지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2024.11
- 수록면
- 181 - 191 (11page)
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초록· 키워드
오류제보하기
To cope with global customer’s satisfaction, the GHE(Global Hybrid Engine) engine family has been meticulously designed to deliver superior efficiency, exceptional fuel economy, improved NVH (Noise, Vibration, and Harshness) characteristics, and high performance, while maintaining robust reliability and cost-effectiveness. Extensive research was conducted to address real-world driving scenarios, including typical driving patterns observed in Asian countries such as China, Korea and Japan, to define the internal combustion engine (ICE) specifications suitable for hybrid applications. A comprehensive benchmarking of global trends was performed to establish ambitious performance targets across the engine speed and load range, focusing on achieving the highest possible Brake Thermal Efficiency (BTE).
The GHE engine successfully meets all established benchmark targets, achieving a peak BTE of 42.5% and producing a high-performance Miller cycle output of 105 kW with lambda=1 across the entire engine operating map. Furthermore, the GHE is equipped to comply with future emission standards and the anticipated expansion of Real Driving Emissions (RDE) regulations.
The project concept developed is a high-efficiency Miller cycle combustion system characterized by enhanced tumble and Turbulence Kinetic Energy (TKE), reduced friction, and optimized mixture formation facilitated by a new 350 bar Fuel Injection System (FIS) and a 13:1 compression ratio. The system includes a fully integrated turbocharger with a highly cooled Low Pressure Exhaust Gas Recirculation (LP-EGR) and Water-Charge Air Cooler (W-CAC). Additionally, thermal management has been improved through the implementation of an Electric Water Pump (E-WP), a split cooling system, and a Coolant Temperature Adjustment Module (CTAM). The lubrication system has also been optimized, incorporating Electric Piston Cooling Jets (E-PCJ).
A key focus of the project is the refinement of Noise, Vibration, and Harshness (NVH) characteristics from the conceptual design phase. This has been achieved through the use of a suspended injector, which eliminates the NVH transmission path from the 350 bar FIS to the cylinder head. The cylinder pressure rise rate is precisely controlled through optimized combustion processes. Exceptional structural attenuation has been accomplished by optimizing all critical engine components. The inclusion of a Mass Balancer System (MBS) and Dual Mass Flywheel (DMF) further enhances vehicle-integrated NVH performance. Additionally, the die-cast aluminum timing cover, combined with an acoustic cover, significantly reduces engine noise emissions, aligning with the 2022 European pass-by noise regulations and meeting customer expectations.
GHE HP(High Performance Engine), the developing variant with high power, provides the customer demands for fun-to-drive with 100kw/liter specific power and 40%+ BTE. This engine applies soft Miller cycle, the same combustion configuration to GHE with 10.5 compression ratio, higher flow intake port, and mechanical water pump with thermal management system.
This paper describes the detailed system and sub-system configurations of GHE two engine variants, as the subsequent pater of ‘New Hybrid Engine Platform’ which has presented in 2024 KSAE annual spring conference in terms of development strategy, target, technology road map, system definition, etc.
The GHE engine successfully meets all established benchmark targets, achieving a peak BTE of 42.5% and producing a high-performance Miller cycle output of 105 kW with lambda=1 across the entire engine operating map. Furthermore, the GHE is equipped to comply with future emission standards and the anticipated expansion of Real Driving Emissions (RDE) regulations.
The project concept developed is a high-efficiency Miller cycle combustion system characterized by enhanced tumble and Turbulence Kinetic Energy (TKE), reduced friction, and optimized mixture formation facilitated by a new 350 bar Fuel Injection System (FIS) and a 13:1 compression ratio. The system includes a fully integrated turbocharger with a highly cooled Low Pressure Exhaust Gas Recirculation (LP-EGR) and Water-Charge Air Cooler (W-CAC). Additionally, thermal management has been improved through the implementation of an Electric Water Pump (E-WP), a split cooling system, and a Coolant Temperature Adjustment Module (CTAM). The lubrication system has also been optimized, incorporating Electric Piston Cooling Jets (E-PCJ).
A key focus of the project is the refinement of Noise, Vibration, and Harshness (NVH) characteristics from the conceptual design phase. This has been achieved through the use of a suspended injector, which eliminates the NVH transmission path from the 350 bar FIS to the cylinder head. The cylinder pressure rise rate is precisely controlled through optimized combustion processes. Exceptional structural attenuation has been accomplished by optimizing all critical engine components. The inclusion of a Mass Balancer System (MBS) and Dual Mass Flywheel (DMF) further enhances vehicle-integrated NVH performance. Additionally, the die-cast aluminum timing cover, combined with an acoustic cover, significantly reduces engine noise emissions, aligning with the 2022 European pass-by noise regulations and meeting customer expectations.
GHE HP(High Performance Engine), the developing variant with high power, provides the customer demands for fun-to-drive with 100kw/liter specific power and 40%+ BTE. This engine applies soft Miller cycle, the same combustion configuration to GHE with 10.5 compression ratio, higher flow intake port, and mechanical water pump with thermal management system.
This paper describes the detailed system and sub-system configurations of GHE two engine variants, as the subsequent pater of ‘New Hybrid Engine Platform’ which has presented in 2024 KSAE annual spring conference in terms of development strategy, target, technology road map, system definition, etc.
목차
Abstract
1. Introduction
2. Engine concept, key components and features, key designed components
3. Conclusion
References
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