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SC-VNT™ a route toward high efficiency for Gasoline Engines
CO2 targets and anticipation of Eu7 Legislation is accelerating the widespread adoption of VNT turbochargers for Gasoline engines. VW set the industry best BSFC of 222 g/kWh when it released its 1,5L EA211 Miller engine with a Garrett GT12V in the Vienna Motor Symposium in 2017 [1,2]. Since this time engine ratings and VNT product ranges have been expanded and it is now expected that we will see new releases from several OEMs in multiple applications from 2020 onwards.
Electric Turbo, a Technology for Stoichiometric Combustion and Increased Efficiency
The next Euro 7 Emission Regulation will probably require gasoline engines to have full λ=1 combustion operation, in order to limit production of pollutants deriving from rich combustion. Since such operation will significantly limit engine output, few technologies as water injection, cooled exhaust EGR, variable compression ratio, integrated cooled exhaust manifold, Miller cycle with Variable Turbine Geometry and, more recently, electric turbocharger have gained visibility for the purpose of maintaining power density and displacement.
How a Turbo Works – Turbo Compressor Map – Expert Knowledge
This article will describe parts of the compressor map, how to estimate pressure ratio and mass flow rate for your engine, and how to plot the points on the maps to help choose the right turbocharger.
How a Turbocharger Works – Turbo Basic Knowledge Guide
Get to grips with the Garrett turbo basics covering blow-off valves, wastegates, oil and water plumbing, and journal bearings vs. ball bearings.
How a Turbo Works – Turbo Advanced Knowledge
Step up a level and explore wheel trim, turbine housing A/R and housing sizing, log-style vs. equal length manifolds, compression ratio with boost, and air/fuel ratio tuning: rich vs lean.
Hydrogen Fuel Cell Vehicles to Accelerate Electrification in the Global Auto Industry | Garrett Motion Whitepaper
Hydrogen fuel cell electric vehicles (FCEVs) will play a significant role alongside battery electric vehicles (BEVs) and plug-in hybrid electric vehicles (PHEV) in the global pursuit of zero-emission vehicles in the coming years. The auto industry is investing in a new powertrain revolution using electrification.
Electric Turbo Whitepaper | A key Technology for EU7 – Hybridized Powertrain (Lambda 1, Performance and Energy efficiency)
Hybrid Powertrains are growing in popularity around the world. The derivative known as Mild Hybrid using 48V Technology is gaining significant acceptance from OEM’s and customers throughout Europe, Asia and the Americas.
Electrified Turbocharging for Commercial Vehicle Engines, the Added Values
The integration of an electric motor generator to the shaft of turbochargers is an option Garrett is working on since high speed electrical machines made their appearance in aerospace. It has proved a success in F1 and endurance motorsport, in conjunction with the hybridization of those powertrains, because the E-Turbo strengthens both, the performance and the fuel efficiency of the engine. It introduces at the same time the controllability of the power equilibrium between compressor and turbine, an additional degree of freedom in the energy management.
Electric Turbo, a key technology for Hybridized Powertrain (Lambda 1, Performance and Energy efficiency)
The automotive world is undoubtedly in a period of flux. Urban air quality and climate change are the key drivers and new technologies such as zero emission, connected and autonomous vehicles are causing significant changes in the mobility landscape. Full electric vehicles (EV’s) are growing quickly on a percentile basis but require significant monetary and “in kind” incentives such as preferential city access, parking and exemption from life cycle CO2 counting, to stimulate adoption, at least in the short term. Legislation is also evolving rapidly. Real driving emission (RDE), the clean vehicle directive (CVD), CO2 monitoring and the still to be published Eu7 emission targets are being designed to transition the european fleet to one that can be measured and monitored firstly in terms of real world emission and ultimately in life cycle CO2 footprint. Change is not only taking place in automotive however. In the energy sector, the renewable energy directive (RED II) and the gas market design are the instruments with which the EU commission will steer the primary energy industries such as electricity and natural gas towards the goal of 90% reduction in CO2 by 2050. All these actions will take time to shape the individual industries but convergence will be well advanced by 2025 and by 2030 it should be possible to start comparing based life cycle CO2 in a meaningful way.
Electric Turbo Boosting – A key Technology for EU7 – Baden Baden 2019
Eu7 Mainstream Concept
Performance and CO2 potential at Eu7 Boundary Conditions
Lambda 1 980°C Full Map
16% Power & 10,5% Torque vs Baseline
4x Torque Gradient at 1500 rpm
Torque Consistency across Speed Range
> 60% Kinetic Energy Recovery in a Tip Out
True Recuperation still to be studied
Assessment of eBoosting on a Gasoline micro-Hybrid Passenger Vehicle
As emissions standards tighten, automotive manufacturers on every continent are quickening the pace on turbo uptake to develop passenger cars and trucks that redefine the concepts of fuel efficiency and performance. By 2020, it’s predicted that 70 percent of the entire light vehicles worldwide will be boosted by turbo technology, enabling millions of drivers to enjoy the benefits of impressive driveability, cost-effective emissions control and improved fuel efficiency.
