Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-01-03
1978-11-14
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
261 36A, 261DIG39, F02M 4102
Patent
active
041251016
ABSTRACT:
A fuel injection system for internal combustion engines that includes a gasoline metering valve to which gasoline is delivered by a fuel pump adapted to maintain a given pressure at a substantially constant rate of flow, and from which gasoline flows at a rate determined by the position of a throttle rod connected with the metering valve. The gasoline leaving the metering valve is conducted under pressure directly to a gasoline distribution block, where it is divided into substantially equal streams for delivery to discharge nozzles that project a narrow spray of finely divided gasoline droplets into the cylinder head intake chambers of the respective cylinders of the internal combustion engine.
Each discharge nozzle and the spray it emits are positioned so that no substantial quantity of gasoline droplets in the narrow spray emitted by the nozzle will come into contact with the interior walls that define the cylinder's individual passage in the intake manifold and the associated intake port.
The angle at which the narrow spray of fine gasoline droplets flares out as it leaves the outlet orifice of each discharge nozzle is small -- no greater than about 10.degree. and preferably no greater than 2.degree. at a distance from the outlet orifice of the nozzle about 40 times the orifice diameter. The width of the spray as it passes through the intake valve opening associated with the nozzle, under the action of the additional vacuum produced in the cylinder by the withdrawing piston, is also specified in terms of the dimensions of the valve opening and the valve stem that is positioned in the opening.
Each discharge nozzle has an outlet orifice of a size selected to produce the desired balance of fuel economy and high performance for the particular engine with which the fuel injection system is used. Orifice sizes are specified for engines of various rated horsepowers or engine displacement according to the type of ground vehicle involved -- from lawn mower and go-cart engines through motorcycles, 4-, 6- and 8-cylinder standard motor vehicles, and 8-cylinder racing cars.
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Garcia Hector L.
Hajdas Edward F.
Dolinar Andrew M.
Garcia Hector L.
Myhre Charles J.
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