A pump for a reductant insertion assembly, comprises a housing configured to receive a reductant. A pumping element is disposed within the housing. The pumping element configured to pressurize the reductant and communicate the pressurized reductant out of the housing. The housing and/or the pumping element comprises aluminum, and the pump further comprises a corrosion resistant layer disposed on at least a portion of a surface of the housing and/or the pumping element that is configured to contact the reductant. The corrosion resistant layer comprising a fluoropolymer.

The diffusing member of the present invention is disposed in an exhaust pipe to partially block exhaust gas flowing in from upstream of the exhaust pipe, the diffusing member including a ceramic member and a metal member, wherein the ceramic member surrounds the metal member in such a manner that the metal member is partially exposed, and the volume of the ceramic member constituting the diffusing member is larger than the volume of the metal member constituting the diffusing member.

Provided is an exhaust system for an engine in which a fastening force of a fastener hardly decreases. An exhaust system for an engine includes: an exhaust passage component of ferrous metal; and a fastener that fastens the exhaust passage component to other parts, the exhaust passage component including a pressure receiving surface that receives a fastening force of the fastener. The oxide film of triiron tetraoxide is formed on the pressure receiving surface of the exhaust passage component. It is preferable that the oxide film of triiron tetraoxide be also formed on an outer surface other than the pressure receiving surface of the exhaust passage component. It is preferable that the oxide film of triiron tetraoxide be also formed on an inner surface of the exhaust passage component.

A process for the manufacture of a coated combustion component. The process includes spraying one or more liquid or powdered precursors into a high temperature thermal jet directed to a surface of a combustion component and forming a surface coating derived from the precursors to provide the coated combustion component. The surface coating may comprise a phosphate glass or a silicate glass. The surface coating may have a coefficient of thermal expansion from 3 to 26 ppm/K. A coefficient of thermal expansion of the combustion component may be greater than or equal to the coefficient of thermal expansion of the surface coating. The spraying may comprise solution spraying, powder thermal spraying, suspension thermal spraying, or a combination thereof.

A sensor including a sensor element, a metallic shell, a terminal fitting, a cylindrical case, lead wires, a connector portion, and a cylindrical heat shield tube. The heat shield tube includes a first tube and a second tube. The second tube is disposed on a distal end side of the first tube and covers an outer surface of the rear end side of the case, while providing an overlapping portion that overlaps the first tube. A rear end side of the first tube is adjacent to the connector portion. A total length T of the heat shield tube and a length S of the overlapping portion satisfy T/10S T/5. Further, a length L1 of the first tube and a length L2 of the second tube satisfy T/2L2<L1.

An exhaust component for a motor vehicle with improved corrosion resistance, including an internal volume, an inlet for receiving exhaust gas, and an outlet for expelling exhaust gas. The exhaust component includes at least one wall that is made of a diffusion surface alloyed metal sheet. The diffusion surface alloyed metal sheet comprises a secondary metal that is formed to a primary metal substrate by diffusion. The primary metal substrate of the diffusion surface alloyed metal sheet is a stainless steel containing at least 10 percent chromium. The secondary metal of the diffusion surface alloyed metal sheet is a metal alloy containing 20 to 35 percent chromium. As a result, the secondary metal of the diffusion surface alloyed metal sheet provides improved corrosion resistance to salt spray and urea.

In a heat exchanger installed on an intake path or exhaust path of an internal combustion engine and configured to cool gas by transferring heat between the gas containing exhaust and refrigerant, a water-repellent portion is formed at part of a portion that contacts the gas in a gas path through which the gas flows, and a hydrophilic portion is formed at another part of the portion. The water-repellent portion is a portion provided with water-repellent treatment. The hydrophilic portion is a portion provided with hydrophilic treatment. The hydrophilic portion is formed at a part having a temperature lower than the temperature of the part at which the water-repellent portion is formed while the heat exchanger is actuated.

A stainless steel that includes chromium and other alloying element as a plurality of alloying elements including: a base material layer including chromium of a specified chromium content necessary for forming a passive film or more; and a superficial layer including chromium at a lower chromium content than the chromium content contained in the base material layer, and the superficial layer including the other alloying elements at a same content of the other alloying element as the content of the other alloying element contained in the base material layer.

Methods and systems are provided for removing moisture from an engine exhaust system. In one example, a method includes, during a vehicle key-off condition, in response to a higher than threshold exhaust moisture level and a lower than threshold engine run time during an immediately prior drive cycle, operating an electric air compressor to remove the moisture accumulated in the exhaust manifold.

A system and a method for reducing band clamp failure on a multi-piece canister having an at least one first section coupled to an at least one second section by a band clamp, the system and method comprising a band clamp cover, wherein the band clamp cover comprises a cover first section and a cover second section, the cover first section is coupled to the cover second section at a first end by a hinge, the cover first section is coupled to the cover second section at a second end by removable fastener, the band clamp cover having a shape of the multi-piece cannister, wherein the band clamp cover has a channel that encompasses the band clamp.