In diesel engines, hydraulic valve lifters...

Question 1 / 270705eccefa1bacbc34ba4d476b3

Question 1 of 270705eccefa1bacbc34ba4d476b3

In diesel engines, hydraulic valve lifters are used to __________.

Question 1 of 27070

In diesel engines, hydraulic valve lifters are used to __________.

🔍 Key Concepts

• Function of hydraulic valve lifters in a diesel engine valve train • Meaning of valve lash (clearance) and what happens if it increases or decreases • Causes and prevention of valve gear pounding or noise in valve mechanisms

💭 Think About

• Ask yourself: do hydraulic lifters make the valve motion more aggressive (more lift/longer duration), or more consistent and quiet? • Think about whether hydraulic lifters automatically take up clearance, or whether they create extra clearance in the valve train. • Consider which option would most likely reduce mechanical shock in the valve train components.

✅ Before You Answer

• Verify whether hydraulic lifters are designed to maintain zero (or near-zero) valve lash automatically. • Check which choice would most directly decrease impact and noise between valve train parts when the engine is running. • Eliminate any options that would clearly increase clearance or mechanical shock in the valve mechanism.

Question 1 of 27070

In diesel engines, hydraulic valve lifters are used to __________.

create longer valve duration

obtain greater valve lift

reduce valve gear pounding

increase valve operating lash