Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 12, Problem 2MC
To allow the engine to run on the Atkinson cycle, Toyota’s VVT-i system causes the-
- intake valve to open early
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The gas/oil mixture used in a two stroke engine has been properly mixed. The carburetor high speed & cruise circuit is adjusted to lean. Tech a says that the lean adjustment may cause the engine to fail due to improper lubrication: tech b says that it may cause the engine to fail because of overheating. Who is correct?
Chapter 12 Solutions
Automotive Technology
Ch. 12 - Explain staged and continuously variable value...Ch. 12 - Prob. 2SACh. 12 - Define valve margin.Ch. 12 - What usually causes warpage in an aluminum cylin...Ch. 12 - What are the two ways pushrods can be checked for...Ch. 12 - True False? Fiats MultiAir system relies on...Ch. 12 - True False? Camshaft straightness is checked using...Ch. 12 - Which of the following is not true of knurling? It...Ch. 12 - To allow the engine to run on the Atkinson cycle,...Ch. 12 - To ensure proper seating of the valve, the valve...
Ch. 12 - Many engines with WT have a phaser mounted to the...Ch. 12 - Multiple valve engines tend to be more efficient...Ch. 12 - Which of the following is not a type of valve...Ch. 12 - What type of valve lifter automatically...Ch. 12 - Prob. 8MCCh. 12 - While discussing the reasons for resurfacing a...Ch. 12 - While inspecting the timing gears of an engine:...Ch. 12 - Technician A says that positive valve stem seals...Ch. 12 - Prob. 4ASRQCh. 12 - Technician A says an engine may use one or more...Ch. 12 - Technician A says it is not necessary to measure...Ch. 12 - While discussing the Valvetronic system:...Ch. 12 - While checking a hydraulic phaser after the...Ch. 12 - While servicing a pair of aluminum cylinder heads:...Ch. 12 - While discussing camshafts Technician A says valve...
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- 38arrow_forwardC- Fill the blank 1- Internal combustion engines classified according to air intake into the cylinder to and-- 2- Typical compression ratio for modern gasoline engine lie between 3- There are a number of gasoline additives that are used to raise the octane number such as 4- Higher compression ratio in SI engine lead to 5- The thermal efficiency of CI engine is than of SI engine. 6- Fuel with octane number of 78 indicate 78%- -and 22%- 7- Anti-Knock quality improves with - no. of carbon atoms. 8- Higher compression ratio in SI engine lead to 9- Maximum power overtaking a vehicle or climbing up a hill (extra load) this requires a mixture.arrow_forwardIt is a multiple choice marine diesel engine question, please specify the correct option.arrow_forward
- Tech a says some Briggs engines use an easy spin or compression release to make engine starting easier. Tech b says the easy spin opens the intake valve slightly on start up. Who is correct?arrow_forwardList three alternative fuels for an internal combustion engine and briefly explain where they come from.arrow_forwardIt is a multiple choice marine diesel engine question, please specify the correct option.arrow_forward
- What defines the combustion chamber of afour-stroke engine?arrow_forwardDiscuss briefly the fuel injection system and carburetor system for SI-internal combustion engine.arrow_forwardA engine develops power output for each two engine revolution. * Your answer It is the difference in expansion amounts between the cylinder head and pushrod that effectively increases the space between the valve stem and the rocker's arm. * Your answer On a four-stroke cycle reciprocating engine, which strokes are both valves close? * Intake Power Ignition Compression Exhaust It represents the net power output of the engine at the crankshaft. * Your answer If the fuel/air ratio is proper and ignition timing is correct, the combustion process should be completed just after center at the beginning of the power stroke. * Your answerarrow_forward
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