Hicks, pe is a consulting engineer and a successful engineering book author, with more than 20 titles to his credit. In some advanced systems, a hydraulic transformer is included in order to convert output flow at any pressure. Introduction to how hydraulic hybrids work howstuffworks. List of presentations at public committee meetings get this book visit nap. Optimal design of a powersplit transmissions for hydraulic. For trucks and buses, this can also be less expensive than electric systems, due. Research on modeling, simulation and control of new type. A bond graph approach to hydraulic hybrid vehicle article pdf available. Similar to electric hybrids, hydraulic hybrids are either series or parallel. While the hydraulic hybrid garbage haulers were laboring way, loveland, colo. Hydraulic hybrid series 12 urban delivery truck hybrids through retrofitting hybrid assist hydraulic hybrid.
The hydraulic hybrid line provides very high power density. Pdf hydraulic hybrid propulsion for heavy vehicles. The accumulators are used to store pressurized fluid. Hydraulic hybrids can do this much more efficiently and effectively than electrical hybrids, which use batteries for the purpose.
Dec 11, 2007 9a hydraulic drive system to convert the stored energy to motive power hydraulic hybrids store energy in hydraulic accumulators use hydraulic pumpmotors electric hybrids store energy in batteries andor ultracapacitors use electric generatormotors hydraulic hybrids store energy in hydraulic accumulators use hydraulic. Center documents that hydraulic hybrids have the potential to perform three times more efficiently than electric hybrids. In the first two cases, the energy conversion unit may be powered by gasoline, methanol, compressed natural gas, hydrogen, or other alternative fuels. Optimal design of powersplit transmissions for hydraulic. Another hybrid option has been put forth and tested by a number of businesses, as well as the environmental protection agency epa. Prior to the establishment of the astm test, a similar method, epa 9100, was utilized. Hydraulic hybrid vehicles california clean air technology. Hydraulic parallel and series hybrids an interesting difference between the electric and the hydraulic system is that in the hydraulic system there is no need for a gearbox between the hydraulic motor and the driving wheel. Pdf a bond graph approach to hydraulic hybrid vehicle. May 29, 2008 hydraulic hybrids however, hydraulic hybrid systems are perfect for vehicles running at relatively low speeds. Demonstrates the ease of retrofitting trucks with hydraulic hybrid technology.
Vehicles adopting this new technology have experienced up to a 50% reduction in fuel consumption on a typical route with ancillary benefits including significantly reduced carbon emissions, less brake wear and ease of driving compared with other hybrid systems. Fenton useful reading and reference material historical works garbrecht, g. Hydraulic hybrid engineoff when truck decelerating or not moving 52% 59% 15. Are hydraulic hybrid vehicles the future of driving. In some systems, a hydraulic transformer is also installed for converting output flow at any pressure with a very low power loss. Series hydraulic hybrid lightweight duty vehicle design. Introduction to hybrid vehicle system modeling and control. Elizabeth john office manager advanced fuel production office kevin barker. Explore hydraulic hybrid vehicle with free download of seminar report and ppt in pdf and doc format. John kargul, epa clean automotive technology program, epas hydraulic hybrid program washington, d.
At first, the structure of new ers that combines the advantages of an electric and hydraulic accumulator is analyzed. Hydraulic hybrids operate basically the same way as gasolineelectric hybrids, but they use a motorpump instead of an electric motorgeneratorand an accumulator rather than the battery pack. This video explains the benefits of hydraulic hybrid vehicle or hhv technology. They capture and reuse 7080% of the vehicles brakingdecelerating energy compared to 55% for electric hybrids. Differences between heavyduty and lightduty hybrids. Commonly used by trucks, buses with frequent stops. Hydraulic hybrids use many of the same principles as electric hybrids, but instead of using potentially pollutive and heavy batteries, they use lightweight components and clean fluid to power. Bonnie trowbridge, company spokesperson, said that sales were promising in england, so moved from its office outside londonwhich was established in 2015.
Hydraulic conductivity test methods and equipment laboratory hydraulic conductivity testing astm d 508490 is the standard test method currently used by the industry for determination of laboratory hydraulic conductivity. A recent trend in the development of offhighway construction equipment, such as excavators, is to use a system model for modelbased system design in a virtual environment. The two basic concepts of hydraulic hybrids are shown in fig. In this new concept, the complete mechanical transmission of a car is replaced by a full hydrostatic transmission, allowing energy recuperation and an efficient operation. This hhv was able to achieve 50180% better mpg over various urban stopgo drive cycles and 30% better mpg over the epa highway cycle in chassis dynamometer testing. Request pdf on aug 1, 2011, jiuyu du and others published research on modeling, simulation and control of new type power split hybrid powertrain find, read and cite all the research you need. Read on to learn exactly how hydraulic hybrids work, how they compare to electric hybrids and how theyre being used today. Hence, fuel economy is highly dependent on the efciencies of the hydraulic components. Innovation that works affordable advanced technologies.
