Between the two manifolds, there are more than 17 various sizes of flow, directional and solenoid operated sun control valves used in the finished design. The engine power and the hydraulic motor power synthesized in the power coupler, and then output to transmis. The internal combustion engine is only connected to a pump, and is set to operate in its most efficient power range to maintain the optimal hydraulic pressure in the accumulator. Modeling and simulation of power coupling system in. Series hydraulic hybrid parallel hydraulic hybrid powersplit hydraulic hybrid ice internal combustion engine acc hydraulic accumulator hyd hydrostatic transmission veh vehicle. Epa and chrysler to jointly design and evaluate a hydraulic hybrid minivan pdf 2 pp, 814k, epa420f11002, january 2011 fact sheet. Hybrid drives for vehicles or machines have at least two energy sources. Development of a hydromechanical hydraulic hybrid drive train. 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. But in traffic, particularly stop and go traffic, a series hydraulic hybrid can shut its. The prototype was installed in a 2003 ford expedition suv with the following results.
Many simulink models were created in matlab to predict. Gainscheduled approach for the engine antistall control of displacementcontrolled multiactuator systems. Its unlikely that it will be possible to store enough pressurized hydraulic fluid to give a vehicle significant range as a standalone system. 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 main energy source is usually a combustion engine diesel, petrol, gas or an electric motor connected to the mains supply. Explore hybrid car with free download of seminar report and ppt in pdf and doc format. In a parallel hydraulic hybrid vehicle hhv, the engine still provides power to the wheels through a standard transmission. But even in a mild hybrid setup, there are knock on benefits to hydraulics.
In epa tests a hydraulic hybrid ford expedition returned 32 mpg. 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. In a series hydraulic hybrid vehicle, the pumpmotor directly connects to the driveshaft, or the inwheel motors provide driving torque directly to the wheel. Hybrid synergy drive type seriesparallel, full hybrid system output bhpkw 4100 engine engine type 2zrfxe atkinson cycle no. May 29, 2008 however, hydraulic hybrid systems are perfect for vehicles running at relatively low speeds. Remember, the hydraulic hybrid system gets its power through regenerative braking. Engineering hydraulic, hybrid and electromechanical system solutions parker has successfully integrated products that address the needs of industry for over fifty years. 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. This purely hydraulic transmission allows optimal engine management yet creates a less efficient power transmission path than a mechanical transmission.
For example, a hybrid may receive its energy by burning petroleum, but switch between an electric motor and a combustion engine. A new series hydraulic hybrid vehicle model with a regenerative. Keep in mind this would be strictly a mild hybrid setup, useful mainly for load leveling a combustion engine powertrain. Hhvs, like all hybrid vehicles, use two sources of power to drive the wheels. The secondary energy source in hybrid systems can be either electrical batteries, doublelayer capacitors, flywheel systems or hydraulic. The hydraulic motor is the rotary counterpart of the hydraulic cylinder as a linear actuator. 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. Optimal design of powersplit transmissions for hydraulic. Because of the high system cost, hydraulic hybrids have typically been the domain of. Most broadly, the category of devices called hydraulic motors has sometimes included those that run on hydropower namely, water engines and water motors but in todays. There are four main modes of operation in a parallel hhv.
Were applying electronics, hydraulics, filtration and fluid conveyance products to optimise subsystems. Adaptive robust motion control of an excavator hydraulic hybrid swing drive. Hydraulic hybrid vehicles hhvs are mainly operated using engines. In a series hybrid system, the engine is directly coupled to a hydraulic pump and the wheels are coupled to one or more hydraulic pumpmotors. Most passenger car hybrids have been electricinternal combustion engine models, but other hybrid technologies using hydraulic pumpmotors, flywheels, and. All bulky hydraulic components were integrated into the chassis.
