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| States including California have enacted laws requiring at least 10% of all
vehicles sold by automakers to be Zero Emission Vehicles (ZEVs). To comply with these laws, Hyundai Motor Company/Kia Motors independently
developed a Super Ultra Low Emission Vehicle (SULEV) in December 2002. |
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1. Engine Group
2. Exhaust System
3. Engine Control System |
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| Hyundai Motor Company has independently developed the technology needed for manufacturing environment-friendly
products that satisfy the world's strictest exhaust emissions standards. It will further use this technology as a source
technology in developing even better methods of responding to ever-increasing emissions restrictions throughout the world. |
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 Inside EGR Control
Intake valve timing changes constantly based on driving conditions to both reduce exhaust emissions and improve fuel efficiency
by maximizing the inside EGR (Exhaust Gas Recirculation) effect. |
Improved Low-temperature Combustion Stability
Most vehicle emissions occur at the initial stage of low-temperature starting. Reducing emissions through lean air-fuel rationing was made possible via designs for fuel injection
optimization, intake port optimization, and improved combustion performance. |
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Exhaust Flow Simulation
Using the results of exhaust flow simulations, an optimal exhaust system was designed for uniform flow formation, and an oxygen sensor position setting was created for the control of air-fuel ratios for each combustion chamber. |
Post-treatment System
Through the development of high-density and ultra-thin wall catalysts, the system can still retain the highest levels of purification capability even after 240,000 km of driving. |
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Air-Fuel Ratio Control
Precise theoretical air-fuel ratio control has been attained at low and average speeds, resulting in improved fuel efficiency and reduced emissions. Target air-fuel ratio control was attained at high speeds, ensuring maximum engine performance in this range. |
Exhaust Emissions Temperature Control
Catalyst activation time has been shortened via emissions temperature control. In addition, purification and durability performance has been improved with the introduction of the modeling technique of catalyst oxygen storage capacity. |