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.