The cetane number is a measure of a fuel´s tendency to ignite in the absence of an ignition source (flame or spark).
In D-4 direct injection, fuel and air is injected directly into the cylinder, instead of mixing it in the intake port which is how conventional fuel injection works.
Vehicles using this technology combine the agility of standard legacy hybrids, like the Toyota Prius, with the added benefits of being able to add electrically-fueled mileage by charging up powerful and capacious add-in batteries, enabling vehicles to attain effective mileage rates in the triple digits.
How to save money by improving fuel economy and performance in any vehicle by up to 30% or more without expensive gadgets. Gas Mileage Bible is a must for anyone who drives a car. Simple scientific explanations on what causes losses and gains in fuel economy. Clear-cut gas-saving solutions, breaking down into straightforward categories: "no tech", "low tech", and "high tech".
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