Design and analysis of hydraulic hybrid passenger vehicles. Pdf hydraulic hybrid transmissions for onroad vehicles. 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. Get more information about hybrid electric vehicle ppt slides free download by visiting this link. Another hybrid option has been put forth and tested by a number of businesses, as well as the environmental protection agency epa. Engineers aim to take hydraulic hybrid powertrains beyond niche status in medium and heavyduty trucks and buses. The other problem is that to get the 458 kj, you have to supply 500 kj of heat. 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. Commonly used by trucks, buses with frequent stops.
Hydraulic hybrids draw from two sources of power to operate the vehicle. In the next few lecture, lectures well be talking about hydraulic hybrid vehicles, and comparing them to electric hybrids in, in this video. 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. The hydraulic hybrid line provides very high power density. This feature is essential for heavy vehicle hybridization. An electric hydraulic motor system for vehicles features an electric motor and an electric generator operatively connected to a battery of a vehicle and hydrogen fuel cell. This video clip is an excerpt from discovering fluid power a 30minute program developed by the engineering research center for compact and efficient fluid power ccefp in cooperation with the. Are hydraulic hybrid vehicles the future of driving. Hydraulic hybrids are able to capture and reuse 7080% of the otherwise wasted braking energy. Ppt hydraulic hybrid powerpoint presentation free to.
If you need captions, please click the cc button on the player to turn them on. In a hydraulic hybrid, pressurized fluid is used as secondary source of power. Seminar on hybrid cars hybrid electric vehicles hev full. 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.
Technical challenges with hydraulic hybrid vehicles include noise, size, and complexity. Hydraulic hybrid vehicles hhvs are mainly operated using engines, or using alternate combinations of engine and hydraulic power sources while vehicles accelerate. Seminar on hybrid cars hybrid electric vehicles hev. Hydraulic hybrid technologies improve the fuel economy of cityuse medium duty vehicles by recovering braking energy and reusing it for driving, most notably vehicle launching. Electrichydraulic hybrid drivetrain for city vehicles. 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. Optimal design of powersplit transmissions for hydraulic. The hydraulic components are attached to the driveshaft and assist in stopping and accelerating the vehicle. Us9593677b1 electric hydraulic motor system for vehicles. A new series hydraulic hybrid vehicle model with a regenerative. One of the main problems that should be solved for the successful commercialization of hhv is the excessive noise and vibration involving with the. In this paper, a parametric design of hydraulic driving system for a medium duty truck is conducted based on its power demand in typical urban driving cycles. Download the seminar report for hybrid electric vehicle.
The hydraulichybrid line provides very high power density. Hydraulic hybrid vehicles environmentally conscious. This paper introduces the electro hydraulic hybrid actuator system specially developed for compact assembly. Abstracthydraulic hybrid vehicles are inherently power dense. Hhvs, like all hybrid vehicles, use two sources of power to drive the wheels. 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.
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. A hybrid vehicle uses two or more distinct types of power, such as submarines that use diesels when surfaced and batteries when submerged. Hybrid vehicles reduce their fuel consumption by capturing energy normally lost during braking and reusing it during acceleration in addition to managing the engine to enable it. 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. The system features a fuel engine hydraulic pump operatively connected to a standard fuel engine of the vehicle. A feasibility study of an electrichydraulic hybrid. Hydraulic hybrid vehicles amin mohaghegh motlagh department of mechanical, industrial and manufacturing engineering, the university of toledo, toledo, ohio, usa.
