Find fuel consumption miles per liter for city driving cycle

Assignment Help Civil Engineering

Reference no: EM13313694

A car has the following characteristics: weight = 18000 N; cross-sectional area = 2.5 m^2, drag coefficient = 0.5; rolling friction coefficient = 0.02. The energy content of gasoline is 3.5E10^7 Joules/Liter. The efficiency of fuel use varies with engine and drivetrain operation as described below.

(a) First consider highway driving. Assume a constant velocity of 27 m/s (60.4 mph) on level ground. Under these conditions the efficiency of the engine plus auxiliaries is 30 percent and the efficiency of the drivetrain is 85 percent. What is the fuel consumption in miles/liter under these conditions? Assume the density of air = 1.2 kg/m^3.

(b) Next consider city driving. As you know from your own experience, this is mostly start-stop driving. Assume that there are three start-stop cycles per kilometer of travel (five per mile). For each cycle the car starts from rest, accelerates up to 13 m/s (29.1 mph), then instantaneously stops. Under these conditions the net engine efficiency drops to 20 percent, and the drivetrain efficiency is 80 percent. What is the fuel consumption (miles/liter) for this city driving cycle?

Reference no: EM13313694

Questions Cloud

Explain the change in internal energy of the sysytem : A system absorbs 198kJ of heat and the surroundings do 120kJ of work on the system. What is the change in internal energy of the system

Assignment for critical geopolitics : Select a movie about the Middle East and evaluate it from the perspective of critical geopolitics. The movie that you will choose might be about war, politics, and cultural issues in the Middle East.

Explain how many ml of kf solution be added to hf : How many mL (to the nearest mL) of 0.200-M KF solution should be added to 660. mL of 0.193-M HF to prepare a pH = 3.30 solution

Estimate the chronic daily intake of trichloro ethane : Estimate the chronic daily intake of 1,1,1-trichloro ethane from exposure to a city water supply that contains a 1,1,1-trichloroethane concentration equal to the drinking water standard of 0.2 mg/L.

Find fuel consumption miles per liter for city driving cycle : A car has the following characteristics: weight = 18000 N; cross-sectional area = 2.5 m^2, drag coefficient = 0.5; rolling friction coefficient = 0.02. The energy content of gasoline is 3.5E10^7 Joules/Liter.

What is the nature of media state relations : What is the nature of media state relations in the middle east for example israel

Explain deionized water prior to being diluted with naoh : Using the data collected for part B on your data sheet, calculate the molar mass of the unknown acid. Mass of unknown acid is .501g and volume of NaOH used was 17.51mL Unknown acid was dissolved in 50mL of deionized water prior to being diluted wi..

Explain a coffee-cup calorimeter containing : In the following experiment, a coffee-cup calorimeter containing 100. \rm mL of \rm H_2O is used. The initial temperature of the calorimeter is 23.0

What is the steady state emission rate of co by automobiles : The maximum eight-hour average concentration of carbon monoxide (CO) in an urban area is measured to be 17 ppm. The NAAQS is 9 ppmv (equivalent to 10.3 mg/m^3 estimated at P = 1 atm and T=298.25°K).

User Account

All Pages