Powersplit or hydromechanical transmissions hmt have advantages over series and parallel architectures. Epa, in cooperation with its partners, has successfully installed and tested hydraulic hybrid technology in a variety of vehicles. Design optimization of a hydraulic flywheel accumulator. However, many hydraulic pumps cannot be used as hydraulic motors because they cannot be backdriven. Also explore the seminar topics paper on hybrid car 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. Hybrid electrichydraulic systems components torque converters clutches gears chains cvt components pumps and hydraulics tests engine firing pulse simulation engine inertia simulation dynamic road load drive cycle efficiency spin loss durability functionality development drivetrain. Pdf n this paper three basic configurations of hydraulic hybrid vehicle are explained. Pdf hydraulic hybrid vehicle configurations and comparison with. Pdf hydraulic hybrids the new generation of energy.
Delivery powertrain using series hydraulic hybrid technology. Apr 17, 2020 explore hybrid car with free download of seminar report and ppt in pdf and doc format. 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. Drivetrain design and development southwest research institute. Internal combustion engines create power most efficiently at relatively high power levels near the rpm of the peak torque output.
This video explains the benefits of hydraulic hybrid vehicle or hhv technology. Pdf model of a hydraulic hybrid vehicle with regenerative. Design optimization of a hydraulic flywheel accumulator for a. A hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into torque and angular displacement. A hybrid drivetrain with a hydraulic continuously variable transmission cvt is modeled to include efficiency information of the engine and hydraulic components. Full hydraulic hybrid suv full integrated hydraulic hybrid, diesel engine, clean packaging, cost effective, targets 85% mpg improvement excellent year payback for consumer best configuration to communicate a vision of production potential showcasing the full use of hydraulics in a ford expedition. In the first case, the ice is a spark ignition engines gasoline or compression ignition direct injection diesel engine. The basic models of hydraulic hybrid vehicles are shown and explained. Innovation that works affordable advanced technologies. Pdf this paper explains the basic principles of hydraulic hybrid vehicles. Design and analysis of hydraulic hybrid passenger vehicles. In a combined hybrid, a smaller, less flexible, and highly efficient engine can be used.
In the first two cases, the energy conversion unit may be powered by gasoline, methanol, compressed natural gas, hydrogen, or other alternative fuels. The power transmission line of hybrid driven mode is shown in figure 4. These demonstration vehicles, featured below, have shown tangible realworld results, including fuel economy improvements of 30 percent to over 100 percent over their conventional counterparts. The hydraulic components are attached to the driveshaft and assist in stopping and accelerating the vehicle.
On the other hand, an electric motor exhibits maximum torque at stall and is well suited to complement the engine s torque deficiency at low rpms. This is done by using a displacement pump 1 to pump hydraulic fluid into an accumulator2. Delivery powertrain using series hydraulic hybrid technology engineering essay. A less than twoyear payback when produced in high volume. If the hydraulic hybrid city bus running in hybrid driven mode, clutch c2 should be engaged while clutch c1 should be disengaged. Research in hybrids and power a destined hybrid of intention and collaboration the hybrid electric concept technology is designed for a wheel loader, but. Roadmap and technical white papers for 21st century truck. Introduction to how hydraulic hybrids work howstuffworks. Conceptually, a hydraulic motor should be interchangeable with a hydraulic pump because it performs the opposite function similar to the way a dc electric motor is theoretically interchangeable with a dc electrical generator. This hydraulic hybrid demonstrated fuel savings resulting from combining a full series hydraulic hybrid system with a diesel engine. Another hybrid option has been put forth and tested by a number of businesses, as well as the environmental protection agency epa. Whether your products move, turn, shape, mold, lift, dig, or haul, you can depend on eatons hydraulics products to deliver the performance you need to stay competitive.
