Welcome to 365 Days of Motoring

An Everyday Journey Through Motoring History, Facts & Trivia

Belt up and enjoy this 365-day ride as you cruise past the most momentous motoring events in history. Packed with fascinating facts about races, motorists and the history of the mighty engine, this is a must-visit web site for any car enthusiast.

On This Day

Sunday 14th March 1909

109 years ago

Prosper L'Orange, Benz engineer, was issued with a patent for a pre-combustion chamber type diesel engine that led to the manufacturing of diesel-powered automobiles. The precombustion chamber connects to the engine cylinder via a restricted passage, or burner. In operation, a narrow cone of fuel is sprayed down towards the burner by the single orifice injector nozzle. At this time the technology did not exist to manufacture nozzles with multiple orifices and diesels used high pressure air to spray the fuel directly into the cylinder. L'Orange also discovered that indirect injection diesel engines ran more smoothly and quietly than direct injection engines. Use of a precombustion chamber also reduced stress on the engine's structure, so that it could be made less heavy than a direct injection engine. However, indirect injection engines require higher compression ratios, about 20:1, to compensate for the greater surface to volume ratio causing more heat loss from the cylinder charge. They are also more difficult to start when cold, therefore the precombustion chambers are fitted with electrically heated glowplugs.

Prosper L'Orange

Prosper L'Orange