The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 1997
Filed:
Jan. 04, 1995
Mercedes-Benz AG, Stuttgart, DE;
Abstract
In a method and apparatus for reducing hydrocarbon emissions from an internal combustion engine during its cold-starting phase an adsorber, which adsorbs hydrocarbons below a desorption temperature and desorbs them above the desorption temperature, is arranged in a bypass conduit to the exhaust conduit and the exhaust gas is passed through the bypass conduit and the adsorber below the desorption temperature of the adsorber, and the bypass conduit is closed when a catalytic converter arranged close the engine in the exhaust conduit upstream of the bypass conduit reaches operating temperature and remains closed at least until a catalytic converter arranged downstream of the adsorber has reached operating temperature.