A hydraulic accumulatorbattery hybrid energy system, called hydraulicelectric synergy system hess, is designed to overcome the drawbacks of existing single energy storage sources used in heavy hybrid vehicles, which adopts hybrid energy structure to combine high power hydraulic accumulator and high specific energy battery together 28. Hybrid electric vehicles hevs are comparatively environmentally friendly and energy efficient, but cost substantially more compared with conventional vehicles. Hydraulic hybrid our patented hydraulic launch assist or hla hydraulic hybrid system has two main parts. In hybrid electric vehicle the engine is the final source of the energy used to power the car. Electronics help cut costs of hydraulic hybrid trucks. Introduction to how hydraulic hybrids work howstuffworks. Abstract hydraulic hybrid vehicles are inherently power dense. Explore hydraulic hybrid vehicle with free download of seminar report and ppt in pdf and doc format. Jul 12, 2006 the mechanical batteries used in hydraulic hybrid vehicles hhv can be charged and discharged remarkably faster than chemical batteries. The basic models of hydraulic hybrid vehicles are shown and explained. A hydrostatic dynamometer has been constructed to test a hydraulic hybrid passenger vehicle. Proposed actuator design allows the replacement of long flexible pipe lines and associated hydraulic losses by electrical cables and enables.
All electric cars use batteries charged by an external source, leading to the problem of range which is being solved in hybrid electric vehicle. You can combine the two power sources found in a hybrid car in different ways. The hydraulic hybrid vehicle also achieves approximately 50% lower hydrocarbon and 60% lower particulate matter in laboratory tests. Hydraulic hybrid transmissions for onroad vehicles. For trucks and buses, this can also be less expensive than electric systems. The technology, which uses hydraulics instead of electrical components to aid an internal combustion engine, is said to offer big efficiency benefits. Jim obrien, of hybriddrive systems, in deerfield michigan, converted a 1968 volkswagen beetle into a hydraulic hybrid. This video explains the benefits of hydraulic hybrid vehicle or hhv technology. Powersplit or hydromechanical transmissions hmt have advantages over series and parallel architectures. Hydraulic hybrids are able to capture and reuse 7080% of. Pdf utilisation of electrohydraulic hybrid actuator. It focuses on the power and propulsion systems for these vehicles, including issues related to power and energy. Hydraulic hybrid technology uses a hydraulic energy storage and propulsion system in the vehicle. The mechanical batteries used in hydraulic hybrid vehicles hhv can be charged and discharged remarkably faster than chemical batteries.
This prototype vehicle has also demonstrated modest reductions in nox emissions. Hybrid hydraulic drives kd solutions kinetics drive. A feasibility study of an electrichydraulic hybrid powertrain for passenger vehicles emilio honey and insoo suh proceedings of the institution of mechanical engineers, part d. Though initially it had its backlogs in the market.
Both the transmission and system capture more than 71% of a vehicles otherwise lost braking energy to increase brake durability up to eight times. A gaselectric hybrid recovers 30 percent of braking energy, while a hydraulic hybrid can recover 70 percent, contributing to better efficiency source. 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. Obrien said, we are not aware of anything else like it. In a regular vehicle, power is provided to the wheels by the engine through the transmission and drive shaft. Oct 24, 2005 the epa is a research leader in the application of hydraulics in vehicles.
Optimal design of a powersplit transmissions for hydraulic. There are four main modes of operation in a parallel hhv. Epa delivers with fully hydraulic hybrid truck hydraulics. Hydraulic hybrid vehicle seminar report, ppt, pdf for. 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. A dieselturbine engine drives an electric generator or hydraulic pump, which powers electric hydraulic motors strictly an electric hydraulic transmission not a hybrid, unless it can accept power from outside. Vibration isolation for parallel hydraulic hybrid vehicles. The process involves in the development of the small hybrid system is similar to other larger hybrid vehicle system.
Hybrid powertrains have the potential to benefit the fuel efficiency of highway and offhighway vehicles. Parker has a new mediumduty hydraulic transmission using the same proven, costsaving technology as the runwise advanced series hydraulic hybrid drive system, but in a smaller, lighter package. Design and construction of a hydrostatic dynamometer for. Hybrid power trains are becoming an increasingly popular way of increasing vehicle efficiency and reducing emissions.
