Pressure regulating valve
This patent describes a pressure regulating valve for regulating a pressure of fuel to be supplied to a fuel injection device, comprising: a diaphragm chamber having a connecting portion for inducing an intake manifold vacuum in the vicinity of a nozzle hold of the fuel injection device; a fuel chamber having a connecting portion for inducing a fuel and located adjacent to the diaphragm chamber; a diaphragm for partitioning the diaphragm chamber from the fuel chamber; a diaphragm spring accommodated in the diaphragm chamber and biasing the diaphragm toward the fuel chamber; a valve member mounted to the diaphragm; a fuel discharging pipe communicated at its one end with the fuel chamber and communicated at the other end with the outside of the pressure regulating valve, the fuel discharging pipe being provided at its one end with a valve seat against which the valve member is releasably seated, wherein when a fuel pressure in the fuel chamber is equal to or greater than a first set pressure equal to the sum of a set pressure of the diaphragm spring and a pressure in the diaphragm chamber, the valve member moves away from the valve seat, while when the pressure in the fuel chamber is less than the first set pressure, the valve member seats on the valve seat; a temperature sensitive valve having a temperature sensitive spring formed of a shape memory alloy and a valve member operable by the temperature sensitive spring, wherein when a fuel temperature is equal to or greater than a set temperature of the shape memory alloy, the valve member of the temperature sensitive valve closes a fuel passage in the fuel discharge pipe.
- Assignee:
- Aisan Kogyo Kabushiki Kaisha, Obu
- Patent Number(s):
- US 4774923
- OSTI ID:
- 6487660
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
CONTROL
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
OPERATION
PIPES
PRESSURE CONTROL
SHAPE MEMORY EFFECT
SPRINGS
TEMPERATURE DEPENDENCE
VALVES