Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1980-11-17
1983-10-25
Myhre, Charles J.
Internal-combustion engines
Charge forming device
Fuel injection system
123179L, 123337, 123400, 123491, 123494, 73204, F02D 502
Patent
active
044112343
ABSTRACT:
A fuel system for an internal combustion engine includes a fuel processing unit having at least one foot-actuated, split butterfly valve for controlling induction airflow and a plurality of fuel injectors for spraying fuel into the induction airflow. The split butterfly valve in the fuel processing unit includes a pair of butterfly flaps which rotate in opposite directions in response to throttle movement to insure symmetry of induction airflow through the unit. The butterfly valve is connected to the throttle by a tangential linkage which gradually increases the rate of valve opening responsive to throttle movement to provide smooth response characteristics. The fuel is injected at a temperature and pressure drop selected to produce flash vaporization of the major portion of the fuel in order to promote complete combustion. The injectors are actuated by a control circuit which receives and processes a variety of signals indicative of engine performance and demand, such as engine speed, engine timing, coolant water temperature, mass flow of induction air, and manifold absolute pressure. The mass flow of induction air is measured by a sensing system having a sensing wire positioned in the induction airstream. A current flowing through the sensing wire is automatically adjusted to maintain the temperature of the sensing wire constant. The resistance of the wire is directly proportional to its temperature so that a measurement of the current through the wire is an indication of the mass flow of induction air.
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Advanced Fuel Systems
Dolinar Andrew M.
Myhre Charles J.
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