Pdf model of a hydraulic hybrid vehicle with regenerative. Design and analysis of hydraulic hybrid passenger vehicles. Explore hydraulic hybrid vehicle with free download of seminar report and ppt in pdf and doc format. This video explains the benefits of hydraulic hybrid vehicle or hhv technology.
Development of a hydromechanical hydraulic hybrid drive train. Hybrid powertrains have the potential to benefit the fuel efficiency of highway and offhighway vehicles. Hydraulic hybrid and conventional parcel delivery vehicles measured laboratory fuel economy on targeted drive cyclespdf. Electro hydraulic power steering ep as systems electric. A hybrid vehicle has multiple forms of motive power. All bulky hydraulic components were integrated into the chassis. The other problem is that to get the 458 kj, you have to supply 500 kj of heat. How series hydraulic hybrid vehicles work clean automotive. Recent trends hydraulic hybrid vehicles ankush menat 2. The objective is to evaluate the fuel consumption potential of hydraulic hybrid vehicles evaluate the tradeoffs between energy storage system power and energy for different vehicle applications and drive cycles hydraulic storage. Vehicles adopting this new technology have experienced up to a 50% reduction in fuel consumption on a typical route with ancillary benefits. Thermodynamic analysis of compressed air vehicle propulsion the figures are most relevant to simple aironly designs nonhybrid with ambient reheating.
Many simulink models were created in matlab to determine experimental predictions. Credits for electric and plugin hybrid electric vehicles colorado allows innovative motor vehicle and innovative truck credits for the purchase, lease, or conversion of motor vehicles, trucks, and trailers that use certain alternative fuels. Traditional electric hybrid vehicles combine internal combustion engine power plants with electric motorsgenerators to propel the vehicle or capture its braking energy. 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. What are the pros and cons of hydraulic hybrid vehicles. Initial laboratory tests results for this hhv layout in a pilot vehicle showed greater than 70% improvement in fuel efficiency mpg with a corresponding 40 percent reduction in co 2 emissions. Electrichydraulic hybrid drivetrain for city vehicles. Aug 11, 2010 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. Studies have shown that hydraulichybrid vehicles can use up to 30% less fuel. But even in a mild hybrid setup, there are knock on benefits to hydraulics.
The hydraulic transmission system for hevs is designed to provide electric using two main sources of power as range extender internal. Optimized production vehicles are expected to have larger nox reductions. If you need captions, please click the cc button on the player to turn them on. In a parallel hydraulic hybrid there is a conventional engine and drive train system with hydraulic hybrid technology attached to the drive shaft to learn more visit how parallel hhvs works. 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. The hydraulichybrid line provides very high power density. During braking, the accumulator is initially filled, exerting a force against the gas pressure. 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.
Peapod, an online grocer, took delivery of its first two fuel efficient, hydraulic hybrid delivery trucks this month. Hydraulic accumulators are used to store braking energy in hybrid vehicles, among other tasks. Technical advances, such as very large diameter, flat format ldff hydraulic motors which produce very high torque in limited drive line space, enable heavy vehicles like refuse trucks and city buses to be fitted with hydraulic hybrid systems. A new series hydraulic hybrid vehicle model with a regenerative. The hydraulic hybrid line provides very high power density. Design optimization of a hydraulic flywheel accumulator for a. Innovative lightweight piston accumulator for hydraulic. Hevs are powered by an ice and by an electric motor that uses energy stored in a battery. Hydraulic hybrid vehicles california clean air technology. Greenhouse gases and lightduty vehiclesduty vehicles. Electronics help cut costs of hydraulic hybrid trucks.
Hydraulic accumulators store energy for high chargedischarge rates in cases where vehicles have high loads and frequent stopstart duty cycles. Hydraulic hybrid vehicle publications transportation research. Hybrid electric vehicles are energy efficient and reduce the emissions. This paper presents a hydraulic hybrid vehicle drive train to improve the fuel.
Optimal design of powersplit transmissions for hydraulic. Jim obrien, of hybriddrive systems, in deerfield michigan, converted a 1968 volkswagen beetle into a hydraulic hybrid. Hydraulic hybrid and conventional parcel delivery vehicles measured laboratory fuel economy on targeted drive cycles. A motor vehicle, truck, or trailer must be titled and registered in colorado to qualify for the credit. Another promising dimension is the development of mildhybrid systems, which will likely provide onehalf to twothirds the fuelefficiency benefits of fullfunction hybrids at less than half the cost. A hybrid drivetrain with a hydraulic continuously variable transmission cvt is modeled to include efficiency information of the engine and hydraulic components. Like all hydraulic hybrid systems, the companys technology uses a socalled gas spring to send power to the trucks driveshaft, thereby boosting acceleration efficiency and braking capability. In this paper, an approach for optimizing the conguration and sizing of a hydraulic hybrid powersplit transmission is proposed. 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. Are hydraulic hybrid vehicles the future of driving. Hybrid vehicles provide a solution to this demand, and hydraulic hybrid vehicles are shown to have a cheaper cost of ownership compared to electric hybrid vehicles. Technology development and cost reduction better, lowercost hybrid subsystems.
Hydraulic hybrid vehicles a hybrid vehicle is a vehicle that uses more than one source of power for functioning or movement. The basic models of hydraulic hybrid vehicles are shown and explained. Use of plugin hybrid electric vehicles phevs allows the limited use of liquid fuels to extend range when that is needed for convenience, taking advantage of their very high energy density, while addressing the need for fuel conservation during the typical shorter commuting trips that dominate usage. How series hydraulic hybrid vehicles work in a regular vehicle, power is provided to the wheels by the engine through the transmission and drive shaft. Hydraulic hybrid fleet vehicle testing transportation. Hydraulic hybrid vehicle seminar report, ppt, pdf for. Hydraulic powersplit architecture is chosen in this study for its flexibility in operation and combined advantage of series and parallel architecture. Hhvs, like all hybrid vehicles, use two sources of power to drive the wheels. Most electric vehicles waste over 50% of the battery energy when challenged with the accelerations of modern traffic. Technical challenges with hydraulic hybrid vehicles include noise, size, and complexity.
