How Does the PCM Disable a Cylinder on an Engine

question 13

Multiple Choice

How does the PCM disable a cylinder on an engine with a variable displacement system?

• A)The PCM turns off the fuel injector on selected cylinders and allows the intake and exhaust valves to operate normally.
• B)The PCM turns off the fuel injector on selected cylinders and energizes an oil solenoid that results in both the intake and exhaust valves staying open in order to reduce pumping losses.
• C)The PCM turns off the fuel injector on selected cylinders and energizes an oil solenoid that results in both the intake and exhaust valves staying closed in order to reduce pumping losses.
• D)The PCM keeps the fuel injectors energized continuously on selected cylinders in order to reduce the volume of air that those cylinders can bring in.

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Definitions:

Fixed Costs

Costs that do not change with the level of output, remaining constant regardless of the scale of production or services provided.

Marginal Revenue

The additional income from selling one more unit of a good; sometimes equal to the price of the good.

Total Fixed Costs

The sum of all costs that remain constant regardless of the level of production or output in a business.

Recession

A period of declining real GDP, accompanied by lower real income and higher unemployment.