sprint]

Everything with a PTO, tractors etc, have their governor speed set at max RPM and that's where the work gets done, on the governor;)

in this case, it would be a PTO driven generator on a landrover with a PTO speed of 3000RPM required

[rovercare]

in this case, it would be a PTO driven generator on a landrover with a PTO speed of 3000RPM required

So you want 3000rpms for 50Hz;)

I'd just adjust the mechanical governor to accomodate:D

[Blknight.aus]

from memory that would be on the governor in 3rd gear.

[Sprint]

please, be gentle, diesels arent my forte!

[Blknight.aus]

why would you want to run a 3000 RPM generator off of a lany pto?


how much power are you trying to make here?

[Sprint]

just kicking an idea around with an ex employer......

4.5-5kva, and he's quoting a 3000 RPM operating speed for the generator

[Blknight.aus]

I think you need to come and eyeball my junk pile, I may just have an engine that would happily drive that.

[Sprint]

theres a reason it's being driven by a LR engine with a PTO somwhere between the engine and the generator...... he's a lil sick of carting portable gensets around, and a vehicle mounted setup appeals to him

[Blknight.aus]

ahh.

[Sleepy]

Is this what your talking about ?

1948 - 70 series 1 2 land rover engine governor pto - eBay, Land Rover, Classic Car Parts, Cars, Parts Vehicles. (end time 21-Apr-09 18:16:58 AEST) (http://cgi.ebay.com.au/1948-70-series-1-2-land-rover-engine-governor-pto_W0QQitemZ160327657796QQihZ006QQcategoryZ27379Q QssPageNameZWDVWQQrdZ1QQcmdZViewItem)

[Sprint]

Is this what your talking about ?

1948 - 70 series 1 2 land rover engine governor pto - eBay, Land Rover, Classic Car Parts, Cars, Parts Vehicles. (end time 21-Apr-09 18:16:58 AEST) (http://cgi.ebay.com.au/1948-70-series-1-2-land-rover-engine-governor-pto_W0QQitemZ160327657796QQihZ006QQcategoryZ27379Q QssPageNameZWDVWQQrdZ1QQcmdZViewItem)

thats the one!

[Sprint]

just to make sure ive got this right

with a diesel, if i dial up 3000rpm on the hand throttle with the PTO engaged but not under load, when the PTO comes under load, the governor will keep it at 3000rpm?

[Blknight.aus]

providing the engine is in good order and making the power required at those RPMs.


yep.

[Jimmy93]

This is probably a very ignorant question, but I dont understand why this isnt done more often??

Im trying to research it at the moment and there is next to no information on it..
Surely lots of people with there land rover set up for camping would want this instead of carting a separate generator around?
Is it too heavy, costly or too hard to fit?

Seems like a good way to use an otherwise waisted feature..

Cheers
Jimmy

[JDNSW]

To put it explicitly, which nobody seems to have actually said:-

Series landrover diesels do not have a control that changes engine power. The "throttle" is actually a control that adjusts the engine governed speed using the governor built into the CAV injection pump.

This means that for a fixed position of the accelerator pedal or hand "throttle", the engine speed will remain constant regardless of load, within limits set by the maximum power available at that setting, and the response time of the governor.

There is no good reason why a power alternator could not be run on a Series Landrover PTO, but there are a number of possible problems and limitations to consider.

1. PTOs are rare and expensive.
2. If the power drain is going to be very low for more than a few minutes, then remember that like most diesels, the engine will not take kindly to this sort of use, and you can expect cylinder wall glazing and an early overhaul.
3. If PTO stationary use exceeds about 25% of rated power, then the engine will require a military fan and an oil cooler. Both are rare and expensive.

Petrol engines required an external governor, and these exist. Much the same problems apply to the petrol engine.

John

[deRanged Rover]

just out of curiousity, was there ever a governor available for diesel series LR's?

are they needed?

are they available for isuzu's and 300TDI's?

A variable RPM governor is just as essential for a diesel as it is for a petrol engine.

The throttle setting just provides the fuel/air required to maintain the RPM as a particular load. Any change to the load automatically results is a change to the RPM which can be disastrous depending upon which machinery is being driven by the PTO.

All LandRovers (both petrol & diesel) fitted with rear PTO units were fitted with governors. A have a couple of these that came with PTO assemblies. Although dealers also fitted PTO assemblies and sometimes 'forgot' to fit the governors.

Stationery diesel engine units such as used for electricity generation normally have a variable RPM governor built into the injector pump that allows fine RPM tuning as well as the 1500/1800 RPM alteration between our 50 Hz and USA's 60 Hz domestic electrical systems. Without accurate governing an RPM variation of more than about 10% simply destroys electrical appliances. Many appliances are even more intolerant of variations in Hz/RPM.

[Jimmy93]

Cheers for the details!

My plans seem less realistic or very expensive haha

Jimmy