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Home > LVDT Applications > Application Notes > LVDT Position Sensor Applications in Vehicles and Stationary Diesel Engines
LVDT Position Sensor Applications in Vehicles and Stationary Diesel Engines
Written by Edward Herceg
Prepared by Harold Schaevitz

For applications on unconventional on-road vehicles like trash and garbage trucks (which, by the way, have any number of requirements for position sensors), or in other cases, in off-road vehicles and construction equipment, there are requirements for LVDTs, either for use with hydraulic positioning systems or for use in steering systems, especially 4-wheel steering systems. There are also applications for sensors in these vehicles for CVTs (continuously variable transmissions) and other transmission related devices like PTOs (power takeoffs), as well as for throttle or fuel rack position in diesel engines.

Another range of applications exists for stationary engines using throttle feedback for governors or remote engine control. Typically, stationary engines are used in pipeline service for pumping stations for petroleum products, fuel oil, or gasoline, or for natural gas compressors. There are a lot of stationary engines used in those applications that are being outfitted with remote monitoring sensors. Another place where stationary engines get used a lot is for auxiliary power systems, and especially those at sewage lift stations. Although estimates vary, there are at a minimum 190,000 lift stations in this country. They almost all have auxiliary power systems to power the pumps in the event of a power failure. If there were to be a power failure, the worst thing to happen would be to have sewers back up and not be pumped out. Every lift station with an auxiliary power system requires some kind of governor system for the engine. More and more of the governors use fuel rack position sensors in servo systems, which could be LVDTs.

In another application, a ferry operating company in Canada wanted to have tandem engine performance on large marine engines. Essentially, they wanted to have the governors and the throttle positions set to match and track each other so that they could have multiple screws running without the danger of the ferry moving off course one way or the other. Another similar requirement for engine throttle position sensing is in dual-fueled diesel engines used on local transit buses. Practically all of these newer engines are electronically controlled and rely on sensor outputs. These are additional illustration of the applications, whether shipboard or stationary engines or off-highway vehicles, where there are engine control requirements outside of the larger automotive and truck marketplace.