Exhaust gas flow regulator

Abstract

The invention relates to an exhaust gas flow regulator installed in an exhaust pipeline and to an exhaust pipeline with such an regulator installed therein. The invention also relates to the manufacture and use of the exhaust gas flow regulator and the exhaust pipeline. The exhaust gas flow regulator (2, 12, 22) according to the invention comprises catalytic corrugated metal plates (2f) with the corrugation direction of their folds being in an angle towards the average flow direction of the exhaust gas (G) for regulating the exhaust gas flow at least in the lateral direction.

Description

TECHNICAL BACKGROUND[0001]The invention relates to an exhaust gas flow regulator installed in an exhaust pipeline and to an exhaust pipeline with such a regulator installed therein. The invention also relates to the manufacture and use of the exhaust gas flow regulator and the exhaust pipeline having said regulator.[0002]A frequent problem in the exhaust gas treatment is that the exhaust gas flow is uneven in the exhaust piping. This causes problems in both the exhaust gas purification and the measurement of exhaust gas properties, and through this in the motor adjustment. Consequently, the modelling of the equipment operation also becomes difficult. Attempts have been made to resolve the problem by constructing separate equalizing equipment, which can have been connected in front of the catalyst, for example. Separate devices additionally cause increased counter pressure in the piping, which for its part reduces the motor power. This has proportionately special importance particula...

AI Technical Summary

Benefits of technology

[0007]It is now possible with same pressure drop to have better purification results and with smaller pressure drop it now possible to have equal purification results compared to separate exhaust pipeline and catalyst. The exhaust manifold flow regulator according to the invention also provides the advantage that the catalyst can be located as close as possible to the motor. In this case its catalytic startup / ignition is extremely quick.

[0016]According to one embodiment of the invention, the exhaust pipeline has a mixing chamber, whose casing is at least a part of the exhaust pipeline casing. The manufacture of such a mixing chamber is preferable as it can be manufactured in connection with the exhaust pipeline manufacture. The mixing chamber can preferably be located between the inlet channels, which allows partly mixing together the exhaust gas flows coming from different inlet tubes / channels. This arrangement enables a reliable use of a lambda sensor, for example, for the adjustment of combustion. In addition, the mixing chamber makes the equalization of the exhaust gas flow generally more efficient.

Problems solved by technology

A frequent problem in the exhaust gas treatment is that the exhaust gas flow is uneven in the exhaust piping.

This causes problems in both the exhaust gas purification and the measurement of exhaust gas properties, and through this in the motor adjustment.

Consequently, the modelling of the equipment operation also becomes difficult.

Separate devices additionally cause increased counter pressure in the piping, which for its part reduces the motor power.

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