Fuel injection system uses air-bled nozzles
A microprocessor-controlled fuel injection system known as ''Pijet'' has been developed by researchers at Piper FM Ltd. It is explained that air and fuel are mixed in the fuel injectors and the mixture is distributed to each cylinder via ''natural selection.'' The system consists of integrated primary pressure pump and pressure relief valve; control box, integrated with the throttle valve housing and containing throttle angle sensor and fuel metering slot valve; solenoid-operated fuel metering pulser and fuel accumulator; fuel injectors; electronic control module; engine speed sensor; and engine, air temperature, and barometric pressure sensors. It is pointed out that the Pijet system has been used successfully in a number of European and Japanese cars ranging from 1.1 to 2.0 L with operating mileage from 5000 to 30,000 miles. The application of inertia-ram tuned induction systems has shown maximum torque increases of 10-15% with a torque spread increase of 1200 rpm into the low speed range.
- Research Organization:
- Piper FM Ltd.
- OSTI ID:
- 5866981
- Journal Information:
- SAE Prepr.; (United States), Vol. 91:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FUEL INJECTION SYSTEMS
COMPUTERIZED CONTROL SYSTEMS
NOZZLES
AUTOMOBILES
CONTROL EQUIPMENT
METERS
MICROPROCESSORS
PRESSURE CONTROL
PUMPS
RELIEF VALVES
TEMPERATURE MEASUREMENT
TORQUE
COMPUTERS
CONTROL
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
EQUIPMENT
FLOW REGULATORS
FUEL SYSTEMS
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
VALVES
VEHICLES
330100* - Internal Combustion Engines