Search results
Results from the WOW.Com Content Network
A 48 V system can provide more power, improve energy recuperation, [7] and allow up to an 85% decrease in cable mass. [10]12-volt systems can provide only 3.5 kilowatts, while a 48 V power could achieve 15 to 20 kW or even 50 kW. 48 volts is below the level that is considered safe without special protective measures.
New efficiency and pollution standards rely on the purchase of new vehicles, often as the current vehicles already on the road reach their end-of-life. Only a few nations set a retirement age for old vehicles, such as Japan or Singapore , forcing periodic upgrading of all vehicles already on the road.
The term "electric car" typically refers specifically to battery electric vehicles (BEVs) or all-electric cars, a type of electric vehicle (EV) that has an onboard rechargeable battery pack that can be plugged in and charged from the electric grid, and the electricity stored on the vehicle is the only energy source that provide propulsion for ...
The set-up process for vehicles ahead of the test. The last two are stricter than in the NEDC protocol, since they were previously used by car manufacturers to their advantage to keep CO 2 values (legally) as low as possible. [11] The procedure does not indicate fixed gear shift point, unlike the NEDC, letting each vehicle use its optimal shift ...
The following table compares official EPA ratings for fuel economy (in miles per gallon gasoline equivalent, mpg-e or MPGe, for plug-in electric vehicles) for series production all-electric passenger vehicles rated by the EPA for model years 2015, [1] 2016, [2] 2017, [3] and 2023 [4] versus the model year 2016 vehicles that were rated the most efficient by the EPA with plug-in hybrid ...
If energy output and input are expressed in the same units, efficiency is a dimensionless number. [1] Where it is not customary or convenient to represent input and output energy in the same units, efficiency-like quantities have units associated with them. For example, the heat rate of a fossil fuel power plant may be expressed in BTU per ...
The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.
An electric induction motor is required to have a specified minimum full-load efficiency. A compact fluorescent lamp is required to start and run up to near full brightness in a given time, to have a minimum life of several thousand hours, to maintain its output within specified limits, to withstand a certain number of switchings, to have a ...