Method and device for increasing the injection time or quantity in a load-dependent fashion in fuel ignition systems for internal combustion engines

摘要

Device for increasing the injection time or injection quantity in a load-dependent fashion in fuel injection or feed systems for internal combustion engines, having a first circuit which generates pre-pulses (tp) which are dependent on the engine speeds and air flow rate, which circuit is usually a multivibrator control stage, and having a second circuit which introduces correction variables, generates the final injection pulses (ti) and is connected downstream of said first circuit and is usually a multiplier stage. A load-dependent signal which is either an air flow rate measuring signal (QL) or a pre-pulse (tp) which is generated by the multivibrator control stage, is compared at a comparison stage with predetermined value and in accordance with the comparison an enriching current is produced and additionally fed to the multiplier stage, if appropriate for a limited time, in order to increase the final fuel injection pulses. <IMAGE>