Hydraulic hybrid vehicle systems consists of four main components. Parallel drive system hydraulic hybrid technology in a passenger car. In the next few lecture, lectures well be talking about hydraulic hybrid vehicles, and comparing them to electric hybrids in, in this video. The developed hydromechanical drive train enables independent control of the torque at each wheel. In a series hhv, the engine is not directly connected to the wheels.
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. 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. In turn, this advanced solution provides lower costs by reducing fuel consumption considerably. 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. It focuses on the power and propulsion systems for these vehicles, including issues related to power and energy. 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. The motivation for developing this drive train is a hydraulic hybrid vehicle test bed for the center for compact and. 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. 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. This paper first analyzes the difference between the hybrid powered automobile vehicle and the hybrid powered construction machinery. With an equally comprehensive product portfolio, we offer. The motivation for developing this drive train is a hydraulic hybrid vehicle test bed for. 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. Recent trends hydraulic hybrid vehicles ankush menat 2.
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. 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. This is done by using a displacement pump 1 to pump hydraulic fluid into an accumulator2. This paper presents a hydraulic hybrid vehicle drive train to improve the fuel efficiency of a passenger car. Hydraulic hybrid our patented hydraulic launch assist or hla hydraulic hybrid system has two main parts. Also, the vehicle testing of the chassis dynamometer revealed that the. 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. Parallel v series in a parallel hydraulic hybrid, the engine still has a mechanical connection through the pump to the drive wheels. The cat 336e h hybrid excavator uses a new hydraulic hybrid technology developed by caterpillar to capture and reuse energy.
Epa will focus on incorporating its hhv technology into the prototype development vehicle. Hybrid electric vehicles are energy efficient and reduce the emissions. In the modern sense an experiment proved the viability of small petro hydraulic hybrid road vehicles in 1978. 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. A hybrid drivetrain with a hydraulic continuously variable transmission cvt is modeled to include efficiency information of the engine and. 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. All electric cars use batteries charged by an external source, leading to the problem of range which is being solved in hybrid electric vehicle. 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. Explore hydraulic hybrid vehicle with free download of seminar report and ppt in pdf and doc format. Most passenger car hybrids have been electricinternal combustion engine models, but other hybrid technologies using hydraulic pumpmotors, flywheels, and. Hybrid electric vehicles use batteries as the rechargeable energy storage system and hydraulic hybrid vehicles use highpressure.
Demonstrated the ease of retrofitting trucks with hydraulic hybrid technology. Optimal design of powersplit transmissions for hydraulic. Varying power component models, energy storage component models, and series or parallel configurations were combined into seven different vehicle configurations. 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. The hydraulic hybrid line provides very high power density.
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. Hydraulic hybrid vehicle configurations and comparison with hybrid electric vehicle conference paper pdf available june 2018 with 1,272 reads how we measure reads. Department of vehicle engineering, national taipei university of technology, 1, sec. A new series hydraulic hybrid vehicle model with a regenerative. Cat how the hybrid excavator system works caterpillar. 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. Epa is leading the development of hydraulic hybrid vehicles.
A variable displacement pump replaces the electric motorgenerator. Hybrid power trains are becoming an increasingly popular way of increasing vehicle efficiency and reducing emissions. The vessel typically carries a flexible bladder of precharged pressurized nitrogen gas. During regeneration the vehicles kinetic energy that is normally lost during braking is captured and used to drive the pumpmotor as a pump. Development of a hydromechanical hydraulic hybrid drive. 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. 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.
Pdf n this paper three basic configurations of hydraulic hybrid vehicle are. New hydraulic hybrid technology developed by epa and ford. The technology uses hydraulic hardware to augment the conventional powertrain engine and. Both hybrid electric and hydraulic hybrid heavyduty vehicles are available, with hybrid electric the most prevalent. The basic models of hydraulic hybrid vehicles are shown and explained. A hybrid vehicle is a vehicle with more than one power source such as a small internal combustion engine and an electric motor. In some systems, a hydraulic transformer is also installed for converting output flow at any pressure with a very low power loss. You can combine the two power sources found in a hybrid car in different ways. How series hydraulic hybrid vehicles work clean automotive. 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 benefits include lower fuel costs, reduced exhaust emissions and a smaller carbon footprintall without any compromise in. 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. Energy efficiency comparison between hydraulic hybrid and. Technologies today have enabled hydraulic machines to harness. Hybrid synergy drive mechanism the original prius used shrinkwrapped 1. Series hybrid in a series hydraulic hybrid, the engine is directly connected to the hydraulic pump with no direct connection to the wheels. Development of hybrid powered hydraulic construction. This is a multiterm project, and the ultimate goal is to convert it into the worlds first hydraulic. Hydraulic hybrid technology for vehicles 27 may 2014 the jsae automotive engineering exposition, jsae. When the vehicle accelerates, fluid in the highpressure. Energy efficiency comparison between hydraulic hybrid. Hydraulic hybrid systems can capture up to 70% of the kinetic energy that would otherwise be lost during braking.
