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RESEARCH PROGRAM

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Research Units
Similar research programs:
Scientific and education field classification
International Patent Classification
  • MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
    • FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
      • SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR ([N: hydraulically or pneumatically operated lifting devices for soil-working machines A01B63/10; hydraulic drawing presses B21D; hydraulic or pneumatic manipulators B25J; hydraulic or pneumatic tipping devices for vehicles B60P1/00; hydraulic or pneumatic remote control for railway signals B61L7/04; hydraulic or pneumatic mine supports E21D15/44]; motors, turbines, compressors, blowers, pumps F01 to F04; [N: fluid signal amplifiers, relays F15C]; fluid dynamics F15D; fluid clutches or brakes F16D; fluid springs F16F; fluid gearing F16H; pistons, cylinders packing F16J; valves, taps, cocks, actuating-floats F16K; safety valves with auxiliary fluid operation of the main valve F16K17/10; fluid-operating means for valves F16K31/12; pipes, pipe joints F16L; lubricating F16N)
    • STORING OF DISTRIBUTING GASES OR LIQUIDS (water supply E03B)
      • VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25)
  • PERFORMING OPERATIONS; TRANSPORTING
    • VEHICLES IN GENERAL
      • VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
Geographical classification
Keywords
AUTOMOTIVE ENGINEERING,GENERAL; BUSES, TRUCKS AND VEHICLE TRACTION; AUTOMOBILES; HYDRAULICS,PNEUMATICS AND RELATED EQUIPMENT; PNEUMO-HYDRAULIC STORAGE; KINETIC ENERGY RECOVERY; REGENERATIVE BRAKING; FUEL SAVING; AIR POLLUTION REDUCTION

RECOVERY OF VEHICLE KINETIC ENERGY BY MEANS OF PNEUMO-HYDRAULIC STORAGE SYSTEMS

Università degli Studi de L'Aquila
Abstract
The research program is mainly devoted to develop systems for recovery the kinetic energy wasted by vehicles when brake or are moving at constant velocity on descent. The considered systems are of hydro-pneumatic kind, fitted to realize assistance during vehicle accelerations.
Dynamic simulation of the vehicle with an on board HLA system is developed. Considering different mission profiles, the simulations will allow to analyse the system behaviour from the energy point of view, highlighting the most important advantages. Another mathematical model is defined for the dynamic simulation of the experimental set-up, oriented to get useful information about the control of the system and the management strategy of the recovery process and of the stored energy. Contemporaneously, thermodynamic analysis of pressurised gas cylinders for energy accumulation is developed.
The design and manufacturing of a particular test-bench is undertaken; this test-bench is useful for the definition of components suitable for a future application on a public transport vehicle as big as a minibus and for experimental investigation of charging and discharging cycles of the hydro-pneumatic accumulators.
The research carries on with the definition and experimental evaluation of innovative configuration of hydraulic components (valves) and of the whole recovery system; the purpose is to develop mechanical solutions suitable for small vehicles as well, that would further reduce >>>

Principal Investigator
Enrico CHIAPPINI Università degli Studi de L'AQUILA
Research Objectives
The research concerns problems of road transport of people and merchandise, in congested traffic conditions (typical of urban contest). The main goals to achieve are:
• fuel consumption reduction or, in any case, reduction of the energy requested by movement
• air pollution reduction
and, strictly connetected with them, two other secondary goals may be underlined:
• improvement of braking system durability with, as consequence, reduction of maintenance costs
• opportunity of engine downsizing or, as choice, of improving vehicle acceleration.
The research means to realize such goals developing hydro-pneumatic storage systems which are able to recover the kinetic energy wasted by vehicle when their velocity is reduced. As consequence, the main goals will be considered achieved when some particular objectives, characteristic of physical and technological problems involved by the used recovery storage systems, will be realized.
In particular, these specific mains may be underlined.
• Mathematical Model Building: Dynamic simulation of the vehicle with an on board HLA system. Considering different mission profiles, the simulations will allow to analyse the system behaviour from the energy point of view, highlighting the most important advantages; definition of a mathematical model for the dynamic simulation of the experimental set-up oriented to get useful information about the control of the system and the management >>>

Timescale
24 months
National and international background
As widely underlined in the press and communication campaigns the atmospheric pollution in urban areas becomes every day more relevant, and this is even more critical in large cities, with relevant repercussions for citizen's health, building conservation and even more for art masterpieces. The air conditions are often above the limit values established as dangerous (due to the presence of NOx and or fine particulate PM10). Therefore, the local administrations – considering that most of the urban pollution is produced by vehicles – are forced to intervene with acts that limit vehicle circulation. Areas with limited traffic are created, the circulation is limited on the base of plate number and, furthermore when most serious conditions appear, the vehicle circulation is forbidden.
This situation, if on one side undoubtedly makes it more difficult for car companies to sell their products, on the other side it is a powerful incitement to the development of less polluting vehicles that could then respond to the more and more stringent requirements of exhaust gas emission containment imposed by the actual and future regulations. The efforts made to improve control of intake and combustion process have seen the advent of the direct and common rail injection and on the other hand the utilisation of cleaner fuels like methane and hydrogen.
The automotive firms are making great economical and design efforts in realising more efficient engines to comply with the required >>>