Abstractthis paper presents a hydraulic hybrid vehicle drive train to. Hydraulic hybrid systems can capture up to 70% of the kinetic energy that would otherwise be lost during braking. I love the mechanical elegance and oldschool charm of hydraulics, but i am betting the future is electric with hybrids as the motive power energy source of the future. Venigalla the social cost of motor vehicle use in the united states mark a. Parallel v series in a parallel hydraulic hybrid, the engine still has a mechanical connection through the pump to the drive wheels. Potentially, these technologies could also be combined with alternative fuels. A hydraulic hybrid system captures about 70% of the kinetic energy that would. A lot of things have been tried to make hybrid motor vehicles, from super capacitors to large flywheels. Proving that brown can go green, ups placed an order for seven hydraulic hybrid delivery vehicles to be introduced between 2009 and 2010. Series hybrid in a series hydraulic hybrid, the engine is directly connected to the hydraulic pump with no direct connection to the wheels. Pdf n this paper three basic configurations of hydraulic hybrid vehicle are. Hydraulic hybrid vehicles are the future vehicle as it is more better and efficient than the traditional cars as hydraulics systems can recover about 75% of the kinetic energy during braking and deceleration, as compared to the 25% recovery from electric hybrids and its proven to be more costeffective than electric hybrid systems.
Introduction to how hydraulic hybrids work howstuffworks. Pdf hydraulic hybrid vehicle configurations and comparison with. One research companys goal was to create a fresh design to improve the packaging of gasolinehydraulic hybrid components. Hhv and hybrid electric vehicle hev models, hydraulic. Series hydraulic hybrid system with optimized supervisory control. Most passenger car hybrids have been electricinternal combustion engine models, but other hybrid technologies using hydraulic pumpmotors, flywheels, and. Hydraulic hybrid and conventional parcel delivery vehicles. The vehicles, existing workhorse walkin vans with gm gasoline engines and equipped with the lightning hybrids energy recovery system ers, are in service on the streets of chicago and were partially paid for by the drive clean. Hybrid vehicle drive trains transmit power to the driving wheels for hybrid vehicles.
In epa tests a hydraulic hybrid ford expedition returned 32 mpg. Abstracthydraulic hybrid vehicles are inherently power dense. 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. Combustion engine ice and from battery storage devices. The epa estimates that co2 emissions from hydraulic hybrid ups trucks are 40 percent lower than conventional ups trucks, and a fleet of trucks could save 1,000 gallons of fuel a year. Powersplit or hydromechanical transmissions hmt have advantages over series and parallel architectures. Electric hydraulic hybrid drivetrain for city vehicles. Currently all development that has gone into hydraulic hybrid vehicles has been designed for new vehicles which the system would be integrated into. Another promising dimension is the development of mild hybrid systems, which will likely provide onehalf to twothirds the fuelefficiency benefits of fullfunction hybrids at less than half the cost. In some of these cars, fluid hydraulic technology is used as an additional source of power along with diesel or gas these are referred to as hydraulic hybrid vehicles. Hydraulic fluid is fundamentally no different from transmission fluid currently being used in most vehicles.
Energy efficiency comparison between hydraulic hybrid. This stored energy is then available when needed to accelerate the vehicle. For example, a hybrid may receive its energy by burning petroleum, but switch between an electric motor and a combustion engine. Keep in mind this would be strictly a mild hybrid setup, useful mainly for load leveling a combustion engine powertrain. Depending on the nature of the nonelectric energy source, we can distinguish between combustion ice, fuel cell, hydraulic or pneumatic power, and human power.
Our challenge is to design a system that will be retrofitable, and cheap enough that consumers and companies will. Electro hydraulic power steering systems the first version of electric power assisted steering epas was the changing of the power source for the traditional hydraulic power steering from a mechanical pump, driven off the engine via a belt drive arrangement to an electrically driven pump. Another hybrid option has been put forth and tested by a number of businesses, as well as the environmental protection agency epa. Abstract hydraulic hybrid vehicles are inherently power dense. Using advanced technology vehicles, such as hydraulic and electric hybrid trucks, can help a fleet reduce its petroleum consumption and emissions. Honda insight in north america has a 5 speed manual transmission. Because of the high system cost, hydraulic hybrids have typically been the domain of. A gaselectric hybrid recovers 30 percent of braking energy, while a hydraulic hybrid can recover 70 percent, contributing to better efficiency source. Photo by andrew hudgins, nrel 17416 electricdrive vehicles at a glance hevs. Lammert, jonathan burton, petr sindler, and adam duran. Hydraulic hybrids are able to capture and reuse 7080% of the otherwise wasted braking energy.
Michael griffin public transportation and the environment michael d. Design optimization of a hydraulic flywheel accumulator. This energy drives a pump, which transfers hydraulic fluid from a lowpressure reservoir to a highpressure accumulator. Its unlikely that it will be possible to store enough pressurized hydraulic fluid to give a vehicle significant range as a standalone system. In a hydraulic hybrid, pressurized fluid is used as secondary source of power.
343 869 743 373 746 124 1195 373 185 282 1296 1219 1041 1419 945 1622 600 170 496 330 972 344 1381 1003 349 82 485 71 1010 940 1446 1265 1079