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Intake manifold primary trumpet tuning options for fuel flow limited high performance ICEs

Ferrari Gestione Sportiva-Angelo Rosetti, Corrado Iotti
University of Modena e Reggio Emilia-Giuseppe Cantore
  • Technical Paper
  • 2019-24-0005
To be published on 2019-08-15 by SAE International in United States
The 2014 change in Formula 1 power units, from naturally aspirated to highly-downsized and heavily-boosted hybridized power units led to a relevant increase of the internal combustion engine brake specific power output in comparison with former V-8 units. The newly designed “down-sized” engines are characterized by a fuel flow limitation and relevant increase in the thermal loads acting on the engine components, in particular on those facing the combustion chamber. Furthermore, efficiency becomes an equivalent paradigm as performance. In the power unit layout, the air path is defined by the compressor, the intercooler and the piping from the intake plenum to the cylinder. Intake duct length is defined from intake plenum to valve seat and it is a key parameter for engine performance. In order to find the optimum length different design criteria can be applied: the so –called “tuning”, the so-called “un-tuning” or the so-called “anti-tuning” are all valid possibilities, showing pros and cons. The scope of the paper is to study and present the possible different tuning options for the ICE part of…
 
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Fastener Hardware for Wheels for Demountable Rims

Truck and Bus Wheel Committee
  • Ground Vehicle Standard
  • J1835_201906
  • Current
Published 2019-06-17 by SAE International in United States

This SAE Recommended Practice establishes the mounting hardware to be used with demountable rims, wheels for demountable rims, rim spacers designed for 28 degrees bevel mounting systems, and intended for use on commercial vehicles. The dimensions given are those necessary to maintain serviceability and interchangeability of mounting hardware.

 
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Performance Testing and Analysis of Multi-Channel Active Control System for Vehicle Interior Noise Using Adaptive Notch Filter

Tongji University-Lijun Zhang, Xiyu Zhang, Dejian Meng
Published 2019-06-05 by SAE International in United States
It is considered that slow convergence speed and large calculation amount of commonly used adaptive algorithm in the active control system for vehicle interior noise yield noise reduction performance and hardware requirements problems. In this paper, a 4-channel active control of vehicle interior noise based on adaptive notch filter is established, and road test is carried out to test and analyze the performance of the control system. Firstly, the general mathematic model of the multi-channel active control system based on adaptive notch filter is established. The computational complexity of the algorithm is analyzed and compared with that of the FXLMS algorithm. Secondly, a hardware-in-the-loop test bench based on multi-channel adaptive notch filter is set up, to measure the noise reduction performance of ANC system under various working conditions. Finally, the typical test conditions are designed to test the system noise reduction performance, and the road test is carried out and result is analyzed.
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Eyes in the Sky

Aerospace & Defense Technology: June 2019

  • Magazine Article
  • 19AERP06_01
Published 2019-06-01 by SAE International in United States

Rugged High-Speed Cameras Capture Critical Flight Test Video Data

There is increasing demand for high-quality High Definition (HD) video for airborne applications such as Flight Test Instrumentation (FTI). Ideally, such new camera solutions can reduce the weight and difficultly of installing wiring, and enable data to be coherently combined with image data. Ethernet cameras can address these needs with built-in compression and multiple output streams. Additionally, as Ethernet-based networks have become an attractive choice for FTI applications, we see increased requirements for integrating Ethernet-based cameras with FTI data acquisition equipment, network recorders, and telemetry systems as this removes duplication of wiring and devices.

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Detection of Potholes and Speedbumps by Monitoring Front Traffic

Manipal Institute of Technology-Amit Jindal
Mercedes Benz R&D India-Karthikeyan Nagarajan
Published 2019-04-24 by SAE International in United States
This article proposes a novel method for detecting potholes and speed bumps by monitoring the front traffic when the road is not visibly seen. The existing camera-based systems in the car directly scan the road surface and estimate the road profile. The main disadvantage of the current technology is that it is not possible to detect the road profile when the road is not clearly visible. This can happen in situations when roads are waterlogged or have occluded bumps and in low light conditions. In thisarticle, the proposed method for detecting potholes or speed bumps by monitoring the vertical movement of the front traffic can enhance the existing algorithm by overcoming the abovementioned disadvantage. However, the method works only when there is traffic ahead of the system vehicle. The method makes level 3 and above autonomous driving more robust in terms of comfort and safety by estimating the road profile in the abovementioned road conditions. The method uses an object localization algorithm and optical flow to determine the motion vectors of vehicles. The histogram of…
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Service Brake Structural Integrity Requirements—Truck and Bus

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J1404_201904
  • Current
Published 2019-04-24 by SAE International in United States
This SAE Recommended Practice presents requirements for the structural integrity of the brake system of all new trucks, buses, and combinations of vehicles designed for roadway use and falling into the following classifications: a Truck and Bus—Over 4500 kg (10 000 lb) GVWR b Combination Vehicles—Towing vehicle over 4500 kg (10 000 lb) GVWR The requirements are based on data obtained from SAE J294.
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CONNECTOR ACCESSORIES, ELECTRICAL BACKSHELL, 45°, NON-SELF LOCKING AND SELF LOCKING, MS “V” THREAD, CATEGORY 3B (FOR MIL-DTL-83723 SERIES III, AS50151 SERIES II AND III, AS81703 SERIES III, MIL-DTL-26842 SERIES II AND AS95234 CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS85049/145B
  • Current
Published 2019-04-23 by SAE International in United States
No Abstract Available.
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CONNECTOR ACCESSORIES, ELECTRICAL BACKSHELL, STRAIGHT, NON-SELF LOCKING AND SELF LOCKING, MS “V” THREAD, CATEGORY 3B (FOR MIL-DTL-83723 SERIES III, AS50151 SERIES II AND III, AS81703 SERIES III, MIL-DTL-26482 SERIES II AND AS95234 CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS85049/144B
  • Current
Published 2019-04-22 by SAE International in United States
No Abstract Available.
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CONNECTOR ACCESSORIES, ELECTRICAL, BACKSHELL, NONENVIRONMENTAL, SPLIT 90°, EMI/RFI SHIELDED TERMINATION, CATEGORY 3B (FOR MIL-DTL-38999 SERIES I AND II CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS85049/37C
  • Current
Published 2019-04-11 by SAE International in United States
No Abstract Available.
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Implementation of a 0-D/1-D/3-D Process for the Heat Release Prediction of a Gasoline Engine in the Early Development Stage

Ricardo UK Ltd.-Kenan Mustafa, Nicholas Winder, Richard Osborne
University of Brighton-Robert Morgan, David Mason, Morgan Heikal
Published 2019-04-02 by SAE International in United States
The automotive market’s need for ever cleaner and more efficient powertrains, delivered to market in the shortest possible time, has prompted a revolution in digital engineering. Virtual hardware screening and engine calibration, before hardware is available is a highly time and cost-effective way of reducing development and validation testing and shortening the time to bring product to market. Model-based development workflows, to be predictive, need to offer realistic combustion rate responses to different engine characteristics such as port and fuel injector geometry. The current approach relies on a combination of empirical, phenomenological and experienced derived tools with poor accuracy outside the range of experimental data used to validate the tool chain, therefore making the exploration of unconventional solutions challenging. An alternative method that is less data and user experience dependent, is therefore needed to enable radical improvements in performance to be delivered without compromising the time to market.In this work, a pragmatic engine development process using a combination of a 0-D combustion Stochastic Reactor Model (SRM) provided by LOGESoft and non-combusting ‘cold’ CFD is used.…
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