Coordinated water and fuel injection system

Internal-combustion engines – Water and hydrocarbon

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Details

123 25A, 123 25N, F02B 4702

Patent

active

051487764

ABSTRACT:
A fuel and water injection system for an internal combustion engine in which a computer calculates the minimum fuel requirements to meet power demand and the water injection requirements to achieve smooth operation without engine knock or pre-ignition; and triggers electronic injectors mounted in the intake manifold or adjacent to the cylinders to achieve those requirements. Fuel and water injectors are connected to constant-pressure fluid supply systems such that the rate of delivery of liquid to the inlet manifold or cylinder is based on the pulse width and pulse repetition rate of the signals sent from the computer. The fuel/air ratio ranges from the minimum requirement to support the combustion process to the maximum which can be burned cleanly and efficiently. Fuel injection rates within these limits are based on the operator's demand for power as represented by his positioning of the throttle plate using the accelerator. Water injection rates are based on the amount of cooling which must be applied to prevent the heat generated during the compression stroke from igniting the fuel/air mixture prematurely. The result is an engine which burns more cleanly and efficiently and suffers no side effects commonly associated with lean-burning engines.

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patent: 4960080 (1990-10-01), O'Neill

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