In the modern sense an experiment proved the viability of small petrohydraulic hybrid road vehicles in 1978. The technology uses hydraulic hardware to augment the conventional powertrain engine and. You can combine the two power sources found in a hybrid car in different ways. The motivation for developing this drive train is a hydraulic hybrid vehicle test bed for. When the vehicle accelerates, fluid in the highpressure. This is done by capturing otherwise wasted energy and putting it to work in the vehicle. 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.
A new series hydraulic hybrid vehicle model with a regenerative hydraulic suspension system is also. The motivation for developing this drive train is a hydraulic hybrid vehicle test bed for the center for compact and. 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. Technologies, modeling and control a mechatronic approach is based on the authors current research in vehicle systems and will include chapters on vehicle propulsion systems, the fundamentals of vehicle dynamics, ev and hev technologies, chassis systems, steering control systems, and state, parameter and. This ford f550 parallel hydraulic hybrid vehicle was built to demonstrate the benefits of. Toyota prius series is an example of hybrid electric vehicle technology, astrolab is an example of hybrid solar vehicle and chevrolet volt is an example of plugin hybrid electric vehicle. Applicable for both the light and commercial vehicle markets, our creative solutions allow automakers flexibility in committing to propulsion technologies. Are hydraulic hybrid vehicles the future of driving. Hydraulic hybrid systems can capture up to 70% of the kinetic energy that would otherwise be lost during braking. It focuses on the power and propulsion systems for these vehicles, including issues related to power and energy management. Hhvs, like all hybrid vehicles, use two sources of power to drive the wheels. Hydraulic hybrid vehicle publications transportation. There are several major technologies that can, potentially, be used in a hybrid vehicle or more correctly put.
Introduction to how hydraulic hybrids work howstuffworks. The vessel typically carries a flexible bladder of precharged pressurized nitrogen gas. This is a multiterm project, and the ultimate goal is to convert it into the worlds first hydraulic. The simulation results of the energyconsumption estimation showed that the hybrid electric power steering system can reduce the steeringsystem energy consumption by more than 50% under the proposed driving cycle. Hybrid electric vehicles use batteries as the rechargeable energy storage system and hydraulic hybrid vehicles use highpressure.
Another hybrid option has been put forth and tested by a number of businesses, as well as the environmental protection agency epa. Energy efficiency comparison between hydraulic hybrid and. All electric cars use batteries charged by an external source, leading to the problem of range which is being solved in hybrid electric vehicle. A hybrid vehicle is a vehicle with more than one power source such as a small internal combustion engine and an electric motor. Mild, full or plugin hybrid technology is on the rise globally opening up a vast array of potential drive architectures. Hydraulic hybrid vehicle systems consists of four main components. A gaselectric hybrid recovers 30 percent of braking energy, while a hydraulic hybrid can recover 70 percent, contributing to better efficiency source. The following technical papers and fact sheets provide information about nrels hydraulic hybrid fleet vehicle evaluations.
The three most common categories of hydraulic hybrid vehicle. 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. Society of automotive engineers of japan, has been running annually since 1992 as a technology exposition for engineers and researchers working on the front line of the automotive industry. Development of a hydromechanical hydraulic hybrid drive train. Electricity means that a battery sometimes assisted by ultracaps is used to store the energy, and that an electromotor from now on called motor will be used as traction motor.
Design and evaluate a hydraulic hybrid minivan partnership details the partnership is a cooperative research and development agreement crada in which both organizations will closely collaborate on design and evaluation of the demonstration vehicle. Department of vehicle engineering, national taipei university of technology, 1, sec. Epa is leading the development of hydraulic hybrid vehicles. Regenerative braking is an energy recovery mechanism which. 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. The hybrid power systems used in automobiles have been adapted into the construction machinery. 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. Design and analysis of hydraulic hybrid passenger vehicles. Most passenger car hybrids have been electricinternal combustion engine models, but other hybrid technologies using hydraulic pumpmotors, flywheels, and. How series hydraulic hybrid vehicles work clean automotive. Hybrid hydraulic vehicles consist of two important part high pressure hydraulic fluid vessels called accumulators, and hydraulic drive pumpmotors. The basic models of hydraulic hybrid vehicles are shown and explained. The original epa hydraulic hybrid chassis successfully demonstrated that a typical diesel or petrol powered vehicle can be fitted with hydraulic components as a secondary energy storage system. Parallel drive system hydraulic hybrid technology in a passenger car.
The benefits include lower fuel costs, reduced exhaust emissions and a smaller carbon footprintall without any compromise in. Sep, 2004 the original epa hydraulic hybrid chassis successfully demonstrated that a typical diesel or petrol powered vehicle can be fitted with hydraulic components as a secondary energy storage system. Apr 27, 2014 parallel v series in a parallel hydraulic hybrid, the engine still has a mechanical connection through the pump to the drive wheels. 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. The toyota hybrid system relies on the voltage of the battery packbetween 276 and 288 v. Hydraulic hybrid vehicles are equipped with an accumulator for energy storage.
A variable displacement pump replaces the electric motorgenerator. 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. In some systems, a hydraulic transformer is also installed for converting output flow at any pressure with a very low power loss. The developed hydromechanical drive train enables independent control of the torque at each wheel. Hydraulic hybrid vehicles california clean air technology. The xebra is a 3wheeled electric vehicle that looks like a miniutility truck, but it is classified as a motorcycle, legal for driving in the united states. With an equally comprehensive product portfolio, we offer. The ase light duty hybridelectric vehicle specialist certification test reference starting on page 7 in this book is a resource that identifies concepts for the hybridelectric vehicle technology that will be included in. Evaluating the performance of hydraulic hybrid refuse vehicles. Sep 15, 2017 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.
