초록 ▼

An engine control system having an oxygen density sensor arranged in an intake system at a position downstream of a throttle valve for detecting the amount of air newly introduced into the engine. The sensor is a limit electric current detection type capable of detecting a continuously changing dens

An engine control system having an oxygen density sensor arranged in an intake system at a position downstream of a throttle valve for detecting the amount of air newly introduced into the engine. The sensor is a limit electric current detection type capable of detecting a continuously changing density of the oxygen. An amount of fuel to be injected is calculated in accordance with the output level of the sensor by using mapped data of the output level of the sensor signal. A precise detection of new air is made possible while maintaining the advantages of the known D-J system. An ignition timing also may be calculated by the signal from the oxygen sensor.

대표청구항 ▼

An internal combustion engine comprising: an engine body; an intake system connected to the engine body for introducing air thereto from outside the engine, the system including a throttle valve for controlling the amount of air introduced; an exhaust system connected to the engine body for removing

An internal combustion engine comprising: an engine body; an intake system connected to the engine body for introducing air thereto from outside the engine, the system including a throttle valve for controlling the amount of air introduced; an exhaust system connected to the engine body for removing resultant combustion gas therefrom; sensor means arranged in the intake system at a position downstream of the throttle valve, said sensor means being responsive only to the partial pressure of oxygen in the air newly introduced from outside the engine and providing an electrical signal indicating the amount of new air introduced; calculating means, responsive to the sensed amount of new air introduced, for calculating values of an engine operational characteristic to be controlled as a function of the amount of newly introduced air; and control means, responsive to the calculated engine operational characteristic value, for controlling the engine operational characteristic as a function of the amount of newly introduced air.