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JCB’s Ecomax T4 4.4-liter engine, the latest generation of JCB Dieselmax engines, is undergoing in-field testing, the company having focused on meeting Tier-4 interim emission standards without a diesel particulate filter. With second-generation common-rail fuel-injection technology, injection pressures have been raised to 29,000 psi and nozzle-hold geometry has been refined to improve distribution of the fuel within the cylinder. Cooled exhaust gas recirculation is used to clean up exhaust gases before they are passed from the engine.
