System for driving solenoid valve for internal combustion engine
A system is described for driving a solenoid valve for an internal combustion engine, comprising: (a) a Ti determining means for detecting the operating state of the engine at a predetermined time and determining an output time Ti of an injector ON control signal in accordance with the operating state of the engine; (b) a T storage means for storing a period T of a solenoid valve holding pulse signal; (c) a Tomin storage means for storing a shortest time Tomin required for lifting the solenoid valve; (d) a calculating means coupled to the Ti determining means, the T storage means, and the Tomin storage means, for calculating a solenoid valve holding time which is equal to or shorter than the difference obtained by subtracting Tomin from Ti and which is an integer (N) multiple of T, and calculating an actual solenoid valve lifting time Tone from a difference between the Ti and the solenoid valve holding time; (e) a solenoid valve lifting signal generating means coupled to the calculating means, for generating a solenoid valve lifting signal in accordance with Tone; (f) a solenoid valve holding pulse generating means coupled to the calculating means, for generating N number of solenoid valve holding pulse signals at a predetermined duty ratio and at the period T in accordance with T and N; and (g) a solenoid valve drive circuit coupled to the lifting signal generating means and the holding pulse generating means and controlled in accordance with the solenoid valve lifting signal and solenoid valve holding pulse signal.
- Assignee:
- Honda Giken Kogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4656989
- OSTI ID:
- 6564410
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
COMPUTER CALCULATIONS
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MEMORY DEVICES
OPERATION
PULSES
SIGNALS
SOLENOIDS
VALVES