Importance

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Abstract

In a compression ignition multi-fuel engine employing both port/intake manifold injection of fuel and in-cylinder injection of fuel, the recirculation of exhaust gas to the engine induction system is used to control the temperature and to set the reactivity of an air/fuel charge introduced to the engine for combustion. Fuel directly injected during compression of the charge controls ignition. A variable valve actuator for opening and closing an intake valve extends control over charge pressure and temperature to extend suppression of auto-ignition of the charge. Fuel injection strategy and variable valve actuation are subject to a control strategy to extend the benefits of premixed combustion.

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First Claim