Device for controlling the fuel-air mixture of an internal combustion engine

Abstract

Abstract A device for controlling the fuel-air mixture of an internal combustion engine with a throttle valve in the air intake system and at least one electronically actuated injection valve for the injection of fuel into the intake pipe comprises a measuring sensor for sensing the position of the throttle valve and generating a corresponding electrical signal and further measuring sensors for the detection of operating parameters of the internal combustion engine, from the electrical output signals of which the operating state of the internal combustion engine is determined in an electronic control device. In the control device lambda values are predetermined for each operating state, which values are converted by this device into corresponding signals for controlling the opening time of the injection valve and the ignition timing of the ignition system. In order, in transient flow operation of the internal combustion engine, to operate the latter with an excess air ratio lambda, in which a higher torque is set whilst adhering to the predetermined exhaust emission values, a control signal is formed in the control device from a signal of the speed measuring sensor and a signal of the throttle valve measuring sensor from a predetermined throttle valve opening angle onwards, by means of which control signal the opening time of the injection valve is determined and the ignition position is shifted to a >>retarded<< ignition point in a direction appropriate to the lambda value.

Inventors

• 👤 Peter Dipl.-Ing. Antony (FH), 7056 Weinstadt
• 👤 Hermann Dr.-Ing. 7300 Esslingen Hiereth
• 👤 Gert Dipl.-Ing. 7012 Fellbach Withalm

Bibliographic Details