Automotive fuel system
AssigneeFuel Concepts of America, Inc.
InventorsC. Joseph Ghafari, Roy Martin
Life of this patent
Estimating the term…
Abstract
A PCV circuit for an internal combustion engine is modified to deliver the PCV fluid to an atomization chamber which also receives fuel from an electronic fuel injector tapped into the main vehicle fuel supply. The fuel from the injector is thoroughly vaporized in and/or immediately downstream of the chamber and conveyed to the vehicle intake manifold. A switch cuts off operation of the fuel injector at high load/high throttle setting conditions. The injector operates at a constant frequency with a selected ON time.
Claims14
A fuel system for an internal combustion engine of the type having a vacuum intake circuit between a crankcase and an intake manifold comprising:
- a vaporization chamber;
- an electronic fuel injector connected to meter fuel from a source into the vaporization chamber;
- the vaporization chamber being connected such that, when the engine is in operation, fluid from the vaporization chamber is delivered to the engine;
- and a pressure switch associated with the injector to stop operation thereof at a predetermined engine operating condition wherein the condition is a high load or substantially full throttle combination.
An automotive power plant comprising:
- an internal combustion engine having an air intake, a crankcase and a PCV circuit connected between the crankcase and the intake;
- a fuel source;
- a vaporization chamber;
- an electronic fuel injector connected to meter fuel from a source into the vaporization chamber;
- input and output ports associated with the vaporization chamber for connection to the PCV circuit and the intake, respectively such that, when the engine is in operation, PCV fluid circulates through the vaporization chamber to carry vaporized fuel from the injector to the intake;
- and a pressure switch associated with the injector to stop operation thereof at a predetermined engine operating condition wherein the condition is a high load or substantially full throttle combination.
A method of operating an internal combustion engine having a vacuum intake circuit including at least a PCV circuit, an intake mixture sensor and a controllable fuel delivery system comprising the steps of:
- conveying fluid from the circuit into a vaporization chamber;
- metering fuel into the vaporization chamber;
- vaporizing the fuel metered into the vaporization chamber;
- and
- conveying the vaporized fuel and fluid from the circuit together to the engine intake at a predetermined engine operating condition being a high load or substantially full throttle combination.
Dependencies are inferred from the claim text.