Back to results
US 11,781,459 B2Granted
Heating unit for an exhaust-gas system of an internal combustion engine
AssigneePurem GmbH
InventorGerd Gaiser
Life of this patent
Estimating the term…
Abstract
A heating unit for an exhaust-gas system of an internal combustion engine includes a heating-unit housing for conducting an exhaust-gas in a main flow direction. A plurality of heating elements are arranged in the heating-unit housing and are shaped in a meandering manner. Each heating element has a plurality of plate-like heating sections which follow one another in a heating-element longitudinal direction. The heating sections of each heating element are connected to one another via respective connecting sections. Each heating element has two connection regions which are arranged at a distance from one another. In each connection region, the heating elements are electrically conductively connected to a connection region of a further heating element.
Claims22
A heating unit for an exhaust-gas system of an internal combustion engine, the heating unit comprising:
- a heating-unit housing for conducting a flow of exhaust gas in an exhaust-gas main flow direction (A);
- a plurality of heating elements arranged in said heating-unit housing;
- each of said heating elements being shaped in a meandering manner and having a plurality of plate-like heating sections following one another in a heating-element longitudinal direction (H);
- said heating sections of each of said heating elements being connected one to another via respective connecting sections;
- each of said heating elements defining two connection regions arranged at a distance from one another in said heating-element longitudinal direction (H) for electrically conductively connecting each one of said heating elements to at least one of the following:
- i) a connection region of a further heating element;
- and,
- ii) to a voltage source;
- for each of said heating elements, a heating-conductor length between the connection regions thereof is greater than an extent length of the heating element between the connection regions thereof in said heating-element longitudinal direction (H);
- and,
- at least two of said heating elements having the same heating-conductor length;
- wherein, for at least one heating element of said at least two heating elements having the same heating-conductor length, a transverse dimension (Q) transverse to said exhaust-gas main flow direction (A) and transverse to said heating-element longitudinal direction (H) varies in the direction of said heating-element longitudinal direction (H).
9 more elements
An exhaust-gas system for an internal combustion engine, the exhaust-gas system comprising:
- an exhaust-gas treatment unit including at least one of a catalytic converter and a particle filter;
- and,
- a heating unit arranged upstream of an exhaust-gas treatment unit;
- the heating unit including:
- a heating-unit housing for conducting a flow of exhaust gas in an exhaust-gas main flow direction (A);
- a plurality of heating elements arranged in said heating-unit housing;
- each of said heating elements being shaped in a meandering manner and having a plurality of plate-like heating sections following one another in a heating-element longitudinal direction (H);
- said heating sections of each of said heating elements being connected one to another via respective connecting sections;
- each of said heating elements defining two connection regions arranged at a distance from one another in said heating-element longitudinal direction (H) for electrically conductively connecting each one of said heating elements to at least one of the following:
- i) a connection region of a further heating element;
- and,
- ii) to a voltage source;
- for each of said heating elements, a heating-conductor length between the connection regions thereof is greater than an extent length of the heating element between the connection regions thereof in said heating-element longitudinal direction (H);
- and,
- at least two of said heating elements having the same heating-conductor length;
- wherein, for at least one heating element of said at least two heating elements having the same heating-conductor length, a transverse dimension (Q) transverse to said exhaust-gas main flow direction (A) and transverse to said heating-element longitudinal direction (H) varies in the direction of said heating-element longitudinal direction (H).
13 more elements
A heating unit for an exhaust-gas system of an internal combustion engine, the heating unit comprising:
- a heating-unit housing for conducting a flow of exhaust gas in an exhaust-gas main flow direction (A);
- a plurality of heating elements arranged in said heating-unit housing;
- each of said heating elements being shaped in a meandering manner and having a plurality of plate-like heating sections following one another in a heating-element longitudinal direction (H);
- said heating sections of each of said heating elements being connected one to another via respective connecting sections;
- each of said heating elements defining two connection regions arranged at a distance from one another in said heating-element longitudinal direction (H) for electrically conductively connecting each one of said heating elements to at least one of the following:
- i) a connection region of a further heating element;
- and,
- ii) to a voltage source;
- for each of said heating elements, a heating-conductor length between the connection regions thereof is greater than an extent length of the heating element between the connection regions thereof in said heating-element longitudinal direction (H);
- at least two of said heating elements having the same heating-conductor length;
- contact elements, said heating elements being electrically conductively connected in the connection regions corresponding thereto to said contact elements, at least two of said heating elements being electrically conductively connected in one of the connection regions corresponding thereto to one of said contact elements and being electrically conductively connected in the other connection region corresponding thereto to another one of said contact elements;
- and
- wherein:
- a first group (G1) has at least two of said heating elements electrically conductively connected in one connection region thereof to a first one of said contact elements and are electrically conductively connected in the other connection region thereof to a second one of said contact elements;
- and,
- a second group (G2) has at least two of further ones of said heating elements electrically conductively connected in one connection region thereof to a third one of said contact elements and are electrically conductively connected in the other connection region thereof to the second one of said contact elements.
13 more elements
An exhaust-gas system for an internal combustion engine, the exhaust-gas system comprising:
- an exhaust-gas treatment unit including at least one of a catalytic converter and a particle filter;
- and,
- a heating unit arranged upstream of an exhaust-gas treatment unit;
- the heating unit including:
- a heating-unit housing for conducting a flow of exhaust gas in an exhaust-gas main flow direction (A);
- a plurality of heating elements arranged in said heating-unit housing;
- each of said heating elements being shaped in a meandering manner and having a plurality of plate-like heating sections following one another in a heating-element longitudinal direction (H);
- said heating sections of each of said heating elements being connected one to another via respective connecting sections;
- each of said heating elements defining two connection regions arranged at a distance from one another in said heating-element longitudinal direction (H) for electrically conductively connecting each one of said heating elements to at least one of the following:
- i) a connection region of a further heating element;
- and,
- ii) to a voltage source;
- for each of said heating elements, a heating-conductor length between the connection regions thereof is greater than an extent length of the heating element between the connection regions thereof in said heating-element longitudinal direction (H);
- at least two of said heating elements having the same heating-conductor length;
- contact elements, said heating elements being electrically conductively connected in the connection regions corresponding thereto to said contact elements, at least two of said heating elements being electrically conductively connected in one of the connection regions corresponding thereto to one of said contact elements and being electrically conductively connected in the other connection region corresponding thereto to another one of said contact elements;
- and
- wherein:
- a first group (G1) has at least two of said heating elements electrically conductively connected in one connection region thereof to a first one of said contact elements and are electrically conductively connected in the other connection region thereof to a second one of said contact elements;
- and,
- a second group (G2) has at least two of further ones of said heating elements electrically conductively connected in one connection region thereof to a third one of said contact elements and are electrically conductively connected in the other connection region thereof to the second one of said contact elements.
17 more elements
Dependencies are inferred from the claim text.