Support unit for supporting a heating conductor of an exhaust gas heater on a carrier structure
AssigneePurem GmbH
InventorHolger Brenner
Life of this patent
Estimating the term…
Abstract
A support unit for supporting a heating conductor of an exhaust gas heater on a carrier structure includes a supporting sleeve extending in the direction of a longitudinal axis and surrounding the longitudinal axis, a supporting pin having a sleeve connecting area extending in the supporting sleeve and an exhaust gas heater connecting area projecting beyond the supporting sleeve, wherein the supporting pin, at least in the area of its sleeve connecting area, and/or the supporting sleeve, on an inner surface surrounding the sleeve connecting area of the supporting pin, is coated with insulating material, and wherein the sleeve connecting area is held in the supporting sleeve by a force fit.
Claims14
A support unit for supporting a heating conductor of an exhaust gas heater on a carrier structure, the support unit comprising:
- a supporting sleeve extending in a direction of a longitudinal axis and surrounding the longitudinal axis;
- a supporting pin having a sleeve connecting area extending in said supporting sleeve and an exhaust gas heater connecting area projecting beyond said supporting sleeve;
- at least one of said supporting pin, at least in an area of said sleeve connecting area and said supporting sleeve, on an inner surface surrounding said sleeve connecting area of said supporting pin, being coated with an insulating material;
- and,
- said sleeve connecting area being held in the supporting sleeve by a force fit, wherein said force fit is provided by thermal treatment of at least one of said supporting sleeve and said supporting pin before insertion of said sleeve connecting area into said supporting sleeve, wherein at least one of said supporting sleeve is heated and said supporting pin is cooled before insertion of said sleeve connecting area into said supporting sleeve.
A method for making a support unit for supporting a heating conductor of an exhaust gas heater on a carrier structure, the support unit including a supporting sleeve and a supporting pin;
- the supporting sleeve extending in a direction of a longitudinal axis and surrounding the longitudinal axis;
- said supporting pin having a sleeve connecting area extending in the supporting sleeve and an exhaust gas heater connecting area projecting beyond the supporting sleeve;
- at least one of the supporting pin, at least in an area of the sleeve connecting area and the supporting sleeve, on an inner surface surrounding the sleeve connecting area of the supporting pin, being coated with an insulating material;
- and, the sleeve connecting area being held in the supporting sleeve by a force fit, the method comprising:
- at least one of heating said supporting sleeve and cooling said supporting pin before the insertion of the sleeve connecting area into the supporting sleeve for the force-fit connection of the supporting sleeve to the supporting pin.
An exhaust gas heater for an exhaust gas system of an internal combustion engine, the exhaust gas heater comprising:
- a carrier structure;
- at least one support unit;
- at least one heating conductor carried on said carrier structure via said at least one support unit;
- said at least one support unit including a supporting sleeve and a supporting pin;
- said supporting sleeve being fastened to said carrier structure by material bonding and extending in a direction of a longitudinal axis and surrounding the longitudinal axis;
- said supporting pin having a sleeve connecting area extending in said supporting sleeve and an exhaust gas heater connecting area projecting beyond said supporting sleeve and being fastened to said at least one heating conductor by material bonding;
- at least one of said supporting pin, at least in an area of said sleeve connecting area and said supporting sleeve, on an inner surface surrounding said sleeve connecting area of said supporting pin, being coated with an insulating material;
- and,
- said sleeve connecting area being held in the supporting sleeve by a force fit.
An exhaust gas system for an internal combustion engine, the exhaust gas system comprising:
- an exhaust gas heater having a carrier structure, at least one support unit, and at least one heating conductor carried on said carrier structure via said at least one support unit;
- said at least one support unit including a supporting sleeve and a supporting pin;
- said supporting sleeve being fastened to said carrier structure by material bonding and extending in a direction of a longitudinal axis and surrounding the longitudinal axis;
- said supporting pin having a sleeve connecting area extending in said supporting sleeve and an exhaust gas heater connecting area projecting beyond said supporting sleeve and being fastened to said at least one heating conductor by material bonding;
- at least one of said supporting pin, at least in an area of said sleeve connecting area and said supporting sleeve, on an inner surface surrounding said sleeve connecting area of said supporting pin, being coated with an insulating material;
- and,
- said sleeve connecting area being held in the supporting sleeve by a force fit.
Dependencies are inferred from the claim text.