Diesel-Engine Management System Overview
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Questions and Answers

What is the primary advantage of CRDI engines over conventional diesel engines?

  • Reduced emissions
  • Lower maintenance costs
  • Improved fuel efficiency
  • Higher power output and torque (correct)

Which component of the CRDI system is responsible for controlling the fuel injection process?

  • Fuel pressure sensor
  • Diesel pressure pump
  • Fuel pressure regulator
  • Electronic Diesel Control (EDC) Unit (correct)

Which of the following statements about CRDI engines is true?

  • The injectors in CRDI engines have a typical lifespan of around 150,000 miles. (correct)
  • CRDI engines are less expensive than conventional diesel engines.
  • CRDI engines have a lower maintenance cost compared to conventional diesel engines.
  • CRDI engines have lower power output and torque compared to conventional diesel engines.

What is the primary factor that determines the power output from a diesel engine?

<p>Available clutch torque and engine speed (C)</p> Signup and view all the answers

Which of the following is NOT a potential issue with CRDI engines after high mileage?

<p>Increased fuel efficiency (D)</p> Signup and view all the answers

What is the primary function of the fuel pressure regulator in a CRDI system?

<p>Regulate the fuel pressure in the injectors (D)</p> Signup and view all the answers

Which component of the CRDI system is considered the hardest working part?

<p>Diesel pressure pump and injectors (B)</p> Signup and view all the answers

What is the primary disadvantage of CRDI engines compared to conventional diesel engines?

<p>Higher maintenance costs and expensive parts (D)</p> Signup and view all the answers

What is the purpose of the charge-cycle losses in a diesel engine?

<p>Reduce the available clutch torque (B)</p> Signup and view all the answers

Which of the following statements about CRDI engines is FALSE?

<p>CRDI engines have lower maintenance costs than conventional diesel engines. (C)</p> Signup and view all the answers

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