The New BMW Six-Cylinder Diesel Engine with Three Turbochargers

Eidenböck, Thomas; Mayr, Karl; Neuhauser, W; Staub, Peter

doi:10.1007/s38313-012-0222-6

Cited by 7 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recent engine designs make greater use of chamfers in the cylinder head, which help increase the swirl generated at low valve lifts and reduce interference between the flows from the two intake ports. 14,37,38,62,63 Consequently, flow loss considerations are becoming less important. Flow swirl can adversely affect fuel economy despite more rapid combustion due to increased heat losses.…”

Section: Swirl Levelmentioning

confidence: 99%

A review of design considerations for light-duty diesel combustion systems

Miles

Andersson

2015

International Journal of Engine Research

View full text Add to dashboard Cite

Practical aspects of light-duty diesel combustion system design are reviewed, with an emphasis on design considerations reported by manufacturers and engine design consultancies. The factors driving the selection of compression ratio, stroke-to-bore ratio, and various aspects of combustion chamber geometry are examined, along with the trends observed in these parameters in recently released engines. The interactions among geometric characteristics, swirl ratio, and the fuel injection nozzle parameters are also reviewed.

show abstract

Section: Swirl Levelmentioning

confidence: 99%

A review of design considerations for light-duty diesel combustion systems

Miles

Andersson

2015

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…Torque estimation is an incredibly complicated task due to the considerable number of design, environmental and control parameters that impact the engine performance. Modern engines have a variety of controllable parameters which will each affect the torque of the engine, ranging from the basics such as throttle position, ignition timing and fuel injection timing to more innovative technologies such as VCT, EGR and multiple-stage turbocharging [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Automated engine calibration validation for real world driving conditions

Fletcher

Kalantzis

Cary

et al. 2020

IJPT

View full text Add to dashboard Cite

With the introduction of the Worldwide Harmonised Light Vehicles Test Procedure (WLTP) and Real Driving Emissions (RDE) legislative tests, it has become imperative for automotive manufacturers to verify that their vehicles operate reliably and efficiently across a wide range of operating conditions. Engine air charge control and torque delivery should be consistent, smooth, and predictable to the operator, despite disturbances induced by technologies designed to improve efficiency and reduce emissions such as Variable Cam Timing (VCT), Exhaust Gas Recirculation (EGR) and forced induction. This is of particular importance to hybrid and Advanced Driver-Assistance Systems (ADAS)-enabled vehicles which require accurate control of the engine torque. The torque strategy validation is an iterative process which can be very time-consuming, expensive and requires considerable experience in order to adjust the calibration to meet validation requirements whilst maintaining accuracy with regards to the original characterisation data. This paper describes development and introduction of an automated validation process at the Ford's Dunton Technical Centre in the UK. The algorithm was developed and tested in conjunction with a co-simulation environment, and both simulated and experimental results are presented. The automated procedure has been shown to reduce validation process time by around 50% resulting in significant cost saving whilst improving the overall accuracy of the calibration by around 30-50% depending on the engine programme.

show abstract

“…1–3 The flora of boosting system layouts is increasing. 4 Currently, for example, series sequential, 5–7 parallel sequential systems, 8 sequential series and parallel systems, 9 or a combination of turbo and mechanical compressor are in production. Both more stages 10 and the inclusion of electric machines connected to a turbo or mechanical compressor shaft are investigated.…”

Section: Introductionmentioning

confidence: 99%

Measurement, analysis and modeling of centrifugal compressor flow for low pressure ratios

Leufvén

Eriksson

2014

International Journal of Engine Research

View full text Add to dashboard Cite

Increasingly stringent emission legislation combined with consumer performance demands has driven the development of downsized engines with complex turbocharger arrangements. To handle the complexity, model-based methods have become a standard tool, and these methods need models that are capable of describing all operating modes of the systems. The models should also be easily parametrized and enable extrapolation. Both single- and multi-stage turbo systems can operate with a pressure drop over their compressors, both stationary and transient. The focus here is to develop models that can describe centrifugal compressors that operate in both normal region and restriction region from standstill to maximum speed. The modeling results rely on an analysis of 305 automotive compressor maps, whereof five contain measured restriction operation and two contain measured standstill characteristic. A standstill compressor is shown to choke at a pressure ratio of approximately 0.5, and the corresponding choking corrected mass flow being approximately 50% of the compressor maximum flow capacity. Both choking pressure ratio and flow are then shown to increase with corrected speed, and the choking pressure ratio is shown to occur at pressure ratios larger than unity for higher speeds. Simple empirical models are proposed and shown to be able to describe high flow and pressure ratios down to choking conditions well. A novel compressor flow model is proposed and validated to capture the high flow asymptote well, for speeds from standstill up to maximum.

show abstract

The New BMW Six-Cylinder Diesel Engine with Three Turbochargers

Cited by 7 publications

References 1 publication

A review of design considerations for light-duty diesel combustion systems

A review of design considerations for light-duty diesel combustion systems

Automated engine calibration validation for real world driving conditions

Measurement, analysis and modeling of centrifugal compressor flow for low pressure ratios

Contact Info

Product

Resources

About