Keep in mind this would be strictly a mild hybrid setup, useful mainly for load leveling a combustion engine powertrain. They capture and reuse 70% 80% of the vehicle s brakingdecelerating energy compared to 55% for electric hybrids. 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. What are hydraulic hybrids first used in 1982 hydraulic hybrids are similar to electric hybrids but use fluid instead of electricity.
Other means to store energy include pressurized fluid in hydraulic hybrids the basic principle with hybrid vehicles is that the different motors work better at different speeds. One research companys goal was to create a fresh design to improve the packaging of gasolinehydraulic hybrid components. Peapod, an online grocer, took delivery of its first two fuel efficient, hydraulic hybrid delivery trucks this month. But even in a mild hybrid setup, there are knock on benefits to hydraulics.
Electric hydraulic hybrid drivetrain for city vehicles. Nowadays hybrid vehicles have come to every average drivers knowledge. Within five years, company executives want to outfit 10,000 vehicles per year. Hybrid vehicles reduce their fuel consumption by capturing energy normally lost during braking and reusing it during acceleration in addition to managing the engine to enable it to run at a higher efficiency operating point. Innovative truck credits are also allowed for clean fuel refrigerated trailers and hydraulic hybrid conversions. 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. How series hydraulic hybrid vehicles work clean automotive. Optimized production vehicles are expected to have larger nox reductions. What are the pros and cons of hydraulic hybrid vehicles. Hydraulic powersplit architecture is chosen in this study for its flexibility in operation and combined advantage of series and parallel architecture. 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. The latest developments in the field of hybrid electric vehicles hybrid electric vehicles provides an introduction to hybrid vehicles, which include purely electric, hybrid electric, hybrid hydraulic, fuel cell vehicles, plugin hybrid electric, and offroad hybrid vehicular systems.
The technology, which uses hydraulics instead of electrical components to aid an internal combustion engine, is. Energy efficiency comparison between hydraulic hybrid and. Recent trends hydraulic hybrid vehicles ankush menat 2. Jan 26, 2015 parker has a new mediumduty hydraulic transmission using the same proven, costsaving technology as the runwise advanced series hydraulic hybrid drive system, but in a smaller, lighter package. Introduction hydraulic hybrid system components of a hydraulic hybrid hydraulic hybrid vehicle research areas summary references skip to article content.
In a series hhv, the engine is not directly connected to the wheels. In epa tests a hydraulic hybrid ford expedition returned 32 mpg. The epa is a research leader in the application of hydraulics in vehicles. Hydraulic hybrid vehicles california clean air technology. Hybrid power trains use dieselelectric or turboelectric to power railway locomotives, buses, heavy goods vehicles, mobile hydraulic machinery, and ships. Hydraulic hybrid vehicles a hybrid vehicle is a vehicle that uses more than one source of power for functioning or movement. A hybrid drivetrain with a hydraulic continuously variable transmission cvt is modeled to include efficiency information of the engine and hydraulic components.
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. In this paper, an approach for optimizing the conguration and sizing of a hydraulic hybrid powersplit transmission is proposed. Jul 20, 2017 12 hydraulic hybrids that go heavy duty the littleknown hydraulic hybrid powertrain is alive and well, and slowly making inroads in heavyduty vehicles. Other means to store energy include pressurized fluid, in. Seminar on hybrid cars hybrid electric vehicles hev full report pdf download abstract have you pulled your car up to the gas pump lately and been shocked by the high price of gasoline. Its unlikely that it will be possible to store enough pressurized hydraulic fluid to give a vehicle significant range as a standalone system. Thermodynamic analysis of compressed air vehicle propulsion the figures are most relevant to simple aironly designs nonhybrid with ambient reheating. Similar to electric hybrids, hydraulic hybrids are either series or parallel. 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. During regeneration the vehicles kinetic energy that is normally lost during braking is captured and used to drive the pumpmotor as a pump. Parametric design and regenerative braking control of a. In a parallel hydraulic hybrid vehicle hhv, the engine still provides power to the wheels through a standard transmission. All bulky hydraulic components were integrated into the chassis.
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