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The 2.3 L KJ-ZEM is one of Mazda's most technologically advanced engines. It employs the "Miller cycle" which uses a supercharger to decrease compression losses and increase power. It was used in the T-platform cars. The supercharger used is the twin-screw type with electronic boost control. Power output was 217 hp (162 kW) and 210 ft·lbf (280 N·m). The KJ-ZEM was on the Ward's 10 Best Engines list for 1995 through 1998.
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Saullius Pranešimo tema: Re: KJ-ZEM variklisParašytas: 11 Kov 2008 20:51
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fatmann Pranešimo tema: Re: KJ-ZEM variklisParašytas: 11 Kov 2008 21:32
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Miestas: Vilnius O ką tau apie juos žinot reikia? Į mx'ą jo neįkiši. O millerio ciklas grubiai - kažkaip ne tuo laiku kaip turėtų, atsidaro ar užsidaro vožtuvai, o tam, kad kompensuotų prarandamą galią, įdėtas kompresorius.
The Miller-cycle engine employs one of the most efficient positive displacement superchargers on Earth – a Lysholm screw-type blower, which pumps in up to 14 psi of boost via twin-air-to-air intercoolers. This is one of the world’s most sophisticated engines – even by today’s standards.
Displacing 2.3 litres, the KJ-series Miller-cycle engine uses an 8.0:1 static compression ratio, DOHC, 24 valves and multi-point injection to help it on its way to 149kW at 5500 rpm and 282Nm at 4000 rpm. To ensure flexible performance, 275Nm of torque is available from 2000 to 5500 rpm.
A Miller-cycle engine is very similar to an Otto-cycle engine. The Miller-cycle uses pistons, valves, a spark plug, etc., just like an Otto-cycle engine does. There are two big differences:
A Miller-cycle engine depends on a supercharger.
A Miller-cycle engine leaves the intake valve open during part of the compression stroke, so that the engine is compressing against the pressure of the supercharger rather than the pressure of the cylinder walls. The effect is increased efficiency, at a level of about 15 percent.
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gintaris Pranešimo tema: Re: KJ-ZEM variklisParašytas: 11 Kov 2008 22:03
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