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A Ford Excursion SUV next to a Toyota Camry compact. Sport utility vehicles (SUVs) have been criticized for a variety of environmental and automotive safety reasons. The rise in production and marketing of SUVs in the 2010s and 2020s by auto manufacturers has resulted in over 80% of all new car sales in the United States being SUVs or light trucks by October 2021. [1]
Fuel economy at various driving speeds. Maintaining an efficient speed is an important factor in fuel efficiency. [9] [10] Optimal efficiency can be expected while cruising at a steady speed and with the transmission in the highest gear (see Choice of gear, below). The optimal speed varies with the type of vehicle, although it is usually ...
Cadillac Eldorado cold start. A cold start is an attempt to start a vehicle's engine when ambient temperatures are much lower than its normal operating temperature. [1] A cold start can be difficult for an engine due to higher viscosity of oil and fuel in cold temperatures.
The size effect of the Stirling engine is due to its reliance on the expansion of a gas with an increase in temperature and practical limits on the working temperature of engine components. For an ideal gas, increasing its absolute temperature for a given volume, only increases its pressure proportionally, therefore, where the low pressure of ...
These are the SUVs that get the best gas mileage for 2024. ... That 38 mpg comes from a turbocharged 1.6-liter inline-six gas engine paired to an electric motor, both powering the front wheels ...
Though vehicle fuel efficiency has increased within each category, the overall trend toward less efficient types of vehicles has offset some of the benefits of greater fuel economy and reduction in carbon dioxide emissions. [5] Without the shift towards SUVs, energy use per unit distance could have fallen 30% more than it did from 2010 to 2022. [6]
In early June, Toyota announced the recall of nearly 100,000 Tundra pickups and about 3,500 Lexus luxury SUVs to fix a problem that could cause their engines to lose power while driving.
By some estimates, an automobile with a 3-liter engine burns 0.4 gallons of gas per hour of idling, and generates a little over a pound of CO² every 10 minutes. [6] Idle reduction is particularly significant for vehicles in heavy traffic and trucks at the estimated 5,000 truck stops in the US. [7]