A maximum ignition delay Tid of 20° is required for acceptable cold start ignition of an automobile diesel engine. The engine stroke is 80 mm, the cranking speed Wis 200 rpm, and the polytropic coefficient n for compression to top dead center is 1.20. The fuel cetane number is 45, and the inlet air temperature and pressure are 250 K and 1 bar. What is the minimum compression ratio needed to have an ignition delay no longer than 20°?

A maximum ignition delay Tid of 20° is required for acceptable cold start ignition of an automobile diesel engine. The engine stroke is 80 mm, the cranking speed Wis 200 rpm, and the polytropic coefficient n for compression to top dead center is 1.20. The fuel cetane number is 45, and the inlet air temperature and pressure are 250 K and 1 bar. What is the minimum compression ratio needed to have an ignition delay no longer than 20°?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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