An inline reductant filter assembly includes a filter housing, a filter media, and one or more valves. The filter housing is fluidly coupled to an upstream portion of a reductant line and a downstream portion of the reductant line. The filter media is positioned in the filter housing. The one or more valves are selectively movable from a first position to a second position. In the first position, the one or more valves permit fluid to flow along a first fluid flow path from the upstream portion of the reductant line, through the filter media, to the downstream portion of the reductant line. In the second position, the one or more valves prevent fluid from flowing along the first fluid flow path through the filter media.

An exhaust tailpipe/emissions filter employs a reusable/replaceable insert and is configured to slide into and/or onto the exhaust tailpipe of an automobile to reduce air pollution.

A vehicle diagnostic device for diagnosing a pressure sensor, which is used in a vehicle including: an engine mounted on an exhaust pipe with a filter for collecting particulate matter; a pressure piping branching from an upstream side of the filter of the exhaust pipe and bypassing the filter and connecting to a downstream side of the filter; and a pressure sensor mounted on the pressure piping and detecting a pressure of air in the pressure piping, wherein the execution of the diagnosis of the vehicle using the pressure sensor is prohibited, and in a case where freezing of water in the pressure piping is estimated, the execution of the diagnosis of the vehicle using the pressure sensor is permitted when the integrated value of the time traveled at a low speed exceeds the time determination value after the warm-up of the exhaust pipe is completed.

An exhaust purification apparatus includes a particulate filter, first and second exhaust passages. The particulate filter removes particulate matter. The first and second exhaust passages are coupled in parallel and coupled to an exhaust passage. The first exhaust passage communicates with a tail pipe via a secondary filter in an initial state of the particulate filter. After a start of use of the particulate filter, communication of the first exhaust passage with the tail pipe is blocked when the secondary filter is clogged with the particulate matter. The second exhaust passage is closed in the initial state. After the start, the second exhaust passage communicates with the tail pipe when the secondary filter is clogged with the particulate matter to cause an increase in pressure loss of the secondary filter and an increase in an exhaust pressure, and thus discharge of the liquid and/or evaporation of the liquid occurs.

A vehicle diagnostic device for diagnosing a pressure sensor, which is used in a vehicle including: an engine mounted on an exhaust pipe with a filter for collecting particulate matter; a pressure piping branching from an upstream side of the filter of the exhaust pipe and bypassing the filter and connecting to a downstream side of the filter; and a pressure sensor mounted on the pressure piping and detecting a pressure of air in the pressure piping, wherein the execution of the diagnosis of the vehicle using the pressure sensor is prohibited, and in a case where freezing of water in the pressure piping is estimated, the execution of the diagnosis of the vehicle using the pressure sensor is permitted when the integrated value of the time traveled at a low speed exceeds the time determination value after the warm-up of the exhaust pipe is completed.

An exhaust purification apparatus includes a particulate filter, first and second exhaust passages. The particulate filter removes particulate matter. The first and second exhaust passages are coupled in parallel and coupled to an exhaust passage. The first exhaust passage communicates with a tail pipe via a secondary filter in an initial state of the particulate filter. After a start of use of the particulate filter, communication of the first exhaust passage with the tail pipe is blocked when the secondary filter is clogged with the particulate matter. The second exhaust passage is closed in the initial state. After the start, the second exhaust passage communicates with the tail pipe when the secondary filter is clogged with the particulate matter to cause an increase in pressure loss of the secondary filter and an increase in an exhaust pressure, and thus discharge of the liquid and/or evaporation of the liquid occurs.