The Science Behind Octane Ratings High Octane Fuel, Higher Compression Ratios If you've read How Car Engines Work, you know that almost all cars use four-stroke gasoline engines. One of the strokes is the compression stroke, where the engine compresses a cylinder-full of air and gas into...
As for the displacement, 2.5 litres is what we’d expect, with Mazda already offering a turbo engine of that size in the 6. In the 3’s saloon sibling - where it’s also denied a manual gearbox option - the engine is good for 247bhp when juiced with high-octane fuel. Even if...
Some engines require premium fuel (91 or higher octane) and may experience detonation if you fill the tank with mid-range or regular grade fuel. Under light throttle the engine may run fine on the less expensive fuel, but during hard acceleration or when lugging the engine under load, ...
We tested higher octane fuel than manufacturers require on the Honda CR-V, BMW M5, Ford F-150, and Dodge Charger to see if it impacted acceleration or MPG.
Calculate the exhaust gas composition of a butane-fueled spark-ignition engine operating with equivalence ratio of 0.9. Assume the fuel is fully burned within the cylinder. butane is C4H10. The reference fuels for knock rating of spark ignition engines would include: a. iso-oct...
I had to buy five bucks worth of 91 octane at the track ($7 a gallon) to make sure I could reach the gas station in Byers. Good thing I did, because I’d have fallen eight or ten miles short otherwise. Six sessions was plenty. With the abbreviated seventh session, it added up ...
The fuel's octane rating tells a motorist how much compression the gasoline can tolerate -- the higher the rating, the better the fuel resists combustion. That's why complicated, high-pressure engines require more expensive fuel. These problems can lead to pre-ignition, which is when the ...
Heavy-duty diesel engines have higher peak efficiencies of around 47% due to their superior surface-area-to-volume ratios [78]. Marine engines have still more favorable surface-area-to-volume ratios and low engine speeds, so they operate with even lower heat losses. As a result, marine ...
A. Gas exchange B. Scavenging C. Charging D. Supercharging 未标记13/100 The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the___。 A. inlet nozzle ring B. turbine wheel blade C. ...
The Science Behind Octane Ratings High Octane Fuel, Higher Compression Ratios If you've read How Car Engines Work, you know that almost all cars use four-stroke gasoline engines. One of the strokes is the compression stroke, where the engine compresses a cylinder-full of air and gas into...