Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 33, Problem 13SA
Why do the EGR systems on many late-model diesel vehicles include an EGR cooler?
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Chapter 33 Solutions
Automotive Technology
Ch. 33 - Explain why a small PCV valve opening is adequate...Ch. 33 - At what temperature do nitrogen atoms combine with...Ch. 33 - Describe the operation of a digital EGR valve.Ch. 33 - Name the three types of emissions being controlled...Ch. 33 - The PCV system prevents from escaping to the...Ch. 33 - In a negative backpressure EGR valve, if the...Ch. 33 - Describe how a selective catalytic reduction...Ch. 33 - HC emissions may come from the tailpipe or...Ch. 33 - What types of catalyst are typically used to...Ch. 33 - Why is a PCV system critical to an engines...
Ch. 33 - What is a catalyst?Ch. 33 - Rather then rely on the AIR system for extra...Ch. 33 - Why do the EGR systems on many late-model diesel...Ch. 33 - Which of the following systems is designed to...Ch. 33 - Which of the following statements about carbon...Ch. 33 - While discussing PCV valve operation: Technician A...Ch. 33 - While discussing EGR systems with a differential...Ch. 33 - While discussing evaporative (EVAP) systems:...Ch. 33 - Technician A says that an EGR valve that is stuck...Ch. 33 - While discussing SCR systems: Technician A says...Ch. 33 - While discussing automotive emissions: Technician...Ch. 33 - Technician A says that during oxidation, as NOx...Ch. 33 - While discussing PCV systems without a PCV valve:...Ch. 33 - While diagnosing the cause of high HC and O2...Ch. 33 - While discussing electric exhaust gas...
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- How does SCR lower the content in a diesels exhaust?arrow_forward1-What is specific fuel consumption of an engine? 2-Why does BSFC decrease with load? 3-What happens when petrol is used in diesel engine? Which engine is more efficient? 4-Which engine produces the most torque (diesel or petrol)? Differentiate SFC and TFCarrow_forwardTechnician A says diesel engines can be used in a hybrid powertrain . Technician B says a gaso line engine is normally used in hybrid power train . Who is correct ?arrow_forward
- What are three possible problems that can allow fuel pressure to rapidly bleed down once the engine is shut off?arrow_forwardWhich of the following is not one of the strokes of a four-cycle engine? Compression Exhaust Intake Ignitionarrow_forwardWhat is HUCR in relation to petrol engine?arrow_forward
- Answer each of the following questions regarding diesel engine compression testing: What is the procedure for conducting a diesel engine compression test? (10 - 20 words) Why must the test be done 'dry'? (10 - 20 words)arrow_forwardWhich of the following is not a true statement about diesel engines?a. The operation and main components of a diesel engine are comparable to those of a gasoline engine. Diesel and gasoline engines are available as four- stroke combustion cycle engines. Diesel engines rely on glow plugs instead of spark plugs to initiate ignition. The compression ratio of diesel engines is typically three times that of a gasoline engine.arrow_forwardTechnician A says that only offshore engines are permitted to use port-helix metering fuel systems on EPA MY 2010 compliant and later engines. Technician B says that port-helix metering injection pumps can be used on current diesel engines when the peak power rating is less than 70 BHP (52 kW). Who is correct?arrow_forward
- What is the range of operating AFR in gasoline engines?arrow_forwardeveess air Question Three: a- Describe in details the methods of turbocharging with the arrangement of the exhaust manifolds?arrow_forward1 Before conducting a __________ test, disable the ignition and the __________ injection system. Most manufacturers recommend that the engine be __________ when testing.arrow_forward
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