Method of injecting fuel under electronic control

Abstract

Abstract PURPOSE: In an electronically controlled fuel injector which operates the fuel injection valve of an intake line, to keep the operation of an engine good at its low temperature, by controlling the injected quantity of fuel for the engine at the low temperature in terms of the difference between the detected torque of the engine and a set optimal level. CONSTITUTION: An electronic controller 15 calculates the injected quantity of fuel on the basis of inputs from a throttle switch 16, a water temperature sensor 18, a negative pressure sensor 19, a crank angle sensor 23 and an air fuel ratio sensor 25 and generates a signal corresponding to the injected quantity. If the output torque T of an engine is lower than a prescribed optimal level without using an air fuel ratio signal at the low temperature of the engine, a predetermined value is added to an injection time pulse to increase the injected quantity of fuel. The output torque is calculated from the pumping average effective pressure Pp, friction average effective pressure Pf and integrated value Pi of pressure in the combustion chamber in one cycle. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Keiji Aoki
• 👤 Shinji Ikeda

Bibliographic Details