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Articles 1 - 6 of 6
Full-Text Articles in Engineering
Map-Aware Adaptive Automotive Radar, Jae Seung Lee, Nikola Steven Subotic, James Paul Ebling, Helen Kourous-Harrigan
Map-Aware Adaptive Automotive Radar, Jae Seung Lee, Nikola Steven Subotic, James Paul Ebling, Helen Kourous-Harrigan
Michigan Tech Patents
A dedicated short range radar system is provided for use with a GPS system. The radar system includes a transmitter which transmits a microwave radio signal. A receiver is coupled to a horizontally scanning receiver antenna array which receives an echo, if present, from the radio signal transmitted by the transmitter. The radio receiver then generates an output signal representative of the echo. A control circuit then receives the output signal from the antenna array as well as the output signal from the GPS system. The control circuit then varies the mode of operation of the receiver and/or the transmitter …
High Resolution Doppler Collision Avoidance Radar, Jae Seung Lee, Paul Donald Schmalenberg, Nikola Steven Subotic, James Paul Ebling
High Resolution Doppler Collision Avoidance Radar, Jae Seung Lee, Paul Donald Schmalenberg, Nikola Steven Subotic, James Paul Ebling
Michigan Tech Patents
An example radar apparatus has a transmission frequency modulated by a chirp waveform having three chirp segments, including increasing, decreasing, and a constant frequency segments. The chirp waveform may extend over the full revisit time of the radar beam. The frequency difference between the transmitted and echo signals are determined at least once per chirp segment. Example apparatus include a Doppler radar for vehicle use.
Modeling And Analysis Of Reactivity Controlled Compression Ignition (Rcci) Combustion, Mohammadreza Nazemi
Modeling And Analysis Of Reactivity Controlled Compression Ignition (Rcci) Combustion, Mohammadreza Nazemi
Dissertations, Master's Theses and Master's Reports - Open
Homogeneous Charge Compression Ignition (HCCI) and Premixed Charge Compression Ignition (PCCI) combustion strategies are promising methods for achieving low engine-out NOx and soot emissions as well as high indicated efficiency. However, these combustion strategies have difficulties with controlling the rate of heat release and lack of an adequate combustion phasing control mechanism. A dual-fuel Reactivity Controlled Compression Ignition (RCCI) combustion strategy will address these issues due to the existence of precise means for controlling the heat release rate and combustion phasing. In the RCCI strategy two fuels with different reactivity (auto-ignition characteristics, e.g., gasoline and diesel) are blended inside the …
Design And Implementation Of A Mobile Test Cell, Timothy J. Okkema
Design And Implementation Of A Mobile Test Cell, Timothy J. Okkema
Dissertations, Master's Theses and Master's Reports - Open
In this thesis, a modular powertrain mounting and instrumentation system is developed to increase engine testing efficiency in the Michigan Technological University Mobile Laboratory (Mobile Lab). This method is specifically designed for use in an on-the-road application with limited space where traditional engine test cell designs are not practical. This system is made to be robust, but simple enough that it can easily be built by future powertrain test engineers. In addition, a wall mounted diesel system was developed to provide common rail injection pressures to add the ability for conversion of mechanical injected diesel engines. And finally, an engine …
A Quantitative Investigation Of The Water Condensation Inside Tubes Of Compact Charge Air Cooler, Robin Cash
A Quantitative Investigation Of The Water Condensation Inside Tubes Of Compact Charge Air Cooler, Robin Cash
Dissertations, Master's Theses and Master's Reports
To address the need of increasing fuel economy requirements, automotive Original Equipment Manufacturers (OEMs) are increasing the number of turbocharged engines in their powertrain line-ups. The turbine-driven technology uses a forced induction device, which increases engine performance by increasing the density of the air charge being drawn into the cylinder. Denser air allows more fuel to be introduced into the combustion chamber, thus increasing engine performance. During the compression process, the air is heated to temperatures that can cause pre-ignition, resulting in reduced engine functionality. The introduction of the charge air cooler (CAC) is therefore, necessary to extract heat from …
Physics-Based Modeling And Control Of Powertrain Systems Integrated With Low Temperature Combustion Engines, Mehran Bidarvatan
Physics-Based Modeling And Control Of Powertrain Systems Integrated With Low Temperature Combustion Engines, Mehran Bidarvatan
Dissertations, Master's Theses and Master's Reports
Low Temperature Combustion (LTC) holds promise for high thermal efficiency and low Nitrogen Oxides (NOx) and Particulate Matter (PM) exhaust emissions. Fast and robust control of different engine variables is a major challenge for real-time model-based control of LTC. This thesis concentrates on control of powertrain systems that are integrated with a specific type of LTC engines called Homogenous Charge Compression Ignition (HCCI). In this thesis, accurate mean value and dynamic cycleto- cycle Control Oriented Models (COMs) are developed to capture the dynamics of HCCI engine operation. The COMs are experimentally validated for a wide range of HCCI steady-state and …