The Next Generation 1.6L Naturally Aspirated Gasoline Engine from Hyundai-Kia

Autoren

JinYong Kim, YoonHo Cho, SungHyun Park, YongJoon Joo, IlJoong Hwang, YoungJoon Park ,Ph.D., GwangHyun Cho, SeongSik Kim, HwangBok Lee,
Hyundai Motor Group, Hwasung, Süd-Korea

Zusammenfassung

Hyundai-Kia has been developing the next generation gasoline engines for all engine line-up, from the small displacement 3-cylinder engine to the large displacement V-6. Nowadays, it is becoming mandatory to improve vehicle fuel efficiency as well as to meet the stringent emissions regulations at the same time. Therefore, Hyundai-Kia is highly focusing on developing an efficient and clean combustion system for the new engines by all new design of the fundamental combustion process and the reduction of all thermal-mechanical losses with the assistance from smart engine management system. These next generation engines include not only right-sized turbo GDI engines and hybridized engines, but also conventional naturally aspirated engines which are still one of the mainstream engine technologies worldwide for its costeffectiveness.

The next generation 1.6L naturally aspirated engine is at the forefront among the Hyundai-Kia’s new generation engines which will be introduced to the market from 2018 to 2019 sequentially. This engine is equipped with dual port fuel injection (DPFI) system which is chosen for its closer characteristics to the GDI compared to the conventional PFI system. The combination of DPFI’s enhanced fuel injection, highly optimized intake port for tumble flow, and the high ignition energy system improves combustion stability which allows very high external EGR dilution. The
compression ratio of 11.2 which is one of the highest compression ratios among the PFI engines could be achieved with the advanced cross-flow cooling system and the fast combustion. Stroke-to-bore ratio optimization, weight reduction of moving system and various coating technologies reduces mechanical friction up to 34%. Smart
management of the cooling and lubricant system also provides additional fuel savings.

Thanks to the combination of optimized technologies, the fuel efficiency of the next generation 1.6L engine was improved by 10% compared to its predecessor. For vehicle application, the new engine was integrated with the new continuously variable automatic transmission (CVT), and offers additional synergy for the fuel efficiency.

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