Exam 10: Governors and Electronic Control Systems

Which of the following is another name for the automotive governor?

Technician A says that the units on a scanner for a fuel pressure regulator energized by a PWM signal will be reported in volts and amps of electrical current. Technician B says that the units for a PWM signal may be reported as a percentage or in milliseconds Who is correct?

Without the governors' ability to regulate fuel delivery for varying speed and load conditions, engine operation would at best be erratic and at worst result in:

Technician A says that a cam position sensor can sense engine speed and position. Technician B says that a crankshaft position sensor can sense engine speed and position Who is correct?

Which of the following is NOT a major division of electronic governor control systems?

Identify the typical programmable range in a governor for maximum cruise control speed.

Which of the following is an electrical signal that varies in on and off time?

Two technicians are discussing electronic diesel engine governors. Technician A says that programmable governor features fall into three basic categories: factory specified, customer specified, and dealer specified. Technician B says that almost any measurable variable affecting either engine or vehicle operation can be adjusted through programmable software. Who is right?

Technician A says that comprehending governor terms and principles is helpful to technicians when they analyze engine performance or emission-related problems. Technician B says that understanding governor operating principles will help build effective diagnostic and service skills. Who is right?

Which of the following features is used to prevent driveline windup or jerking during vehicle deceleration?

Technician A says that the ECM will compare sensor data with an expected or commanded value provided by a calibration lookup table and ask a series of "if" questions. Technician B says if the lookup-table value matches the sensed measurement, then the ECM changes the electrical signal supplied to the actuator. Who is right?

Exceeding the rated speed of an engine will produce smoke emissions from incompletely burned fuel, because the time available for combustion events becomes

Which control system has faster microprocessors that have larger memory storage capacity, made possible by the desktop computer?

Technicians A and B are making programmable parameter adjustments for the governor used by an engine to drive a PTO that is operating a hydraulic pump on a landscaping truck. Technician A says that the PTO throttle switch should be configured so that the engine governor that drives the PTO is a variable-speed governor. Technician B says that the engine should be set up to use an automotive-type governor when the PTO is operating. Who is correct?

Which type of governor senses changes in engine load and automatically adjusts the fuel rate to compensate for load changes?

What type of control is also used to operate devices where the relationship between input and the output state can be easily modeled by a mathematical formula?

Technician A says that any type of governor will always attempt to maintain engine idle speed even if two or three cylinders are misfiring. Technician B says that only a variable-speed governor will compensate for a misfire loss from one or two cylinders and maintain idle speed. Who is correct?

On mechanical or electronically controlled high-pressure injection systems, very small changes in injection quantity produce very large changes in:

Partial-authority systems range from electronically controlling just cruise control functions to electronically governing all fuel metering and injection timing control by using:

Maximum engine speed is adjusted by increasing or decreasing the: