EXHAUST PURIFICATION SYSTEM FOR WORKING MACHINE
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United States of America Patent
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Issued Date -
Nov 28, 2013
app pub date -
Feb 27, 2012
filing date -
Apr 15, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An exhaust purification system for a working machine reliably issues filter regeneration warnings to the operator, prompting manual regeneration, so that damage to the DPF device can be avoided. When a PM estimate becomes higher than a given value, a screen displays a warning message prompting manual regeneration. If the warning message fails to prompt the operator to perform manual regeneration and reference time t1 has passed since the display of the warning message, a speaker outputs a first warning sound. When the operator notices the first warning sound and turns on a regeneration switch, regeneration control is started. If the operator fails to notice the first warning sound and reference time t2 passes, the speaker instead outputs a second warning sound louder than the first warning sound. When the operator notices the second warning sound and turns on the regeneration switch, regeneration control is started.
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