Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1996-06-05
1997-05-20
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Fuel injection system
13762511, F02M 4100, F16K 11076
Patent
active
056303980
ABSTRACT:
A stepped rotation fuel distribution valve for receiving and conducting metered, pressurized fuel pulses to the combustion cylinders of a diesel engine is provided. The valve includes a fuel distribution shaft rotatably mounted in a valve housing. The shaft includes a fuel discharge port that is sequentially registrable with fuel distributing passages in the housing that ultimately lead to the diesel fuel injectors associated with the combustion cylinders of the engine. A drive mechanism, which may include a stepper motor, intermittently rotates the fuel distributor shaft so that the shaft discharge port dwells in registration with one of the fuel distributing passages at the time a pressurized pulse of fuel is discharged through the shaft discharge port. The drive mechanism may also include either a set of timing gears or a spring coupling to achieve the desired intermittent rotation. In all cases, the intermittent rotation of the fuel distribution shaft prevents the shaft from rotating at a time when the discharge of a highly pressurized fuel pulse applies a high side load to the shaft which in turn can generate high frictional forces between the fuel distribution shaft and the surrounding housing.
REFERENCES:
patent: 3972350 (1976-08-01), Pickett
patent: 4363211 (1982-12-01), Robinson et al.
patent: 4426911 (1984-01-01), Robinson et al.
patent: 4428511 (1984-01-01), Howell
patent: 5341834 (1994-08-01), Doherty et al.
Cavanagh Mark S.
Gant Gary L.
Muntean George L.
Wilson Harry L.
Youngblood John R.
Cole Thomas W.
Cummins Engine Company, Inc.
Leedom Jr. Charles M.
Moulis Thomas N.
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