Chapter 6- Governors

Mechanical

A _____ governor system is a system that uses a gear assembly that meshes with the camshaft or other engine components to sense and maintain the desired engine speed.

Electronic

A _____ governor system that uses a limited angle torque motor in place of the governor spring and speed-sensing device used in a mechanical governor system.

Pneumatic

A ______ governor system is a system which uses force from moving air produced by rotating flywheel fins to sense engine speed.

Armature

A ______ is a rotating part of an electronic motor consisting of a segmented iron core or permanent magnet mounted on the motor shaft.

Speed-Sensing

A _______ device is a governor system component attached through linkage to the throttle plate of the carburetor to sense changes in engine speed.

Governor

A _______ system is a system that maintains a desired engine speed regardless of the load applied to the engine.

Return

A governor _____ spring is an electronic governor system component that applies force to close the throttle plate.

Idle

Governed _____ is a governed system function that allows an engine to accept light to moderate loads at idle speed without stalling the engine.

Droop

Governor _______ is the amount of rpm decrease between the top no-load governed speed and the rpm where power is delivered.

Speed (RPM)

Governor systems limit the amount of horsepower available by controlling engine ________.

True

T/F A change in governor blade material, mass, or angle of air deflection affects overall governor performance on the engine.

True

T/F Governed speed of an engine is the speed obtained at the balance point between the forces of speed-sensing device and governor spring.

False

T/F High throttle plate torque tends to open the throttle plate.

False

T/F Under load, most engines experience an increase in speed whether they have a fixed or a movable throttle plate.

True

T/F With the engine OFF, the throttle control can be set to stretch the governor spring to hold the throttle plate in WOT position.

Pneumatic Force

The ____ from rotating flywheel fins on the governor blade varies depending on engine speed, governor blade position, and governor blade configuration.

no-load

Top _____ speed is the top speed setting an engine achieves without any parasitic load from equipment components.

Reduced

When the throttle plate is moved toward WOT position, torque is ______.

Surging

_____ is the undesirable slow changing of engine RPM in cyclical pattern when set at a desired speed.

Hysteresis

______ is caused as the governor spring oscillates radically and axially to create a phantom spring force increase or decrease based on extension from the free length.

Free-length

______ is the overall dimension of the spring when unloaded.

Throttle control position

based on the ____, governed speed may or may not be the top no-load speed or the governed speed of the engine.