UC Riverside researchers are combining connected vehicle technology and evolutionary algorithms to make PHEVs more efficient
Engineers at the University of California, Riverside have taken inspiration from biological evolution and the energy savings garnered by birds flying in formation to improve the efficiency of plug-in hybrid electric vehicles (PHEVs) by more than 30 percent.
Titled “Development and Evaluation of an Evolutionary Algorithm-Based Online Energy Management System for Plug-In Hybrid Electric Vehicles,” a paper describing the research was recently accepted for publication in the journal IEEE Transactions on Intelligent Transportation Systems. The work was led by Xuewei Qi, a postdoctoral researcher at the Center for Environmental Research and Technology (CE-CERT) in UCR’s Bourns College of Engineering, and Matthew Barth, CE-CERT director and a professor of electrical and computer engineering at UCR.
PHEVs, which combine a gas or diesel engine with an electric motor and a large rechargeable battery, offer advantages over conventional hybrids because they can be charged using mains electricity, which reduces their need for fuel. However, the race to improve the efficiency of current PHEVs is limited by shortfalls in their energy management systems (EMS), which control the power split between engine and battery when they switch from all-electric mode to hybrid mode.
While not all plug-in hybrids work the same way, most models start in all-electric mode, running on electricity until their battery packs are depleted, then switch to hybrid mode. Known as binary mode control, this EMS strategy is easy to apply, but isn’t the most efficient way to combine the two power sources. In lab tests, blended discharge strategies, in which power from the battery is used throughout the trip, have proven more efficient at minimizing fuel consumption and emissions. However, their development is complex and, until now, they have required an unrealistic amount of information upfront.
“In reality, drivers may switch routes, traffic can be unpredictable, and road conditions may change, meaning that the EMS must source that information in real-time,” Qi said.
The highly efficient EMS developed and simulated by Qi and his team combines vehicle connectivity information (such as cellular networks and crowdsourcing platforms) and evolutionary algorithms—a mathematical way to describe natural phenomena such as evolution, insect swarming and bird flocking.
“By mathematically modeling the energy saving processes that occur in nature, scientists have created algorithms that can be used to solve optimization problems in engineering,” Qi said. “We combined this approach with connected vehicle technology to achieve energy savings of more than 30 percent. We achieved this by considering the charging opportunities during the trip—something that is not possible with existing EMS.”
The current paper builds on previous work by the team showing that individual vehicles can learn how to save fuel from their own historical driving records. Together with the application of evolutionary algorithms, vehicles will not only learn and optimize their own energy efficiency, but will also share their knowledge with other vehicles in the same traffic network through connected vehicle technology.
“Even more importantly, the PHEV energy management system will no longer be a static device—it will actively evolve and improve for its entire life cycle. Our goal is to revolutionize the PHEV EMS to achieve even greater fuel savings and emission reductions,” Qi said.
Receive an email update when we add a new ELECTRIC VEHICLES article.
The Latest on: Plug-in hybrid electric vehicles
via Google News
The Latest on: Plug-in hybrid electric vehicles
- Business lobby accuses Victoria of ‘putting cart before the horse’ with electric vehicles taxon April 11, 2021 at 11:04 am
Australian Industry Group calls for moratorium on EV taxes, warning extra costs will deter consumers and curb efforts to lower emissions ...
- Explainer: Grants cut for plug-in hybrids and electric carson April 11, 2021 at 9:45 am
So, what’s happening with electric vehicle grants? They’re being reduced. The Government has announced that it is trimming grants given to buyers of plugin-hybrid electric vehicles (PHEVs) from July ...
- Electric and hybrid car sales continue to increaseon April 9, 2021 at 3:21 am
The CSO said the number of new electric cars licensed from January to March 2021 grew by 54.8% from 1,495 to 2,314. New Plug-in hybrid electric (PHEV) cars licensed more than doubled - increasing by ...
- 7 Electric Vehicle Stocks for a Carbon-Neutral Worldon April 8, 2021 at 11:34 am
Electric vehicle (EV) stocks have been hot over the past year. Currently, Tesla is regarded as one of the most successful names in the drive to electrification. However, lately even more established, ...
- Plug-in Hybrid Electric Vehicles (PHEV) Market size in terms of volume and value 2021-2026on April 8, 2021 at 2:36 am
The MarketWatch News Department was not involved in the creation of this content. Apr 08, 2021 (MARKITWIRED via COMTEX) -- A Plug-in Hybrid Electric Vehicle (PHEV) is a vehicle which comprises of ...
- Maximizing Electric Cars' Range in Extreme Temperatureson April 7, 2021 at 5:18 am
Extreme weather - very hot or very cold - impacts range in EVs. The additional heating or cooling needed for passenger comfort requires more energy than more moderate temperatures would. Cold ...
- Hybrid electric vehicles to account for 30% of market by 2030on April 7, 2021 at 5:03 am
Hybrid electric vehicles (HEV), which have maximum fuel economy, low emissions and smooth operation, are suited to Vietnam’s climate and transport conditions, experts say.
- Electric Vehicle Battery Swapping Market to Reach $409.99 Mn, Globally, by 2027 at 22.3% CAGR: Allied Market Researchon April 6, 2021 at 6:50 am
Hybrid Electric Vehicle, and Plug-in Hybrid Electric Vehicle), Battery Type (Lead Acid Battery, Nickel Metal Hydride Battery, and Lithium ion Battery), and Vehicle Type (Passenger Car, Commercial ...
- From Sedans to Crossovers, These Are the Best Electric Cars for Familieson April 5, 2021 at 5:00 am
It's been a really hot year for the electric car market with Ford, Volkswagen,, Hyundai, Volvo, Audi and others either expanding their offerings and making exciting upgrades. For over 10 years, the ...
via Bing News