| 摘要 |
<p>Provided is an engine control system for a work machine that is capable of correctly measuring the sulfur content of exhaust gas, which is detrimental to the normal operation of exhaust gas aftertreatment devices, and of reducing sulfur poisoning in exhaust gas aftertreatment devices. Each time an engine is started by a key switch (46) being turned ON, the amount of remaining fuel as stored from the previous time the engine stopped and the amount of remaining fuel as detected during the current engine startup are compared and sulfur content concentration measurement processing is performed only if the amount of remaining fuel has increased. In this processing, the rotational speed of an engine (1) is forcibly controlled to be fixed at a target rotational speed (Na) suitable for measuring sulfur concentration, an assessment is made to determine if the sulfur concentration is at or above a threshold value when the temperature of the exhaust gas is in a prescribed temperature range (Texa-Texb) suitable for measuring sulfur concentration and a target amount of time (Ta) has elapsed, and if the sulfur concentration is at or above the threshold value, a warning display device (42) is activated.</p> |
