The Design and Development of New Hyundai Kappa 1.2L Dual CVVT Engine 2011-01-0416

This paper describes Kappa dual CVVT (Continuously Variable Valve Timing) gasoline engine that Hyundai has developed for small cars lately. This engine is produced at engine plants in India and South Korea. This engine has been installed in small passenger cars named "i10," "i20," "Picanto," etc., and introduced into world market including Europe and India. Nowadays, car makers in the world have been competitively developing small cars in order to cope with rising oil price and becoming more stringent CO₂ emission regulations. The new engine has been introduced into market since November 2010. Main development goals of this engine were to reduce CO₂ emission and improve fuel economy. As a small engine, it was also developed in consideration of generous engine torque, lighter weight, minimal noise, lower cost and compact size. This paper presents various technologies featuring higher torque, better fuel efficiency, lower noise level and lighter weight.

Major items for technical highlights are as follows: - Dual CVVT, Roller swing arm, offset crankshaft, beehive valve spring, MoS₂-coated piston and low tension piston rings for saving fuel consumption. - DOHC(Double Over Head Camshaft) 16V, long runner intake manifold, M12 long reach spark plug and valve timing optimization for excellent torque at low and middle engine speed. - Ladder frame, hydraulic lash adjuster and silent timing chain to reduce the noise.

In addition, to reduce weight this engine is equipped with aluminum cylinder block, plastic cylinder head cover, plastic intake manifold, etc.