In a regular vehicle, power is provided to the wheels by the engine through the transmission and drive shaft. 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. 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. 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. Both the transmission and system capture more than 71% of a vehicles otherwise lost braking energy to increase brake durability up to eight times.
Therefore, natural concerns of environment and safety promote the uses of waterbased hydraulic hybrid system. The discussion on series hybrid vehicle technology will be continued in two subsequent posts titled. Applicable for both the light and commercial vehicle markets, our creative solutions allow automakers flexibility in committing to propulsion technologies. 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. Hydraulic hybrid vehicle publications transportation.
Hydraulic hybrid vehicles california clean air technology. Hydraulic hybrid vehicles are equipped with an accumulator for energy storage. 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. Hhvs, like all hybrid vehicles, use two sources of power to drive the wheels. Typical hydraulic hybrid system vehicles depend on oil based hydraulic fluid.
The three most common categories of hydraulic hybrid vehicle. In hybrid electric vehicle the engine is the final source of the energy used to power the car. 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. Pdf this paper explains the basic principles of hydraulic hybrid vehicles. The hybrid power systems used in automobiles have been adapted into the construction machinery. Design and analysis of hydraulic hybrid passenger vehicles.
The toyota hybrid system relies on the voltage of the battery packbetween 276 and 288 v. Series hybrid vehicle system design considerations parker. Hydraulic hybrid vehicle seminar report, ppt, pdf for. This energy drives a pump, which transfers hydraulic fluid from a lowpressure reservoir to a highpressure accumulator. Regenerative braking is an energy recovery mechanism which. Hybrid electrical vehicles introduction a hybrid electric vehicle hev has two types of energy storage units, electricity and fuel. In a hydraulic hybrid, pressurized fluid is used as secondary source of power. A hydraulic hybrid vehicle uses hydraulic and mechanical components instead of electrical. It focuses on the power and propulsion systems for these vehicles, including issues related to power and energy management. This ford f550 parallel hydraulic hybrid vehicle was built to demonstrate the benefits of. Mild, full or plugin hybrid technology is on the rise globally opening up a vast array of potential drive architectures. Evaluating the performance of hydraulic hybrid refuse vehicles. Environmental technology environmental technology creates tools to minimize the effect of technology on the development of living things.
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. Development of a hydromechanical hydraulic hybrid drive train. The main focus of this paper is to simulate the potential of water hydraulic technology in hydraulic hybrid system vehicle. Facing the environment problems, the improvement on the efficiency of the construction machinery such as the excavator and wheel loader is highly demanded. Hhvs are hybrid vehicle that use pressurized fluid instead of electric power as alternative power source along with internal combustion engine.
Another hybrid option has been put forth and tested by a number of businesses, as well as the environmental protection agency epa. Hybrid hydraulic vehicles consist of two important part high pressure hydraulic fluid vessels called accumulators, and hydraulic drive pumpmotors. A gaselectric hybrid recovers 30 percent of braking energy, while a hydraulic hybrid can recover 70 percent, contributing to better efficiency source. For technical details, please reference this white paper. There are several major technologies that can, potentially, be used in a hybrid vehicle or more correctly put. The following technical papers and fact sheets provide information about nrels hydraulic hybrid fleet vehicle evaluations. This breakthrough technology can costeffectively reduce emissions and drastically reduce fuel. This is done by capturing otherwise wasted energy and putting it to work in the vehicle. 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.
Introduction to how hydraulic hybrids work howstuffworks. 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. Series hybrid vehicle electrical systems and advantageous series hybrid technology applications. Electric hybrid vehicles have been the first hybrid technology to be mass produced for the commercial passenger car market. 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. Are hydraulic hybrid vehicles the future of driving. Nov 04, 2015 hydraulic hybrid technology, like dana corp. Pdf hydraulic hybrid vehicle configurations and comparison with.
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