Apparatus for controlling fuel injection timing of fuel injection apparatus

Patent · Tue Oct 21 04:00:00 EDT 1986

OSTI ID:7195867

Hirano, Y; Inoue, K; Yasuhara, S

This patent describes an apparatus for controlling the fuel injection timing of a fuel injection device for an internal combustion engine. The engine has a sensor for producing an electric signal indicating the fuel injection timing in response to the fuel pressure at the time of fuel supply and an adjusting means for adjusting the fuel injection timing of a fuel injection pump. The engine also includes a first output means responsive to at least the electric signal for generating a control signal applied to the adjusting means in order to carry out feedback control of the fuel injection timing. The apparatus comprises: a first means for generating a first signal relating to the rotational speed of the internal combustion engine to which fuel is supplied from the fuel injection pump; a second means for generating a second signal relating to the load on the internal combustion engine; a detecting means for detecting whether or not the electric signal is being produced by the sensor; a discriminating means responsive to the first and second signals and the output signals from the detecting means for discriminating whether or not the sensor is functioning properly; a second output means for generating a back-up control signal for controlling the fuel injection by open-loop control; a switch-over means for providing the back-up control signal to the adjusting means in place of the control signal in order to switch over the fuel injection timing control mode from feed-back control; and means for giving an indication when a sensor malfunction has been discriminated by the discriminating means.

• Assignee: Diesel Kiki Co., Ltd.
• Patent Number(s): US 4617902
• OSTI ID: 7195867
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FEEDBACK
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MOTION
PRESSURE EFFECTS
PUMPS
ROTATION
SIGNALS
SWITCHES
TIMING CIRCUITS
VELOCITY