Apparatus for controlling fuel injection advance angle of a fuel injection pump

Patent · Tue Jun 03 04:00:00 EDT 1986

OSTI ID:5635987

Fujimori, K; Ichikawa, T

An apparatus is described for controlling a fuel injection advance angle of a fuel injection pump having a hydraulic type timer with a solenoid valve connected with an injection advance angle adjusting member of the fuel injection pump. The apparatus consists of: a first means for generating a first signal showing a target injection advance angle for closed-loop control for the condition of operation of an internal combustion engine associated with the fuel injection pump; a second means for generating a feedback signal related to the actual injection advance angle; a third means responsive to the first signal and the feedback signal for producing a first control signal for controlling the solenoid valve so as to be in one state of opening or closing when the actual injection advance angle is substantially coincident with the desired target injection advance angle, and to be in the other state of opening or closing when they are not substantially coincident; means for generating a second signal showing the target injection advance angle for open-loop control according to the condition of operation of the internal combustion engine; means responsive to the second signal for generating a second control signal, which is a pulse signal having a duty cycle determined in accordance with the second signal, for controlling the average opening of the solenoid valve so as to obtain the optimum injection advance angle; a detecting means for detecting whether or not the feedback signal is in normal condition; and a signal changeover means which is responsive to the result detected by the detecting means and supplies the first control signal to the solenoid valve when the feedback signal is in normal condition and supplies the second control signal to the solenoid valve when the feedback signal is not in the normal condition.

• Assignee: Diesel Kiki Co., Ltd.
• Patent Number(s): US 4592327
• OSTI ID: 5635987
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FEEDBACK
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INCIDENCE ANGLE
INTERNAL COMBUSTION ENGINES
PUMPS
SIGNALS
SOLENOIDS
TIMING CIRCUITS
VALVES