Fuel injection control based on spill port opening timing correction
This patent describes a fuel injection control system for an internal combustion engine, comprising: (a) a fuel injection pump including: a pump chamber; a low pressure chamber; plunger means reciprocating in synchronism with rotation of the engine for introducing fuel into the pump chamber, and for feeding the fuel under pressure from the pump chamber to a cylinder of the engine, detector means for detecting a reference position of the plunger, and for generating a detection signal indicative of the reference position, and a spill port coupled to the pump chamber and in communication with the low pressure chamber, (b) solenoid valve means for opening and closing the spill port; (c) first circuit means including first and second adjusting resistors, the first circuit means being replaceably disposed on the fuel injection pump; (d) first control means for calculating a fuel injection time period according to operating conditions of the engine; (e) second control means including second circuit means comprising first and second fixed resistors, the first fixed resistor being connected to the first adjusting resistor so as to produce a first voltage signal corresponding to a ratio of a resistance value of the first adjusting resistor to a resistance value of the first fixed resistor.
- Assignee:
- Nippondenso Co., Ltd., Kariya and Toyota Jidosha Kabushiki Kaisha, Toyota
- Patent Number(s):
- US 4766864
- OSTI ID:
- 6526388
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
CORRECTIONS
DESIGN
DUCTS
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
PUMPS
TIMING PROPERTIES
VALVES