Environmental technology environmental technology creates tools to minimize the effect of technology on the development of living things. This is done by using a displacement pump 1 to pump hydraulic fluid into an accumulator2. Pdf this paper explains the basic principles of hydraulic hybrid vehicles. Both the transmission and system capture more than 71% of a vehicles otherwise lost braking energy to increase brake durability up to eight times. In a regular vehicle, power is provided to the wheels by the engine through the transmission and drive shaft. In the next few lecture, lectures well be talking about hydraulic hybrid vehicles, and comparing them to electric hybrids in, in this video. Energy efficiency comparison between hydraulic hybrid. In hybrid electric vehicle the engine is the final source of the energy used to power the car. Pdf model of a hydraulic hybrid vehicle with regenerative. The cat 336e h hybrid excavator uses a new hydraulic hybrid technology developed by caterpillar to capture and reuse energy. In a hydraulic hybrid, pressurized fluid is used as secondary source of power. Hydraulic hybrid fleet vehicle testing transportation. The discussion on series hybrid vehicle technology will be continued in two subsequent posts titled.
Demonstrated the ease of retrofitting trucks with hydraulic hybrid technology. Recent trends hydraulic hybrid vehicles ankush menat 2. This energy drives a pump, which transfers hydraulic fluid from a lowpressure reservoir to a highpressure accumulator. 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. Epa will focus on incorporating its hhv technology into the prototype development vehicle. Development of a hydromechanical hydraulic hybrid drive. Therefore, natural concerns of environment and safety promote the uses of waterbased hydraulic hybrid system. Typical hydraulic hybrid system vehicles depend on oil based hydraulic fluid. Pdf n this paper three basic configurations of hydraulic hybrid vehicle are. Explore hydraulic hybrid vehicle with free download of seminar report and ppt in pdf and doc format. For technical details, please reference this white paper. Hydraulic hybrid our patented hydraulic launch assist or hla hydraulic hybrid system has two main parts. New hydraulic hybrid technology developed by epa and ford. Pdf hydraulic hybrid vehicle configurations and comparison with.
Hybrid electrical vehicles introduction a hybrid electric vehicle hev has two types of energy storage units, electricity and fuel. 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. A hydraulic hybrid vehicle uses hydraulic and mechanical components instead of electrical. Hybrid power trains are becoming an increasingly popular way of increasing vehicle efficiency and reducing emissions. Although petrohydraulic hybrid technology has been known for decades, and used in trains and very large construction vehicles, high costs of the equipment precluded the systems from lighter trucks and cars. Optimal design of powersplit transmissions for hydraulic. Although petro hydraulic hybrid technology has been known for decades, and used in trains and very large construction vehicles, high costs of the equipment precluded the systems from lighter trucks and cars. In turn, this advanced solution provides lower costs by reducing fuel consumption considerably. Similar to hybrid electric vehicles hevs, they reduce fuel consumption and emission by regenerating braking power, and by allowing the engine and transmission components to operate more ef. Hydraulic hybrid technology for vehicles 27 may 2014 the jsae automotive engineering exposition, jsae. In a series hhv, the engine is not directly connected to the wheels. Both hybrid electric and hydraulic hybrid heavyduty vehicles are available, with hybrid electric the most prevalent. Hydraulic hybrid vehicle configurations and comparison with hybrid electric vehicle conference paper pdf available june 2018 with 1,272 reads how we measure reads.
Series hybrid in a series hydraulic hybrid, the engine is directly connected to the hydraulic pump with no direct connection to the wheels. In the modern sense an experiment proved the viability of small petro hydraulic hybrid road vehicles in 1978. Facing the environment problems, the improvement on the efficiency of the construction machinery such as the excavator and wheel loader is highly demanded. A hybrid drivetrain with a hydraulic continuously variable transmission cvt is modeled to include efficiency information of the engine and. In laboratory tests, the city fuel economy of the hydraulic hybrid ups vehicle is 60% to 70% increased miles per gallon compared to a conventional ups truck. Series hybrid vehicle system design considerations parker.
The benefits include lower fuel costs, reduced exhaust emissions and a smaller carbon footprintall without any compromise in production, reliability, durability or operability in all applications. Hydraulic hybrid vehicle seminar report, ppt, pdf for. Electric hybrid vehicles have been the first hybrid technology to be mass produced for the commercial passenger car market. Hybrid electric vehicles are energy efficient and reduce the emissions. Hhvs are hybrid vehicle that use pressurized fluid instead of electric power as alternative power source along with internal combustion engine. 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. 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. This ford f550 parallel hydraulic hybrid vehicle was built to demonstrate the benefits of parallel hydraulic hybrids and to examine the costeffectiveness of parallel systems with the following results. Varying power component models, energy storage component models, and series or parallel configurations were combined into seven different vehicle configurations. The hydraulichybrid line provides very high power density. This breakthrough technology can costeffectively reduce emissions and drastically reduce fuel. During regeneration the vehicles kinetic energy that is normally lost during braking is captured and used to drive the pumpmotor as a pump. This paper presents a hydraulic hybrid vehicle drive train to improve the fuel efficiency of a passenger car. Hybrid synergy drive mechanism the original prius used shrinkwrapped 1.
Also, the vehicle testing of the chassis dynamometer revealed that the. The main focus of this paper is to simulate the potential of water hydraulic technology in hydraulic hybrid system vehicle. It focuses on the power and propulsion systems for these vehicles, including issues related to power and energy. 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 paper first analyzes the difference between the hybrid powered automobile vehicle and the hybrid powered construction machinery. Parallel v series in a parallel hydraulic hybrid, the engine still has a mechanical connection through the pump to the drive wheels. The hydraulic hybrid line provides very high power density. A new series hydraulic hybrid vehicle model with a regenerative. Cat how the hybrid excavator system works caterpillar.
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