# US 2014/0360254 A1 · Camshaft position pulse-generating wheel and method and device for ascertaining a camshaft position > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360254 A1 - Document ID: US20140360254A1 - Status: Published application - Kind: A1 - Application number: 14/299,335 - Filed: 2014-06-09 - Published: 2014-12-11 - Earliest claimed: 2013-06-11 - Assignees: Robert Bosch GmbH - Inventors: Carsten Deringer; Paul Stuckert; Ralf Drescher; Ulrich-Michael Nefzer - Web page: https://patentgrep.com/patent/US20140360254A1 ## CPC - G01D 5/2455: {with incremental and absolute tracks on the same encoder} - H02K 11/215: Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A camshaft position pulse-generating wheel having a plurality of teeth on its circumference at irregular angular distances and one tooth edge in each case, at least at 0°, 90°, 120°, 180°, 240° and 270° of its circumference, and a device for ascertaining a camshaft position. In this position, the camshaft position pulse-generating wheel is connected, in a torsionally fixed manner, to a camshaft of a four-stroke internal combustion engine having at least one cylinder and a camshaft position sensor to detect a position of a tooth edge of the camshaft position pulse-generating wheel. For determining the camshaft position, per revolution of the camshaft and per cylinder of the internal combustion engine, either exclusively a camshaft position is assigned to a position of a negative tooth edge of the camshaft position pulse-generating wheel or to a position of a positive or a negative tooth edge of the camshaft position pulse-generating wheel. ## Claims ### Claim 1 A camshaft position pulse-generating wheel, comprising: a camshaft position pulse-generating wheel arrangement having a plurality of teeth on a circumference at irregular angular distances, wherein it has a tooth edge in each case, at least at 0°, 90°, 120°, 180°, 240° and 270° of the circumference. ### Claim 2 (depends on 1) The camshaft position pulse-generating wheel of claim 1, wherein there is a tooth edge in each case at 60° and at 300° of its circumference. ### Claim 3 (depends on 2) The camshaft position pulse-generating wheel of claim 2, wherein there is a tooth edge in each case at 45°, 135°, 225° and 315° of its circumference. ### Claim 4 A device for ascertaining a position of a camshaft, comprising: a camshaft position pulse-generating wheel having a plurality of teeth on a circumference at irregular angular distances, wherein it has a tooth edge in each case, at least at 0°, 90°, 120°, 180°, 240° and 270° of the circumference, which is connected to a camshaft of a four-stroke internal combustion engine having at least one cylinder in a torsionally fixed manner; and a camshaft position sensor to detect a position of a tooth edge of the camshaft position pulse-generating wheel. ### