Patent ID: 7062907

Claim:
A regeneration control system for an engine comprising: an exhaust particulate collecting section configured to collect particulate matter from exhaust gas from the engine; a regeneration control section configured to conduct regeneration control for at least oxidizing the particulate matter collected by the exhaust particulate collecting section; and a control unit configured to adjust during the regeneration control at least one of a target filter temperature, a target exhaust air-fuel ratio, and a target regeneration control time in the regeneration control for oxidizing the particulate matter collected by the exhaust particulate collecting section in accordance with a decrease in the particulate matter collected by the exhaust particulate collecting section associated with the regeneration control, the control unit being configured to adjust the target exhaust air-fuel ratio to a leaner value during the regeneration control in accordance with the decrease in the particulate matter collected by the exhaust particulate collecting section.