The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Plug-in hybrid electric vehicle (PHEV) presents the new trend of clean energy vehicle development due to their advantage of all electric driving, allowable external charging, lower emissions, and lower petroleum fuel consumption, comparing to the maturing HEV. Applications of advanced plug-in hybrid powertrain system technology to different type of vehicles lead to the need to identify the key characteristics...
This article proposes a strategy which works on the fuel consumption / pollutant compromise with a gasoline Hybrid Electric Vehicle (HEV). First, a pollutant-constrained optimal energy management is derived from the Pontryagin's Minimum Principle (PMP). Using only one parameter and considering standardized pollutant emissions, this approach is validated on a high-fidelity HEV model. Then, an online...
This paper is concerned with power management strategy of hybrid electric vehicle. Dynamic programming based power split ratio line control strategy is studied for parallel type hybrid electric vehicle to improve fuel economy performance. Dynamic programming, one of the optimization based control strategy, is powerful tool to provide optimal solution for hybrid electric vehicle's power management...
Electric vehicles can potentially be the best means of transportation for improving air quality, provided that they are powered by electricity from natural gas or wind, water or solar power. In this paper we describe a simple cooperative algorithm that exploits the energy management units of Plug-in Hybrid Electric Vehicles (PHEVs) to absorb the expected forthcoming energy available from renewable...
Ramjet is the main power unit of supersonic aircraft with air-breathing method, where the pressure pulsation of the combustion chamber is a significant type of media to assess the engine operating condition and check the noise source of the engine. This paper aims to process the pressure pulsation signals obtained from the combustion chamber based on wavelet packet decomposition (WPD). The original...
This study is mainly concerned with fuel efficiency modeling and prediction for common automobiles based on an informative vehicle database. The historical database is processed and the mutual information index (MII) is employed to identify a set of characteristics that significantly affect fuel efficiency. Five different machine learning techniques are exploited to build fuel efficiency prediction...
Development of internal combustion engine control system is currently oriented on exhaust emissions, performance and fuel efficiency. This is caused by fuel prices rising which led to a crisis on the transport sector; therefore it is crucial to develop a fuel-efficient vehicles technology. Gasoline engine fuel efficiency can be improved by several methods such as by controlling the air-to-fuel ratio...
Recently, more and more vehicles are running on the road, which causes fuel consumption and environmental pollution problems. As a significant factor to the fuel consumption, road grade is often neglected in the vehicle energy consumption model and the decision of optimal path of the vehicle navigation system because of the difficulty of its collection and measurements. This work demonstrates the...
This paper deals with the problem of damping driveline oscillations, which is crucial to improving driveability and passenger comfort. This problem has received an increased interest due to the introduction of the dual-clutch powershift automatic transmission with dry clutches. This type of transmission improves fuel economy, but it results in a challenging control problem, due to driveline oscillations...
Supervision and control of Autonomous underwater vehicles (AUVs) has traditionally been focused on an operator determining a priori the sequence of waypoints of a single vehicle for a mission. As AUVs become more ubiquitous as a scientific tool, we envision the need for controlling multiple vehicles which would impose less cognitive burden on the operator with a more abstract form of human-in-the-loop...
Data exchange between vehicles and base stations may contain information on traffic accidents, traffic jams, road constructions etc. Risks to data privacy in vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) systems need be minimized. We present a policybased solution that provides controlled and privacypreserving dissemination of video data in V2V and V2I. This policy-based solution relies...
The attitude of the strap down inertial navigation system (SINS) in static base with respect to the Earth can be obtained directly using the TRIAD algorithm given two vector measurements. This is usually called analytic coarse alignment method in which all six outputs from the SINS are used to compute the attitude. In this study, we present a novel analytic alignment method called selective alignment...
This paper is concerned with supercapacitors (electrochemical capacitors) and their applications in electric drive vehicles in place of or in combination with batteries. The electric drive vehicles considered are hybrid vehicles. Data are presented for the new carbon/carbon device from Skeleton Technologies showing an energy density of 9 Wh/kg and 95% efficient power capability of 1730 W/kg. Both...
Nowadays, digital surveillance systems are ubiquitously installed and continuously generating huge amount of video data. More often than not, it requires human to identify potential threats. To address that problem, we propose a Platform-as-a-Service (PaaS) architecture to conduct large scale video analysis in more systematic and efficient ways. In addition, the video analysis application implemented...
A model of compression combustion noise is set up to simulate combustion waves from chamber, which is validated at test bench. The major Influence factors of combustion waves are optimized and proved at test bench and in the anechoic chamber. Test result shows that injection control strategy including multi-injection, single pilot injection and double pilot has remarkable influence on compression...
Platoon driving is critical to improve safety, efficiency, and fuel economy. This paper presents a control method for heterogeneous vehicular platoons with uncertain dynamics and uniform communication delay. The requirements of string stability, robustness and tracking performance are measured by H-infinity norm and satisfied by casting into a linear fractional transformation (LFT) format. A delay-dependent...
Co-site interference is becoming an increasingly significant issue in electronic vehicular systems. Military system designers are facing challenges due to the ever increasing demand for more sophisticated, higher performance communication systems on one hand, and the need for high mobility in congested electromagnetic environments on the other. Solutions to mitigate the electromagnetic environment...
It is complex and difficult to perform the rescue vehicle scheduling to handle forest fires in order to reduce the operational cost and improve the efficiency of fire-extinguishing services. A new research issue arises when a) decision-makers want to minimize the number of rescue vehicles while minimizing the rescue time; and b) decision-makers prefer to complete the fire-extinguishing task fast given...
Hydraulic power assist (HPA) vehicle control strategy is always a hotspot in the field of hybrid vehicle research. To improve the HPA vehicle entire fuel consumption efficiency, many researches have been done to make the energy recovery rate higher. Well, according to the engine's fuel consumption curves, the fuel consumption does not proportion to the energy requirement, which means the energy recovery...
The traffic congestion in modern cities deteriorates urban bus' fuel economy and pollutes the atmosphere seriously, Hydraulic hybrid system becomes one of the efficient ways to improve motor's fuel economy and reduce its pollution under the frequent starts and stops. In order to improve the power performance, a front located parallel hydraulic hybrid (FPHH) configuration is proposed. Through dynamic...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.