# US 7,744,014 B2 · Injection module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,744,014 B2 - Document ID: US7744014B2 - Status: Granted - Kind: B2 - Application number: 11/041,587 - Filed: 2005-01-24 - Published: 2005-07-07 - Granted: 2010-06-29 - Earliest claimed: 2002-07-25 - Assignees: Continental Automotive GmbH - Inventors: Jürgen Dick; Heinz Lixl; Willibald Schürz; Martin Simmet - Web page: https://patentgrep.com/patent/US7744014B2 ## CPC - F02M 61/167: {Means for compensating clearance or thermal expansion} - F02M 47/027: {Electrically actuated valves draining the chamber to release the closing pressure} - F02M 63/0026: {using piezoelectric or magnetostrictive actuators} - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF ## Abstract An injection module comprises a housing (1), inside of which an actuator element (2) and an injection valve are arranged. The actuator element (2) is designed for controlling the injection valve by a setting stroke. A compensating element (6) is provided that is connected to the actuator element (2) in order to compensate for the change in length of the housing (1) caused by thermal expansion. ## Claims ### Claim 1 An injection module with a housing comprising: an actuator element within the housing, wherein the actuator element changes its length when actuated according to an actuating stroke; an injection valve within the housing, wherein the actuator element controls the injection valve by means of the actuating stroke; a compensating element within the housing and arranged in series with the actuator element along an axial direction of the injection module, wherein a first end of the compensating element is connected to the actuator element and a second end of the compensating element is connected to the housing, wherein the compensating element compensates for changes in length of the housing as a result of thermal expansion; and a thermally conducting element disposed on the compensating element, wherein the thermally conducting element conducts thermal energy between the compensating element and the housing, and wherein the thermally conducting element allows slippage between the compensating element and the housing; wherein the second end of the compensating element is connected to the housing at a retaining point in such a way that the thermal expansion of the housing between the retaining point and the injection valve is essentially equivalent to the sum of the thermal expansion of actuator element and the thermal expansion of the compensating element. ### Claim 2 (depends on 1) The injection module as claimed in claim 1, wherein the thermally conducting element is in contact with the housing and with the compensating element. ### Claim 3 (depends on 1) The injection module as claimed in claim 1, wherein the thermally conducting element is embodied as a sleeve which is disposed around the compensating element. ### Claim 4 (depends on 3) The injection module as claimed in claim 3, wherein the sleeve has longitudinal slits, with the ridges formed by the longitudinal slits being curved. ### Claim 5 (depends on 3) The injection module as claimed in claim 3, wherein the sleeve is a metal sleeve, preferably made of a material exhibiting good thermal conductivity, said material being in particular copper, brass or silver. ### Claim 6 (depends on 3) The injection module as claimed in claim 3, wherein the sleeve is split down its entire length. ### Claim 7 (depends on 1) An injection module as claimed in claim 1, wherein the second end of the compensating element is connected to the housing at a retaining point via a clamping screw. ### Claim 8 An injection module with a housing comprising: an actuator element within the housing, wherein the actuator element changes its length when actuated according to an actuating stroke; an injection valve within the housing, wherein the actuator element controls the injection valve by means of the actuating stroke; a compensating element within the housing and arranged in series with the actuator element along an axial direction of the injection module, wherein a first end of the compensating element is connected to the actuator element and a second end of the compensating element is connected to the housing, wherein the compensating element compensates for changes in length of the housing as a result of thermal expansion; and a plurality of thermally conducting elements disposed on the compensating element such that the thermal conducting elements are disposed in end-to-end fashion, wherein the plurality of thermally conducting elements conduct thermal energy between the compensating element and the housing, and wherein the plurality of thermally conducting elements allow slippage between the compensating element and the housing, wherein the second end of the compensating element is connected to the housing at a retaining point in such a way that the thermal expansion of the housing between the retaining point and the injection valve is essentially equivalent to the sum of the thermal expansion of actuator element and the thermal expansion of the compensating element. ### Claim 9 (depends on 8) The injection module as claimed in claim 8, wherein the plurality of thermally conducting elements is in contact with the housing and with the compensating element. ### Claim 10 (depends on 8) The injection module as claimed in claim 8, wherein the plurality of thermally conducting elements is embodied as a plurality of sleeves which are each disposed around the compensating element. ### Claim 11 (depends on 10) The injection module as claimed in claim 10, wherein each sleeve of the plurality of sleeves has longitudinal slits, with the ridges formed by the longitudinal slits being curved. ### Claim 12 (depends on 10) The injection module as claimed in claim 10, wherein each sleeve of the plurality of sleeves is a metal sleeve, preferably made of a material exhibiting good thermal conductivity, said material being in particular copper, brass or silver. ### Claim 13 (depends on 10) The injection module as claimed in claim 10, wherein each sleeve of the plurality of sleeves is split down its entire length. ### Claim 14 (depends on 8) An injection module as claimed in claim 8, wherein the second end of the compensating element is connected to the housing at a retaining point via a clamping screw.