Dumbest question ever

Dave BN · Jul 20, 2019

Do diesel engine tractors have governors like their gasoline counterparts? If so, how does that work?

Dave

rustyfarmall · Jul 20, 2019

Governor is built into the injection pump.

john in la · Jul 20, 2019

Or controlled by the computer on newer models.
With the computer they can set a different rpm for each gear.

SVcummins · Jul 20, 2019

kcm.MN · Jul 20, 2019

The only stupid question is the one that's never asked. :wink:

Bob Bancroft · Jul 20, 2019

As you might imagine, it controls fuel flow, rather than controlling a throttle plate. Much more precise engine speed control is possible.

JDEM · Jul 20, 2019

Assuming you are talking about mechanical injected diesels, pumps can have centrifugal governors or air-governors. Just like many lawn mower engines do. Most tractors like discussed here on YT Tractors with diesels have centrifugal governors. Some exceptions are International Harvester B-275s and Ford Majors that used air-governors.

r.w.b. · Jul 20, 2019

Continnetal diesels has flyweight governors like gas engines connected to injection pumps simular to a carburator.massy harris 33,333,44,444,55,555 and case 300 all come to mind

pete 23 · Jul 20, 2019

Also, on the Neuss (German engines) used in some IH tractors and equipment that used the rotary injection pump, the governor was hydraulic. Later pumps went to mechanical governors also. A mechanical governor is a balancing device that a given throttle setting determines the pressure exerted against the weights with a spring and on a diesel engine, when the rpm's drop, the weights over come the spring pressure and give the engine more fuel to maintain the set rpm's.

On a gasoline engine, the governor does same thing except it opens the throttle valve (butterfly) in carburetor and allows more air which in turn draws more fuel through carburetor.

SVcummins · Jul 20, 2019

And a lot more efficient

JimB2 · Jul 20, 2019

JDEM, I used to drive a neighbors IH B-250 Diesel with the air-governors same as early B-275s. I hated that B-250, the governor was always very slow to respond and you would be adjusting the throttle all the time. It could have been his tractor as he never maintained anything very well. The B-275s that I drove had the rotary CAV pump like the B-414Ds, much better governor response. The most sensitive governors were on the MFs with the Perkins Diesels and the CAV pumps.

Dumbest question ever

Dave BN

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rustyfarmall

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john in la

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SVcummins

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kcm.MN

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Bob Bancroft

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JDEM

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r.w.b.

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pete 23

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SVcummins

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