Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Chapter 30, Problem 9RQ
When the throttle plates are closed in a port injection system, where does the air needed for idle speeds come from?
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Explain working method of rotary distributor injection pump of diesel engines.
While discussing the compression ratios used with engines equipped with a GDI system: Technician A says that higher ratios can be used because ignition timing is normally very advanced. Technician B says that higher ratios are possible because the small droplets of fuel injected directly into the cylinder tend to cool the mixture in the cylinder. Who is correct?a.tech a
b.tech b
c. Both a and b
d. Neither a nor b
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Chapter 30 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 30 - Explain the major differences between port fuel...Ch. 30 - What is meant by sequential firing of fuel...Ch. 30 - Prob. 3RQCh. 30 - Explain how the computer controls the air-fuel...Ch. 30 - True or False? Diesel engines require higher fuel...Ch. 30 - Describe the purpose of a manifold absolute...Ch. 30 - Explain the basic operation of a CSFI system.Ch. 30 - True or False? In GDI systems, the PCM controls...Ch. 30 - When the throttle plates are closed in a port...Ch. 30 - If the injector pulse width is increased, the...
Ch. 30 - When the engine is idling, the pressure regulator...Ch. 30 - Why are special fuel injectors needed for GDI...Ch. 30 - How does a GDI system provide for a stratified...Ch. 30 - How does a piezoelectric injector work?Ch. 30 - Which of the following statements about fuel trim...Ch. 30 - While discussing EFI systems: Technician A says...Ch. 30 - While discussing electronic fuel injection...Ch. 30 - While discussing returnless fuel systems:...Ch. 30 - While discussing central port injection systems:...Ch. 30 - While discussing throttle-by-wire systems:...Ch. 30 - While discussing the compression ratios used with...Ch. 30 - While discussing air-fuel ratios: Technician A...Ch. 30 - Technician A says that air-fuel ratios can be...Ch. 30 - While discussing GDI systems: Technician A says...Ch. 30 - While discussing SFI systems: Technician A says...
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- The injector function in diesel engine is to a. inject fuel continusously when engine is running. b. inject fuel at the beginning of comprssion stroke c. inject fuel at the end of expansion stroke d. inject fuel at end of compression strokearrow_forwardWhen the throttle plates are closed in a port injectionsystem, where does the air needed for idle speedscome from?arrow_forwardDifferentiate the two types of external combustion enginearrow_forward
- 2- What is normal air flow rate? How is air flow pressure measured? 4- Which engine produces the most torque (diesel or petrol)? why? 5- Mention the air fuel ratio required by the engine during (a) Starting time zero load (b) Normal running half load (C)full load 6- Types of lubrication in an IC engine?arrow_forwardinternal combustion engine help pleasearrow_forwardexplain? 2- Explain the differences and similarities between the engine temperature sensitivity and the incoming air temperature. How do they influence the balance of the injected fuel volume determined by the ECU?arrow_forward
- What would happen if one of the Flow Controls were reversed in a cylinder? What are the disadvantages by doing so?arrow_forward1: List the safety mechanisms that contrast medium injection devices are equipped with. 2: What are the five factor that affect injector flow rate?arrow_forwardWhich of the following is not characteristic of a supercharger? a. It is used to increase engine power by compressing the air that goes into the combustion chambers. b. It usually is located close to the exhaust manifold. c. It utilizes a belt-driven pulley. d. It requires a mechanical connection between the engine and the pressurizing pump to compress the intake gases.arrow_forward
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