ES394005A1 - Timing circuit for opening fuel injection valves - Google Patents

Abstract

Improvements in fuel injection installations for internal combustion engines, especially for automobile engines that work with injection to the suction pipe, with an electronic control installation, which determines the opening time of a minimum electromagnetic injection valve, which It contains a preferably monostable multivibrator, in which the duration of its output pulses can be regulated depending on a service parameter of the internal combustion engine at least -especially depending on the suction air pressure prevailing in the suction behind the throttle valve - and with an electronic pulse extension step connected to the multivibrator, which supplies an extension pulse each time following a multivibrator output pulse, the duration of which depends on the duration of the previous output pulse, and also with a monostable connection step e connected to the multivibrator and which has a connection time determined by its unstable state that turns out to be only a fraction of the extension pulse that starts simultaneously with it, characterized by the fact that the connection step is connected to the socket of a voltage divider, preferably adjustable, which temporarily influences the pulse extension stage in the shortening or extension direction. (Machine-translation by Google Translate, not legally binding)