Model-Based Research of Series Hybrid Powertrain Fuel Efficiency

Tomohisa Kumagai (The Research association of Automotive Internal Combustion Engines)･Masaki Naruke･Tomohiro Kanda･Takayuki Ito･Takaaki Kitamuara (JARI)

Further fuel economy of gasoline-powered vehicles is of great importance for achieving carbon neutrality of the society. The present paper deals with a concept study of a series hybrid powertrain to reduce CO₂ emissions as much as possible, considering both engine and vehicle key performances. The study utilized model-based research using 0D/1D/3D-CAE and DOE optimization techniques.

The Optimization of Cooling System of Engine with Integrated Thermal Management Module

Changjoo Lee (Hyundai Motor)

In this study, the turbo outlet side and the reservoir side circuit were separated to prevent flow to the reservoir side when the zero flow state. Additionally, by using zero flow state even in the maximum heating mode, heating performance has also been improved, and fuel efficiency and emission improvement effects on the real road are also expected. Through this, the effect of improving the warm-up speed and the effect of improving fuel efficiency, emission, and heating performance were confirmed.

2.4L Turbocharged Gasoline Engine for New Body-on-Frame Truck Application

Keiichi Goto･Akihiro Ikeda･Alistair Bridge･Yasuyuki Takaki･Noriyuki Yamada･Haruhito Fujimura (Toyota Motor)

A new 2.4L Turbocharged gasoline engine developed，based TNGA Turbo series for transverse application, specifically for longditudinal installation into Frame based vehicles. Turbocharger and intake/exhaust were optimised to improve performance, engine structure was developed to adapt to off-road needs, high speed combustion adopted for emission performance, synergy with hybrid system was incorporated alongside complimentary technlogies.

V6 3.5L-Turbocharged Gasoline Engine Development for New Premium Off-Road SUV

Hiroshi Kuma･Akihiro Ikeda･Yuya Yoshikawa･Hiroyuki Asahina･Haruto Ura (Toyota Motor)･Toshihiro Sugitani (IHI)

This paper shows newly developed 3.5L V6 Turbocharged engine for premium SUV. Based on the high-speed combustion that characterizes the turbocharged TNGA series, new high-efficiency turbocharger and optimized intake and exhaust systems are applied for class-leading low-end torque for off-road drivability, output performance and environmental performance.

Development for 8C New Rotary Engine
-Continual Challenge to Rotary Engine Combustion Technology-

Kiyotaka Tanaka･Hiroyuki Hidaka･Takeshi Yokoo･Hiroki Morimoto･Toru Miyamoto･Katsuya Nakajima･Takuya Kikuchi･Yugou Sunagare･Tetsuya Nomoto･Yoshito Wakabayashi (Mazda)

Mazda has developed an 8C rotary engine, making a comeback after approximately 11 years.Ideal combustion was pursued with a higher compression ratio than a 13B previous model, direct fuel injection, cooled EGR system, and a change in the shape of combustion chamber.The displacement was optimized as a generator-dedicated unit.As a result,a significant improvement in thermal efficiency and full-range λ=1 operation were achieved.