Method and device for internal combustion engine condition sensing and fuel injection control

Patent · Tue Apr 01 04:00:00 EST 1986

OSTI ID:5856727

Isobe, T; Kobayashi, N

A control device is described for an internal combustion engine, consisting of: an intake air temperature sensor for detecting the temperature of intake air taken into the engine; a throttle sensor having an idle switch for detecting whether a throttle valve of the engine is within an idle opening range, and having a potentiometer for generating a voltage output in proportion to an opening of the throttle valve; an intake air pressure sensor for detecting intake air pressure corresponding to pressure in a surge tank of the engine; injectors for controllably injecting fuel into the engine; a top dead center sensor and a crank angle sensor for respectively outputting a top dead center signal and a crank angle signal in accordance with distributor shaft rotation of the engine; a coolant temperature sensor for sensing engine coolant temperature; and a digital control circuit for determining a basic fuel injection time in accordance with intake air pressure detected by the intake air pressure sensor and engine rotational speed the control circuit determines based on the crank angle sensor signal, for correcting the basic fuel injection time in accordance with the throttle sensor voltage output, intake air temperature detected by the intake air temperature sensor and engine coolant temperature detected by the coolant temperature sensor, for reading the engine coolant temperature at a substantially bottom dead center crank angle in accordance with distributor shaft rotation of the engine, and for using the corrected basic fuel injection to determine fuel injection time for injection control of the injectors.

• Assignee: Toyota Jidosha Kabashiki Kaisha, Toyota
• Patent Number(s): US 4580221
• OSTI ID: 5856727
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
COOLANTS
ELECTRIC MEASURING INSTRUMENTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GAS FLOW
HEAT ENGINES
INCIDENCE ANGLE
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
MOTION
POTENTIOMETERS
PRESSURE GAGES
ROTATION
SIGNALS
SWITCHES
THERMOMETERS
VALVES