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To develop a control strategy for a vehicle, the most important factors are to minimize the cost in terms of time and resources, and availability of a risk-free test environment to test new strategies. This paper presents the strategy for developing control-based models for a plug-in hybrid vehicle. The resulting vehicle model will allow development of advanced supervisory control strategies for the...
Global automakers are accelerating the development of fuel efficient vehicles, as a part of meeting regional regulatory CO2 emissions requirements. The micro hybrid vehicles with auto start-stop functionality are considered economical solutions for the stringent European regulations. Flooded lead acid batteries were initially considered the most economical solution for idle-stop systems. However,...
As part of a number of Intelligent Transportation (ITS) applications aimed at providing an environmental benefit, eco-approach technology is one that is feasible in the near-term. An eco-approach application uses Signal Phase and Timing (SPaT) and intersection map information of signalized intersections to provide drivers with recommendations in order to encourage “green” driving while approaching,...
Speed is one of the main contributors to the occurrence and to the impact of road accidents. Intelligent Transport Systems can play a significant role in the improvement of traffic safety as well as the reduction of greenhouse gas emissions. Combining Intelligent Speed Assistance with limitation of the number of engine revolutions was expected to have positive effects. It was however unclear to what...
This paper demonstrates a methodology, based on stochastic dynamic programming, for developing a control policy that prescribes vehicle speed to minimize on average a weighted sum of fuel consumption and travel time, while travelling along the same route or a set of routes in a given geographic area. Given the current road grade, traffic speed and vehicle speed, the control policy prescribes an offset...
Southern California Edison (SCE) is an electric utility focused on providing clean, safe, reliable and efficient power to its customers. SCE is also active in improving vehicle fleet efficiency to reduce petroleum use and emissions. The Electric Vehicle Technical Center (EVTC) is operated by SCE for evaluation of electric and alternate fuel propulsion and energy storage systems for vehicles and fleet...
The paper introduces the instant fuel consumption detection system with AT89S8252 microcontroller at the core which detects the instant fuel consumption utilizing the fuel injector pulse width signal and speed transducer signal. Combined with instant fuel consumption and fuel consumption per hundred kilometer display in real time, the detection system features quick response and high precision in...
This paper introduced the theoretical model of calculating fuel consumption by carbon balance method. According to the problems which lead to examine fuel consumption toughly in automotive multiple-function test station, gasoline vehicle fuel consumption measurement model based on carbon balance method was established. In order to measure the carbon mass in the diluted exhaust gas, a new V-cone flow...
The theme is try to introduce the calculation software of fuel consumption for heavy truck which is based on Microsoft Access 2003 database management system and object-oriented visual programming language Visual Basic (VB) 6.0. It developed through the analysis of the important factors influencing heavy truck fuel consumption, the database of the actual running vehicle information, the compilation...
Fleet maintenance management is geared towards fleet owners who operate a sizable fleet of vehicles and to whom the maintenance and management of these assets is of critical importance. Preventive maintenance (PM) leads to more efficient operations and therefore substantial cost-savings and reduced pollution. A well designed PM program can extend the life of vehicles and equipment and reduce costly...
It is discussed that the active carbon canister performance has great importance for vehicle fuel evaporative emission control. Based on the limit of national standards for the performance test methods of the active carbon canister, virtual instrument test technology is applied to set up the test system. Remote network testing is implemented via Web Server technology and B/S network model which are...
This paper describes the process of prototyping and testing an in-vehicle embedded system which allows the driver to communicate with his vehicle, with the gadgets inside it (PDAs, cellular, sensor networks, and so on) and with the road infrastructure in order to consume intelligent transport services. The result of the presented work is an on board prototype and two services which have been developed...
In line with the testing requirements for vehicle fuel evaporative emissions by national testing agencies and the new national standard of GB14763-2005, a set of measuring and test system is developed. This article discusses the basic composition and working principle of the test system, and introduces development process of the testing software. It is verified that the test device has higher automation...
This paper presents an advanced testing system, combining hardware-in-the-loop (HIL) and machine vision technologies, for automated design validation testing of a vehicle instrument cluster. In the system, a HIL set-up supported by model-based approaches simulates vehicle network in real-time, and provides all essential signals to the instrument cluster under test. The machine vision system with novel...
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