Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 9, Problem 15RQ
Which of the following is an expression of how much of the heat formed during the combustion process is available as power from the engine?
Mechanical efficiency
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Which of the following is the best description of the power stroke?
The ignition of the air fuel mixture increases pressure in the cylinder, which applies force to the face of the piston,
driving it down.
As the piston travels upward, it pushes the products of combustion out of the open exhaust valve.
The crankshaft drives the piston down as the flywheel absorbs the energy created by the ignition of air fuel
mixture.
An air-fuel mixture is drawn into the combustion chamber as the piston moves toward the bottom of the cylinder.
Which one of the following
energy resources can be
replenished in a short period
of time?
Biomass
Compressed natural
gas
Coal
Petroleum
intake valve
intake
compression
JO BI
Tuel injector
the temperature of the gas;
power
exnaust vaive
0010
exhaust
The diagrams show the cylinder of a petrol engine in 4 stages. Petrol vapour
and air are drawn into the cylinder, The mixture is then squeezed together, and
then exploded by a spark. The explosion pushes down the piston. The exhaust
gases are then expelled from the cylinder.
Use the first law of thermodynamics to analyse the energy changes during the
process.
At each stage explain what happens to
i) the pressure of the gas;
ii)
Chapter 9 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 9 - Prob. 1RQCh. 9 - Describe what takes place during the four strokes...Ch. 9 - As an engines compression ratio increases, what...Ch. 9 - What test can be performed to check the efficiency...Ch. 9 - Describe tappet noise.Ch. 9 - Which of the following statements about engines is...Ch. 9 - Which stroke in the four-stroke cycle begins as...Ch. 9 - True or False? In an HCCI engine, combustion...Ch. 9 - Which of the following is not a true statement...Ch. 9 - True or False? SAE mandates that engine, when...
Ch. 9 - Technician A says head gasket thickness has an...Ch. 9 - Prob. 12RQCh. 9 - The stroke of an engine is the crank throw half...Ch. 9 - True or False? The camshaft is always located in...Ch. 9 - Which of the following is an expression of how...Ch. 9 - While diagnosing the cause for blue smoke from the...Ch. 9 - Prob. 2ASRQCh. 9 - While determining the cause for air leaking out of...Ch. 9 - While diagnosing the cause for an engine having...Ch. 9 - While looking at the results of an oil pressure...Ch. 9 - A vehicle is producing a sharp, metallic rapping...Ch. 9 - While conducting an engine vacuum test; Technician...Ch. 9 - While determining the most likely problem of an...Ch. 9 - When a customer states that black exhaust smoke is...Ch. 9 - Technician A says that if an engine had good...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Internal Combustion Enginesarrow_forwardHow do the volumetric efficiency and air-fuel ratio change as the engine's rotational speed changes? With a brief explanation of the change process with an explanation of the reasonsarrow_forwardQ1) What is the meaning of chemical reaction? Write an example of a chemical reaction Q2) Mention the basic flame types and write an example of each type Q3) Compare between wood, lignite and peat in terms of carbon content and calorific value Q4) A small, low emission, stationary gas turbine engine operates at full load (3950 KW) at an equivalence ratio of 0.286 with an air flowrate of 15.9 kg/s. The equivalent composition of the fuel (ethane) is C2 H6. Determine the fuel mass flowrate and the operating air-fuel ratio for the engine. Q5) A gas-stream at 1 atm contains a mixture of CO, CO2 and N, in which the CO mole fraction is 0.15 and the CO2 mole fraction is 0.25. The gas-stream temperature is 1100K. Determine the absolute enthalpy of the mixture on both a mole basis and a mass basis. Also, determine the mass fractions of the three component gasesarrow_forward
- how to improve gas turbine engine fuel efficiency using thermodynamic gas laws?arrow_forwardDiscuss the importance of the fuel supply system in an internal combustion engine.arrow_forwardWhich measure does not necessarily increase the boiler efficiency? Please choice one below : Increasing combustion efficiency Decreasing temperature of the exhaust gases Minimizing heat losses Increasing air-fuel ratio None of thesearrow_forward
- What is specific fuel consumption of an engine?arrow_forwardQUESTION 10 A four-cylinder, 3.6-liter, four-stroke cycles Sl engine operates at 2700 RPM with a volumetric efficiency of 87 %. The fuel used is methyl alcohol. The chemical reaction of methyl alcohol in a Stoichiometric condition is: CH3OH + 1.5(02 + 3.76N2) - CO2 + 2H20 + 1.5(3.76N2) The chemical reaction of methyl alcohol in an equivalence ratio of o = 1.23 is: CH3OH + m(02 + 3.76N2) → NCO2 + pCO + 2H20 + m(3.76N2) During combustion, all hydrogen is converted to water, and all carbon is converted to CO2 and CO. The density of standard air is 2.25 kg/m. The atomic masses are as follows: H=1, C=12, 0-16, and N=14. Calculate the following: m is n is p is Mole fraction of CO in the exhaust is The mass flow rate of air into the engine is gram/s.arrow_forwardwhich of the following is an indicator of combustion efficiency and not emission?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Automotive Technology: A Systems Approach (MindTa...Mechanical EngineeringISBN:9781133612315Author:Jack Erjavec, Rob ThompsonPublisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Automotive Technology: A Systems Approach (MindTa...
Mechanical Engineering
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
Extent of Reaction; Author: LearnChemE;https://www.youtube.com/watch?v=__stMf3OLP4;License: Standard Youtube License