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Technical Paper

Macroscopic and Ignition Characteristics of High-Pressure Sprays of Single-Component Fuels

1998-02-23
981069
Using a combination of imaging techniques, we have produced a database of the macroscopic properties of sprays produced by a common-rail injection system in a diesel simulation cell. The parameters of the data base include injection pressure (40, 80 and 150 MPa), gas-side temperature (387, 800 and 1100 K), gas density (12, 25 and 30 kg/m3), injector nozzle hole size (0.17 and 0.20 mm) and injection programs (with and without pilot injection). Single component fuels (heptane and dodecane) were used in order to simplify data interpretation and modeling. The spray characteristics which were measured include the initial “dispersion” angle of the nozzle, initial spray tip speeds, and spray tip penetration vs. time for both the liquid and vapor parts of the spray. The sites of initial self ignition and combustion propagation within the sprays were visualized, and a luminous delay was measured for several of the operating conditions.
Article

Imaging radar is the next big thing

2022-01-24
The sensor technology is designed to bridge some of the gap between current-generation radar and lidar – while retaining the traditional advantages of RF-based sensors.
Article

Canada’s Highway 407 ETR tests high contrast AV highway markings

2019-07-29
407 Express Toll Route Concession Company Limited is optimizing kilometers of Canadian highway for automated vehicles (AVs) in partnership with 3M Canada. 407 ERT has applied high-contrast 3M pavement marking tapes for Advanced Driver Assistance Systems (ADAS) on lanes on Canada’s Highway 407 ETR.
Article

Beep and Bestmile partner on self-driving fleets in Florida

2019-08-19
Beep Inc., an automated vehicle (AV) distributor based in Orlando, Florida, is partnering with Bestmile SA – a developer of fleet orchestration software. Through the collaboration, Beep will use Bestmile’s software to manage and monitor autonomous shuttle fleets that it sells to fleet owners who operate in low speed environments across the public and private sector.
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