Showing papers on "Carbureted compression ignition model engine published in 1972"

Ignition system for an automotive engine having exhaust recirculation arrangement

Abstract: An improved ignition system is herein proposed for use specifically in combination with an automotive engine having an exhaust recirculation system which is adapted to have the exhaust gases recirculated from the engine exhaust system to the engine during predetermined conditions in which toxic nitrogen oxides are produced in the engine in relatively great quantities. the ignition system uses an additional high-tension current generator connected between an ignition power source and an ignition distributor in parallel with a usual high-tension current generator. An electrical circuit arrangement including these two high-tension generators is adapted to fire the air-fuel mixture in the engine with usual energy when the exhaust recirculation system is inoperative and with intensified energy in response to a condition in which the recirculation system is operative.

Effect of Additives on the Cetane Ratings of Diesel Fuels as Related to the Ignition Delays of Liquid Fuel Droplets Impinging on a Hot Surface

Abstract: Results of an investigation show that the effects of additives on the ignition delays of liquid fuel droplets impinging on a hot surface correlate satisfactorily with their effects on the cetane ratings of diesel fuels. It is also shown that additives for diesel fuels may be divided into three categories according to their effects on the above mentioned ignition delays, viz. (1) those that reduce the ignition delay at all dosages, (2) those that reduce the ignition delay at small dosages but increase it at high dosage and (3) those that do not have any significant effect on the ignition delay.

A Fixed-Head Concept Diesel Engine

Abstract: This high-speed automotive diesel engine was designed to achieve the greatest possible reliability in operation, low operating and maintenance costs and maximum versatility of component and auxiliary arrangements, based on long experience of large-scale manufacture of engines for commercial vehicles and the increases in power output and time between overhauls made possible by improvements in design, materials, manufacturing processes, fuels and lubricants.Elimination of the cylinder high-pressure joint was a radical departure from current practice and promised considerable advantages in cooling, reducing thermal stress and freeing restrictions in cylinder-head porting layout. Thus the potential for operating at the highest rating now in use and for future development was improved.This paper deals with the design aims, describes the engine and outlines the development work with single and multi-cylinder engines that has been undertaken to ensure that each commercial variant meets the requirements of its ra...