Accessing the Knowledge Center effectively requires a simple, one-time registration.
Search Results (144)
The coupling of Advanced Gasoline Combustion and a fast-transient Boost System to produce a Low CO2 vehicle Concept
EU H2020 “Particle Reduced, Efficient Gasoline Engines” (PaREGEn) project targets CO2 reduction by at least 15% under upcoming EU6 RDE legislation. A lean combustion vehicle demonstrator, the concept and design studies of which are summarized in this paper, is one of the workstreams in the project. Specifics of boosting system sizing for such an advanced combustion powertrain are elaborated in detail for full- and partload conditions. Boosting system design for vehicle packaging is also introduced, as well as the upcoming activities outlook.
Impact of EGR and AFR Targets on Twin-Scroll Turbine MFR Optimization for Commercial Vehicle Diesel Applications
Divided turbines improve the efficiency of heavy-duty diesel engines by separating the blowdown events of consecutive cylinders, improving engine pumping and engine volumetric efficiency. Dividing the turbine housing leads to uneven flow between the two scrolls which can be characterized in terms of turbine mass flow ratio (MFR). An optimized turbine design needs to consider where the turbine energy is delivered with respect to MFR and improve turbine efficiency at the turbine operating points where most of the turbine energy is delivered. Three single-stage air handling architectures were compared based on their likelihood of adoption for US-24/EURO-VII engines: SCR-only, HP-EGR with Reed and asymmetric HP-EGR.
Electric Turbo | A key Technology for EU7
Strong Industry Macros with MHEV set to Grow Fast but need to overlay Regional, National and Local Targets
Air Quality
NOx for Diesel & Particulates for Gasoline
City Tolls, Parking Charges (& ICE Bans)
CO2 (Eu)
2020+ → 95g/km
2025 → 95g/km -15%
2030 → 95g/km -30%
Eu7 (2023+) | Gasoline example
No Scavenging → Risk to LET
Lambda 1 → Risk to Rated Power
RDE Full → Emission from t=0
Two-Stage Electric Fuel Cell Compressor
Increasingly stringent emissions regulations are promoting alternative energy sources like hydrogen, driving the development of fuel cell propulsion technologies. Garrett’s Two Stage electric compressor for fuel cells supports this innovative energy source, using a combination of aerospace and automotive technology.
Comparative system level assessment of different electric boosting architectures
Macro trends on increasingly stringent emission regulations, health concerns linked to air pollution in cities and 48 V penetration due to growing electric auxiliary demand at vehicle level are allowing penetration of electrified air-boosting systems. Such systems create new degrees of freedom and enable new optimization strategies for internal combustion engines.
Development of High Temperature Material Constitutive model for Thermo-Mechanical Fatigue (TMF) Loadings in Turbochargers
Turbochargers used for internal combustion engines experience severe transient loading conditions due to nature and variety of engine operating conditions. Turbine housing, a key component of a turbocharger collects hot exhaust gases from the engine and provides it to the turbine wheel and hence the kinetic energy needed for charging. Non-uniform temperature distributions, complex designs and mechanical loads induced by interactions with adjacent components subject turbine housings to multi-axial stresses which could lead to thermo-mechanical fatigue (TMF) and ultimately to cracks. Hence designing a turbine housing robust for thermomechanical fatigue poses a major challenge and it requires a very deep understanding about the material behaviors under various TMF loading conditions.
Improvement of Monoblock by-pass valve for sealing, controllability and catalyst light off
Garrett developed the first monoblock arm and valve in 2013 for durability, controllability and noise perspective. The first application was mono-scroll coupled with a pneumatic actuator. The global trend is to switch from pneumatic to electric actuator and the customer requirement to use monoblock with twin scroll turbocharger for durability perspective forced engineers to revisit the complete monoblock design.
The Potential of e-Boosting Technologies in the Context of WLPT and RDE
Summary and Outlook
Track history at Honeywell in Electrified Turbomachinery
electric Turbo and Turbo + eCharger systems both capable of doubling Torque at 1s
If high levels of ePower are available, Turbo + eChargercould have advantage over electric Turbo
If only moderate ePower available electric Turbo (0kWe) is equal to Turbo + eCharger (2kWe)
Millerization provides significant Fuel Economy improvement
electric Turbo can enable further Millerization and compensate for Transient response
electric Turbo offers Fuel Economy potential in RDE conditions with same or better Transient
electric Turbo can Recuperate both Turbocompound Energy and Rotor Kinetic Energy
electric Turbo has the potential to be SOC neutral or better
Combustion and Boosting synergies for WLTP and Beyond
Diesel
Honeywell remains committed to Diesel.
Mono, TwoStage & Electrified Solutions available for Eu6d (CF1,0+0,5)
Gasoline
MGT Gen 3 Launched in multiple applications in 2017
New ECO Gas engines are emerging eg. Miller / VNT is one solution in A, B & C segments
Cooler EGR, Water Injection & VCR also emerging. MGT Gen 4 is ready.
LEAN is posing new transient challenges as the next step in Gasoline Fuel Economy
Hybridisation
eCharger provides ultimate Performance and Fun to Drive (dependant on SOC)
eTurbo excellent transient enabler (Monostage) and high potential as LP Stage (TwoStage)
eTurbo with Advance Compressor competes with Turbo/eCharger system & Recuperates
The new 1.5l TSIevo gasoline engine from Volkswagen – Miller Cycle and Turbocharging with variable turbine geometry
In addition to meeting future emission regulations, a significant reduction in fuel consumption in real customer operations with a higher vehicle performance has been the driver for the development of the new EA211 TSI evo engine generation, As the first representative of the new generation, the 1.5l TSI evo engine starts and replaces the successful EA211 1.4l TSI 92kW series. The new 96kW engine is characterized by the Miller combustion process combined with an exhaust gas turbocharger with variable turbine geometry.
RDE and CO2 relevant Boosting Technologies for Passenger Cars
As more stringent emission and fuel economy legislation are implemented around the world it is evident that vehicles and powertrains will soon have significantly increased levels of Electrification. This paper introduces an advanced simulation study based on a 2.0L Gasoline engine. It compares the potential functionality and trade-offs between a baseline boosting system and two alternatives: one utilizing an electrically driven compressor (e-Charger™) and a wastegate turbo, and the other with an electrically assisted turbocharger system (e-Turbo) only. Steady-State, Transient and potential Fuel Economy in a reference RDE Cycle as well as a WLTC are considered.
