Concept explainers
Explain why a small PCV valve opening is adequate at idle speed.
The presence and importance of a small PCV valve opening is adequate at idle speed.
Explanation of Solution
A small valve opening as PCV is considered as satisfactory to run an engine at idle speed. These small valves help the engine to draw fresh air from the atmosphere through a filter cap which is vented. It helps in stopping the engine to release hydrocarbons directly to the atmosphere. When the vehicle is shut off, the excessive vapor present is forced out through the vent present at the oil filler cap. For a vehicle to run idle, a small opening is a must. PCV valve stops harmful emissions as it protects the environment from smog and other kinds of pollution caused by vehicle emission.
The PCV system works as there is a hole present inside the filtering source of air. Generally, this is provided by an engine air filter. This air helps in drawing the air from the crankcase, further it burns them into the engine. This extracts air from the crankcase and creates a vacuum inside the crankcase. PCV has helped in removing the extra pressure inside the crankcase. This helps in preventing leakage problems.
An absence of the PCV will cause contamination of the internal components of the engine. It will lead to sludge formation as the water and acid will be trapped inside the crankcase.
Want to see more full solutions like this?
Chapter 33 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
- Show all work. Indicate the origin that is used for each plane. Identify the Miller indices for the following planes. N 23 1 A) X B) yarrow_forwardthe following table gives weight gain time data for the oxidation of some metal at an elevated temperature W(mg/cm2). Time (min) 4.66 20 11.7 50 41.1 175 a) determin whether the oxidation kinetics obey a linear, parabolic, or logarithmic rate expression. b) Now compute W after a time of 1000 minarrow_forwardA cylindrical specimen of aluminum is pulled in tension. Use the stress v. strain plot below for this specimen of Al to answer parts (a) - (f). Hint: Each strain increment is 0.004. Be sure to include your engineering problem solving method per the class rubric. 400 350 300 250 Stress (MPa) 200 150 100 50 Aluminum (Stress v. Strain) 0 0 0.02 0.04 0.06 0.08 Strain 0.1 0.12 0.14 0.16 a. Compute the modulus of elasticity. b. Determine the yield strength at a strain offset of 0.002. c. Determine the tensile strength of this metal. d. Compute the ductility in percent elongation. e. Compute the modulus of resilience. f. Determine the elastic strain recovery for an unloaded stress of 340 MPa.arrow_forward
- Consider a single crystal of silver oriented such that a tensile stress is applied along a [112] direction. If slip occurs on a (011) plane and in a [111] direction and is initiated at an applied tensile stress of 15.9 MPa, compute the critical resolved shear stress.arrow_forwardA hypothetical component must not fail when a tensile stress of 15.25 MPa is applied. Determine the maximum allowable internal crack length if the surface energy of the component is 1.50 J/m2. Assume a modulus of elasticity of 350 GPa.arrow_forwardFresh air at 21.1 C in which partial pressure of water vapor is 0.018 atmosphere is blown at the rate of 214 m3/h first through a preheater and then adiabatically saturated in spray chambers to 100% saturation and again reheated this reheated air has humidity of 0.024 kg water vapor per kg dry air. It is assumed that the fresh air and the air leaving the re-heater have the same percentage humidity. Determine:- a- The temperature of preheater, spray-chamber and re-heater b- Heat requirement for preheating and re-heating 11:39 مarrow_forward
- Example(3): 0.15 kg/s steam at atmospheric pressure and superheated to 400 K is bled into an air stream at 320 K and 20 per cent relative humidity. What is the temperature, enthalpy, and relative humidity of the mixed stream if the air is flowing at 5 kg/ s? How much steam would be required to provide an exit temperature of 330 K and what would be the humidity of this mixture? 11:39 مarrow_forwardThe answer to the problem is 31.3rad/s. Please show me how to get the final answerarrow_forwardThe answer to the problem is 1.00 m/s^2. Please show me how to get the final answerarrow_forward
- Automotive Technology: A Systems Approach (MindTa...Mechanical EngineeringISBN:9781133612315Author:Jack Erjavec, Rob ThompsonPublisher:Cengage LearningWelding: Principles and Applications (MindTap Cou...Mechanical EngineeringISBN:9781305494695Author:Larry JeffusPublisher:Cengage LearningRefrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
- Automotive TechnologyMechanical EngineeringISBN:9781337794213Author:ERJAVEC, Jack.Publisher:Cengage,