সারাংশ

Early Brayton engine lithograph taken from Dugald Clerk's 1886 book "Oil and Gas Engines" - available without copyright on the internet. The image probably dates to 1873, but even if that is incorrect then Dugald Clerk died in 1932 hence categorised as :

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এই কর্মটি এর উৎস দেশে পাবলিক ডোমেইনে রয়েছে এবং অন্যান্য দেশ ও অঞ্চলে যেখানে কপিরাটের সময়সীমা হচ্ছে লেখকের জীবন যোগ ৭০ বছর বা তাঁর কম। You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).

এই ফাইলটি কপিরাইট আইনের আওতায় জানা সকল বাধানিষেধ মুক্ত বলে চিহ্নিত হয়েছে, যার মধ্যে সম্পর্কিত সকল স্বত্ব ও নেইবারিং সত্ত্ব সংযুক্ত।

https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse.

This engine is the original gas engine (not gasoline), and most later engines were liquid fuelled. It is unlike any working engines before, and unlike most piston engines since. The following account from Dugald Clerk summarises its action :

"In this engine there are two cylinders, compressing pump and motor. The charge of gas and air is drawn into the pump on the out-stroke and compressed on the return into a receiver ; the pressure usual in the receiver varies from 60 to 80 Ibs. per square inch above atmosphere. The motor cylinder takes its supply from the receiver but the mixture is ignited as it enters, a grating arrangement preventing the flame from passing back; the mixture, in fact, does not enter the motor cylinder at all ; what enters it, is a continuous flame. At a certain point the supply of flame is cut off and the piston, moving on to the end of its stroke, expands the volume, of hot gases to nearly atmospheric pressure before discharge."

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