audsp98
Silver Member
Does Mahindra offer an auto throttle feature on their HST transmissions?
Auto Throttle
- Thread starter audsp98
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dickfoster
Elite Member
What's an auto throttle? If you mean cruse control then the answer is yes.
dickfoster
Elite Member
Hey I have one of those, it's called the accelerator pedal. I have a hand throttle too. I have a gear tractor not sure about HST but I know they do have the cruise control option for the HST it's not needed with a gear because you have the hand throttle.
AchingBack
Veteran Member
Throttle - Wikipedia
Internal combustion engines
A cross-section view of a throttle valve
In a petrol/gasoline internal combustion engine, the throttle is a valve that directly adjusts the amount of air entering the engine, indirectly controlling the charge (fuel + air) burned on each cycle due to the fuel-injector or carburetor maintaining a relatively constant fuel/air ratio. In a motor vehicle the control used by the driver to regulate power is sometimes called the throttle pedal, as it controls the throttle opening, although "accelerator pedal" is more accurate, since not all vehicles have throttles. A diesel engine does not have a throttle except there is a throttle valve on the newer diesel engines which is generally referred to as air management valves. Air management valves can be with or without integrated control electronics. Air management valves throttle the intake air in the intake air system of diesel engines via electromotive means in order to achieve precision controlled exhaust gas recirculation and prevent the inconvenient shaking that would otherwise occur when the engine is switched off. [1] The power level of a diesel is controlled by regulating the fuel flow into the engine, thus "throttle" and "gas pedal" are both inaccurate terms when applied to any modern computerized engine, diesel or not. Both types (gas and diesel) are now true throttle- by- wire computerized systems with the main difference being that in gasoline engines, the throttle position ultimately controls the amount of air getting into the engine with the computer supplying the fuel via the fuel injectors; whereas in a diesel the throttle position really only informs the computer to supply the amount of fuel via the injectors and in some newer models the actual diesel fuel pressure.[2]
Internal combustion engines
A cross-section view of a throttle valve
In a petrol/gasoline internal combustion engine, the throttle is a valve that directly adjusts the amount of air entering the engine, indirectly controlling the charge (fuel + air) burned on each cycle due to the fuel-injector or carburetor maintaining a relatively constant fuel/air ratio. In a motor vehicle the control used by the driver to regulate power is sometimes called the throttle pedal, as it controls the throttle opening, although "accelerator pedal" is more accurate, since not all vehicles have throttles. A diesel engine does not have a throttle except there is a throttle valve on the newer diesel engines which is generally referred to as air management valves. Air management valves can be with or without integrated control electronics. Air management valves throttle the intake air in the intake air system of diesel engines via electromotive means in order to achieve precision controlled exhaust gas recirculation and prevent the inconvenient shaking that would otherwise occur when the engine is switched off. [1] The power level of a diesel is controlled by regulating the fuel flow into the engine, thus "throttle" and "gas pedal" are both inaccurate terms when applied to any modern computerized engine, diesel or not. Both types (gas and diesel) are now true throttle- by- wire computerized systems with the main difference being that in gasoline engines, the throttle position ultimately controls the amount of air getting into the engine with the computer supplying the fuel via the fuel injectors; whereas in a diesel the throttle position really only informs the computer to supply the amount of fuel via the injectors and in some newer models the actual diesel fuel pressure.[2]
oldpilgrim
Elite Member
The HST has a hand throttle too. The cruise control is a device that sets the HST tranny to a particular spot, basically keeping it in the same 'gear' and allowing you to take your foot off the pedal.
RNeumann
Elite Member
We are trying to be helpful but the wording of your post is cryptic at best. What I'm gathering is you have seen a feature that increases engine RPM when the HST pedal is pressed? Then again, maybe it's an accelerator pedal you are thinking of? If explaining it is too difficult (genuine intent, not sarcasm.......I think- that part was sarcasm. Dam it I'll stop now) please provide the brand of tractor and name of feature you are describing. We are happy to help as most here are happy to talk tractors!
RNeumann
Elite Member
This is why I switched the RPM increasing device on the floorboard of my diesel truck to a gas pedal. It's much faster now!
Kubota calls it auto throttle advance, JD just calls it auto throttle. MF and Kioti offer it as well.
Found this description in another forum discussing Kubota's HST+ transmission.
"As you increase the down pressure on the direction pedal; the engine RPMS will automatically increase as well. As you release the direction pedal, engine rpm's drop down to idle. Gas saver, quieter, less engine wear."
RNeumann
Elite Member
I have a 1538 and have not found that feature. I looked at the Kubota and Kioti very seriously with test drives etc. I was never told about or saw that feature. Is this something on larger machines?