Hydraulic hybrid vehicle demonstration california energy. In the first case, the ice is a spark ignition engines gasoline or compression ignition direct injection diesel engine. The information from this project contributes to piers transportation program. In todays dollars, the net lifetime savings of this technology in a typical ups. Parallel hybrids, in contrast, are advantageous that a signi. The hydrid is a hydraulic hybrid drive train for both road vehicles and off road machinery. Hydraulic hybrids, however, lack the extra batteries needed to power electrical systems when the engine turns off. The pressure is on as ups adds more hydraulic hybrids wired. This hydraulic hybrid technology should be evaluated carefully so that it is applied to the right applications to insure optimal commercial performance. Kargul, hydraulic hybrids, demonstartion for port yard hostlers. The hydraulic component of the engine consists of a low pressure reservoir, a.
Parallel hybrids, in contrast, are advantageous that a signicant portion of the power is transferred through the highly efcient mechanical path. Hybrid parallel full hydraulic hybrid series 12 urban delivery truck hybrids through retrofitting hybrid assist hydraulic hybrid. In this paper model of hydraulic hybrid vehicle is presented. Shows ability to get low hanging fruit 2030% mpg improvement epas f550 fleet retrofit demonstration vehicle with hydraulic. He has worked in plant design and operation in a variety of industries, taught at several engineering schools, and lectured both in the united states and abroad. Eaton to begin providing hydraulic hybrid retrofit kit in 2010. Requirements for heavyduty hybrid vehicles are significantly. Pdf the global energy situation, the dependence of the transportation sector on fossil fuels. Recent trends hydraulic hybrid vehicles ankush menat 2.
Acting as a motor, the hydraulic drive uses the pressurized fluid to rotate the wheels. Hydraulic hybrid research clean automotive technology. Epa has cooperative research and development agreements. In a hydraulic hybrid, pressurized fluid is used as secondary source of power. Hydraulic hybrids are able to capture and reuse 7080% of the otherwise wasted braking energy. John duffy, senior project engineer, kenworth truck company michele duhadway, marketing specialist, bosch rexroth corporation vincent duray, product planning manager. The unique integrated hydraulic drive module and its transmission in a series hydraulic hybrid vehicle hhv configuration were installed in a 30foot class 6 diesel midibus. Hydraulic hybrid and conventional parcel delivery vehicles.
If you need captions, please click the cc button on the player to turn them on. When we think of alternative fuel, we think of fuel that doesnt come from oil. Alson, j barbara, d bryson, j dooflag, m haugen, d kargul, j mcdonald, j. Engine and truck corporation and john vanderslice and. Also, control system design for advanced excavation systems, such as automatic excavators and hybrid excavators, requires system models in order to design and simulate the control systems. John kargul, epa, clean automotive technology, cost effective solutions for a petroleum and. Review of the 21st century truck partnership, second report. Research and market transformation roadmap for medium and heavyduty trucks is the final report for the calheat project, phases 1 through 3 contract number 50009019, conducted by calstart. What are hydraulic hybrids first used in 1982 hydraulic hybrids are similar to electric hybrids but use fluid instead of electricity. If hybrid hydraulics prove their mettle for more industrial uses, cars may. Oct 25, 2012 though the traditional energy regeneration systemers which used a hydraulic motor and a generator in hybrid excavators can regenerate part of the energy, the power of the motor and the generator should be larger and the time for regenerating energy is so short.
Hydraulic hybrids, eaton corporation gordon excel, vice president and general manager, americas, cummins westport. Hydraulic hybrid vehicles, or hhvs use a pressurized fluid power source, along with a conventional internal combustion engine ice, to achieve better fuel economy and reductions in harmful emissions. Digital displacement hydraulic hybrids parallel hybrid drives for commercial vehicles jamie taylor1, win rampen, alasdair robertson, niall caldwell artemis intelligent power ltd, unit 3, edgefield industrial estate, loanhead, eh20 9tb, uk. Hydraulic accumulatormotorgenerator energy regeneration. Design and demonstration of epas integrated drive module. Hydraulic hybrid vehicle seminar report, ppt, pdf for. In this dissertation, energy efficient hydraulic systems are studied. Simulationbased optimization of a series hydraulic hybrid vehicle. Hhvs, like all hybrid vehicles, use two sources of power to drive the wheels. While thats not a big deal for parallel hydraulic hybrids, since their engines dont shut off when the vehicle stops, it is a big deal for series hydraulic hybrids. Upss fleet of iconic brown delivery vans is getting a little bit greener with the addition of some new hybrid trucks.
However, a number of car makers are looking to diesel fuel as a viable alternative to gasoline. Since the early 1990s kargul and his research team have been testing hybrid hydraulic systems as a core drivetrain technology for roughly 20 different sizes of vehiclesfrom 1,500kilogram. Also explore the seminar topics paper on hydraulic hybrid vehicle with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. Shows ability to get low hanging fruit 2030% mpg improvement epas f550 fleet retrofit demonstration vehicle with hydraulic launch assist. Hydraulic hybrid vehicle systems consists of four main components.
Erik everitt, kjell jonholm and tommy petersen have all helped me at some point. These hhvs include an engine off at idle function and meet 2010 emissions standards. Hydraulic hybrid systems consist of two key components. How hydraulic hybrids save tons of fuel where its needed. Lightning hybrids, which manufactures hydraulichybrid propulsion systems for trucks and buses, has doubled the space it of its uk facility as it aims to expand its international business. A hybrid vehicle is simply a vehicle that operates using a primary engine and secondary energy storage device. The hydraulic hybrid system basically consists of a fluid, a pump, a reservoir, and an accumulator.