Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1990-05-11
1991-02-05
Kamen, Noah P.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
134 20, 134 30, 134169A, F02B 7700
Patent
active
049895613
ABSTRACT:
The present invention is a method and apparatus to clean the intake system of an internal combustion engine including the intake valves. An air metering block is connected to the intake manifold of the engine by means of an adaptor tube. The only air that can get into the intake manifold of the engine is through inlet ports in the air metering block. An air adjusting screw selectively uncovers the inlet ports to vary the amount of air which can be introduced into the intake manifold. An electrically operated injector is fitted in the air metering block to inject solvent directly into the intake manifold. An adjustable injector driver varies the duty cycle or the on time of the injector to control the amount of flow of solvent into the intake manifold. A pumping unit is provided to pump solvent from a holding tank, through the injector, into the intake manifold. The normal fuel flow to the engine is disconnected such that the engine runs on combustion of the solvent introduced by the injector through the air metering block. The engine continues to operate until the predetermined amount of solvent has been burned.
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"Intake Valve Deposits--Fuel Detergency Requirements Revisited" by Bitting, et al., published by Society of Automotive Engineers, SAE Technical Paper No. 872117, published Nov. 2, 1987.
"Mechanism of Intake--Valve Deposit Formation Part 1: Characterization of Deposits" by Esaki, et al., published by Society of Automotive Engineers, SAE Technical Paper No. 900151, published Feb. 26, 1990.
"Mechanism of Intake--Valve Deposit Formation Part 2: Simulation Tests" by Nomura, et al., published by Society of Automotive Engineers, SAE Technical Paper No. 900152, published Feb. 26, 1990.
Burrows Joel L.
Clack Sidney R.
Hein Steven R.
Kamen Noah P.
Precision Tune, Inc.
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