Control device for burner air for diesel particulate filter

Abstract

Abstract PURPOSE:To make it possible to control the flow rate of secondary air with a high degree of accuracy, by providing, in an air supply passage for a burner, an air-flowmeter and a relief valve for discharging a part of air to the atmosphere. CONSTITUTION:A burner 20 for supplying hot blast to a filter 5 in an exhaust passage 3 at a predetermined temperature and a predetermined air-excess ratio receives secondary air from a secondary air pump 9 through a secondary air passage 21. An air-flowmeter 27 and an atmospheric temperature sensor 38 are disposed between the burner 20 and the secondary air pipe 9. The air-flowmeter 27 consists of a venturi 24, a sensor 26 for detecting a venturi vacuum and a sensor 25 for detecting a pressure at the venturi inlet side. With the outlets of these three sensors a relieve valve 23 is operated by means of a control section 28.

Inventors

• 👤 Satoshi Kume
• 👤 粂　智
• 👤 「よし」田　道保
• 👤 Michiyasu Yoshida
• 👤 Yoshihiro Konno
• 👤 紺野　義博
• 👤 Takeo Kume
• 👤 久米　建夫

Bibliographic Details