Toyota put new engines on the Atkinson diet
Posted on 10-04-2014 at 17:22 by Ricardo – 19 Comments”
Toyota brings in the coming time, a new slew of engines on the market. In place of rigorous downsizing and turbotechniek the Japanese for another surgery to cut curb: the Atkinson method.
The first two benzineblokjes from the new engine family include a 1.0 – and 1.3-liter four-cylinder. The engines are 10 percent more fuel efficient, says Toyota, but more interesting is the way in which.
Different in – and exhaust stroke
In addition to the generation of a high compression in the cylinders Toyota has the Atkinson cycle is applied, based on the invention of the Brit James Atkinson (1846-1914) in which in – and exhaust stroke of a different length. This is actualized by an inlet valve at the moment and remains open as the piston goes up to the compression stroke to start. Because the intake valve later close is this battle effectively shorter that the arbeidsslag. Magic happens, and then there is a return from the fuel mixture reached. Those who want to know more about: we have an explanation in GIFJES and on VIDEO.
Less power
The disadvantage of the Atkinson method is that the less power savings. Toyota used the however, for years when the Prius and other hybridemodellen, because the vermogensdaling there can be absorbed by the electric motor. For Toyota’s newest engine family, however, have a method found to be without e-power the loss of power to tackle.
Toyota gives the engines a cooled exhaust gas recirculation system (EGR), new intake ports to a vertical air-fuel swirl’ to create and custom nokkenastiming. Together with the higher compression, would the 1.3-liter block with a thermal efficiency of 37%. The 1.0 version is on 37%, two percent more than the engines they will replace.
Toyota has not yet specified which models the engines will debut. Presumably, the two announced engines in non-hybrids for the Japanese market. By 2015, the brand 14 new engines with the Atkinson technique was introduced.
The vertical air-fuel swirl