The combination of the hydraulic hybrid technology and the cdc engine or higheficiency alcohol engine will result in the worlds cleanest, most fueleficient, and most costeffective urban delivery vehicle. But in traffic, particularly stop and go traffic, a series hydraulic hybrid can shut its engine off and use hydraulic power alone. Hybrid hydraulic drivetrain architectures schematic, compare similarly stecki and matheson, 2005. According to parker hannifin, the system supplies 100% of the power hydraulically from a stop and ramps down to less than 10% of power transmitted hydraulically at 30 mph with a 50% mechanical hydraulic pathway split at 15 mph. A prime advantage of certain hydraulic hybrid drive train architectures is leveraging the intrinsically high power density of the hydraulic energy storage system through optimal engine management. A full hybrid hydraulic powertrain complete with an engine as well as an electric generator for recovering brake energies has not been investigated in the literature. Depending on the nature of the nonelectric energy source, we can distinguish between combustion ice, fuel cell, hydraulic or pneumatic power, and human power. Hydraulic hybrids the new generation of energy efficient drives. The system also shuts off the diesel engine when it is not needed. Hydraulic hybrid vehicle fuel consumption potential. A hybrid vehicle has multiple forms of motive power. The hydraulic component of the engine consists of a low pressure reservoir, a hydraulic pump and a high.
Series hydraulic hybrid system with optimized supervisory control. In a hydraulic hybrid, pressurized fluid is used as secondary source of power. One obvious advantage with hydraulic hybrid systems is that they create a unique opportunity to optimize the engine loading at all speeds. This paper presents a hydraulic hybrid vehicle drive train to improve the fuel. Each hydraulic hybrid drive system uses two ductile iron integrated packages, supplied from the new sarasota integrated package plant at 803 tallevast road.
Hydraulic systems electromechanical systems hybrid systems. Abstracthydraulic hybrid vehicles are inherently power dense. Demonstration vehicles clean automotive technology. Energy efficiency comparison between hydraulic hybrid. They capture and reuse 7080% of the vehicles brakingdecelerating energy compared to 55% for electric hybrids. About the power density, hydraulic machines have around 5. Eatons unwavering dedication to leadership in mobile and industrial applications has made eaton one of the worlds preferred suppliers of hydraulic systems, parts.
Hydraulic hybrid and conventional parcel delivery vehicles. With the increase of gasoline cost, due to decrease of natural resources, and the necessity of environmental friendly solutions we have assisted in the last decades, to the raise of new technologies that use another kind of source to make cars move. Electro hydraulic power steering ep as systems electric. During 80 % of the propulsion time, the required wheel power is less than 11 kw indicated by the grey band in the diagram layout of the hydrid. That means that, flying down the highway, a hydraulic hybrid isnt much different than a regular car.
Hybrid vehicle drive trains transmit power to the driving wheels for hybrid vehicles. One research companys goal was to create a fresh design to improve the packaging of gasolinehydraulic hybrid components. Explore hydraulic hybrid vehicle with free download of seminar report and ppt in pdf and doc format. Development of a hydromechanical hydraulic hybrid drive. Hydraulic hybrid vehicle seminar report, ppt, pdf for. During regeneration the vehicles kinetic energy that is normally lost during braking is captured and used to drive the pumpmotor as a pump. How parallel hydraulic hybrid vehicles work in a parallel hydraulic hybrid vehicle hhv, the engine still provides power to the wheels through a standard transmission. Are hydraulic hybrid vehicles the future of driving. Technology development and cost reduction better, lowercost hybrid subsystems. How series hydraulic hybrid vehicles work clean automotive. Along with epa which worked for over 10 years with a wide variety of private and public sector organizations and ups, several other organizations contributed to the development of the hydraulic hybrid vehicle, including eaton corporation, international truck and engine corporation, the u. Hybrid car seminar report, ppt, pdf for mechanical. This presentation does not contain any proprietary, confidential, or otherwise restricted information. Hydraulic hybrid vehicles california clean air technology.
In a hydraulic hybrid, power comes from pressurized fluid in addition to the internal combustion engine propulsion that helps in better fuel economy than the conventional system. In a series hybrid system overspeed of the engine also means overspeed of the hydraulic pump. This is because a combustion engine s torque is minimal at lower rpms, as the engine is its own air pump. The hydraulic flywheel accumulator is a novel energy storage device that has the potential to overcome major drawbacks of conventional energy storage methods for mobile hydraulic systems. The ups pilot vehicle demonstrates the cost effectiveness of hydraulic hybrid technology which can be applied to all trucks that operate in urban environments as well as highway vehicles. For trucks and buses, this can also be less expensive than electric systems, due. Proceedings of the sae 2015 commercial vehicle engineering congress.