Search Results

Laser Doppler velocimetry, phase Doppler anemometry and Mie scattering were applied to a single-cylinder, four-valve, spark-ignition gasoline research engine equipped with a fully transparent liner and piston, to obtain information about the tumble flow and the droplet size and velocity distributions during induction and compression, for lean air/fuel mixture ratios of 17.5 and 24 and with closed-valve and open-valve fuel injection. The mixture distribution obtained with the two injection strategies was correlated with flame images, pressure analysis and exhaust emissions which confirmed the advantages of combining open-valve injection with tumble to allow stable and efficient engine operation at an air/fuel ratio of 24 through charge stratification and faster flame growth.

A Telematics System is an end-to-end system that delivers personal communications, safety and security, entertainment and information services to a vehicle with a location specific context. Typical service examples include Emergency Call, Roadside Assistance, Fleet Management, Yellow Pages and Real-time Vehicle Diagnostics. Telematics has wide ranging benefits for a number of different industry participants. For a telecommunications operator, Telematics may provide the necessary paradigm shift to grow the wireless data market whilst leveraging existing infrastructure. For vehicle manufacturers, it offers the opportunity to obtain an ongoing revenue stream while enhancing both standard and after-market product lines. For regulators, there is a progression towards intelligent transportation systems and their associated benefits of pollution reduction, reduced transit times, and reduced road fatalities.