Asap A carburetor, tested in the laboratory has its float chamber vented toatmosphere. The main metering system is adjusted to give an air-fuelratio of 15:1 at sea level conditions. The pressure at the venturi throntis 0.8 bar. The atmospheric pressure is 1 bar. The same carburetor istested again when an air cleaner is fitted at the inlet to the carburetor.The pressure drop to air cleaner is found to be 30 mm of Hg when airflow at sea level condition is 240 kg/h. Assuming zero tip and constamscoefficient of flow, calculate (i) the throat pressure when the air-cleaneris fitted and (ii) air-fuel rat io when the air cleaner is fitted.

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Answered: at the d to be Ssumins

Engineering

Mechanical Engineering

at the d to be Ssumins

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter33: Emission Control Systems

Section: Chapter Questions

Problem 1RQ: Explain why a small PCV valve opening is adequate at idle speed.

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