CONTROL APPARATUS OF ENGINE

摘要

A control apparatus of an engine including a cylinder into which a piston is reciprocatably fitted is provided. The apparatus includes a fuel injector, a water injector, and a controller. The controller includes an engine load determining module for receiving a parameter and determining whether an engine operating range is within a low high load range or a high load range. Within the low load range, the controller controls the fuel injector to inject fuel into a center region of a combustion chamber. Within the high load range, the controller controls the fuel injector to inject the fuel in a period between a latter half of compression stroke and an early half of expansion stroke, and the water injector to inject supercritical water or subcritical water toward a crown surface of the piston in a period that is after the injection and before a mixture gas ignition.

主权项

1. A control apparatus of an engine including an engine body and a cylinder into which a piston is reciprocatably fitted, comprising:
a fuel injector for injecting fuel into a combustion chamber formed inside the cylinder; a water injector for injecting one of supercritical water and subcritical water into the combustion chamber; and a controller for controlling various parts of the engine, the various parts including the fuel injector and the water injector, wherein the water injector is attached to a predetermined position of the engine body to be capable of injecting the one of the supercritical water and the subcritical water toward a crown surface of the piston, wherein the controller includes an engine load determining module for receiving at least a parameter of a load of the engine obtained based on an accelerator opening, and determining whether an operating range of the engine body is within a low load range where the engine load is a predetermined reference load or below or a high load range where the engine load is above the predetermined reference load, wherein when the engine body is operated within the low load range, the controller outputs a control signal to the fuel injector to inject the fuel into a center region of the combustion chamber so as to form an air layer within an outer circumferential region of the combustion chamber, and wherein when the engine body is operated within the high load range, the controller outputs a control signal to the fuel injector to inject the fuel in a period between a latter half of compression stroke and an early half of expansion stroke, and the controller outputs a control signal to the water injector to inject the one of the supercritical water and the subcritical water toward the crown surface of the piston in a period that is after the fuel injection and before an ignition of mixture gas containing the fuel and air.