Start and termination timing control of fuel injection

Patent · Tue Mar 03 04:00:00 EST 1987

OSTI ID:6721264

Inoue, H; Kondo, T; Isomura, S

A fuel injection system is described for an internal combustion engine, comprising: first sensor means for sensing intake air quantity of the engine; second sensor means for sensing rotational speed of the engine; third sensor means for sensing throttle opening angle of the engine; capacitor means to be charged and discharged by charging and discharging currents respectively; means for initiating charging of the capacitor means at a timing determined by the sensed rotational speed and the sensed throttle opening angle and for charging the capacitor means during a time period determined by the sensed rotational speed; means for initiating discharging of the capacitor means after the charging of the capacitor means and for discharging the capacitor means until the capacitor means is discharged, the discharging current being determined by the sensed intake air quantity and a termination timing of the discharging being determined in accordance with the initiation timing and the discharging current; means for producing a pulse signal in synchronism with the initiation of discharging of the capacitor means, the pulse signal having a time period proportional to the discharging period of the capacitor means; and means for injecting fuel into the engine in response to the pulse signal.

• Assignee: Nippondenso Co., Ltd., Kariya
• Patent Number(s): US 4646698
• OSTI ID: 6721264
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
CAPACITORS
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FLOWMETERS
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GAS FLOW
HEAT ENGINES
INCIDENCE ANGLE
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
METERS
MOTION
PULSES
ROTATION
SIGNALS
TIME DEPENDENCE
TIMING CIRCUITS
VELOCITY