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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315

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BuyFindarrow_forward

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315
Textbook Problem

While discussing PCV valve operation: Technician A says that the PCV valve opening is decreased at part-throttle operation compared to idle operation. Technician B says that the PCV valve opening is decreased at wide-open throttle compared to part throttle. Who is correct?

a. Technician A only

b. Technician B only

c. Both A and B

d. Neither A nor B

To determine

The correct technician between A and B who are discussing the operation of PCV valve.

Explanation

The opening of a PCV valve which is supported by a spring is dependent on the manifold vacuum, that is, a high vacuum implies less opening and low vacuum implies more opening.

In the idle operation, the manifold vacuum intake is high which means the opening of the valve will be less, that is, small.

In the part throttle operations, the manifold vacuum intake is less as compared to idle operations which imply that the PCV valve will open more than the opening of the valve in the idle operations...

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