Internal combustion engine exhaust component and a method of making an internal combustion engine exhaust component
A rear box for an internal combustion engine exhaust includes a shell with a lining applied over the part of an inner surface of the shell which is susceptible to exhaust condensate contact. Generally, the lining is applied over approximately ⅓ to ½ of a surface area of the inner surface of the shell.
1 . An internal combustion engine exhaust component comprising:
a shell having an outer surface and an inner surface and defining a chamber, wherein the inner surface of the shell has a first part susceptible to exhaust condensate contact and a second part not susceptible to the exhaust condensate contact; and
a lining applied over only the first part of the inner surface of the shell to protect the first part from the exhaust condensate contact.
2 . The internal combustion engine exhaust component according to claim 1 wherein the lining covers approximately one-third to one-half of a surface area of the inner surface of the shell.
3 . An internal combustion engine exhaust component comprising:
a shell having an outer surface and an inner surface and defining a chamber; and
a lining applied over approximately one-third to one-half of a surface area of the inner surface of the shell.
4 . The internal combustion engine exhaust component according to claim 1 wherein the lining is applied to the first part of the inner surface of the shell by spot welding.
5 . A method of making an internal combustion engine exhaust component comprising the steps of:
providing a shell having an outer surface and an inner surface and defining a chamber;
determining a part of the inner surface of the shell which will be contacted by condensates when in operation; and
applying a lining to the part of the inner surface of the shell which will be contacted by the condensates.
6 . The method according to claim 5 including the steps of providing a substantially flat sheet of material, applying the lining to the substantially flat sheet of material and then forming the substantially flat sheet of material into a shape of the shell.
7 . The method according to claim 5 wherein step of applying the lining includes spot welding.
8 . The internal combustion engine exhaust component according to claim 1 wherein the shell has a shell thickness and the lining has a lining thickness, and the shell thickness is thicker than the lining thickness.
9 . The internal combustion engine exhaust component according to claim 3 wherein the shell has a shell thickness and the lining has a lining thickness, and the shell thickness is thicker than the lining thickness.
10 . The internal combustion engine exhaust component according to claim 3 wherein the lining is applied to the inner surface of the shell by spot welding.
11 . The method according to claim 5 including the step of forming the shell to have a shell thickness that is thicker than a lining thickness of the lining.