A method for improving the starting ability of an internal combustion engine during an engine start

摘要

The invention relates to a method for improving the starting ability of an internal combustion engine during difficult engine starting conditions.;Since lower than normal engine starting speeds are the result of external circumstances, it is essential that the spark plugs are free from deposits and in their best condi­tion, so as not to hinder an engine start.;The method and arrangement solves this problem by burning-­off any deposits present on the spark plugs (11-14) during the engine start attempt, when difficult engine starting conditions are detected. During the engine start attempt a comparison circuit (5) ascertains whether or not one or more detected engine parameters have a lower value than in normal engine starting conditions. The comparison circuit (5) sends a signal to the control unit (3) controlling the ignition system (2), so that the control unit (3) will initiate the generation of a plurality of sparks instead of a single spark at ignition time points. The resultant spark shower then burns-off any deposits that are present.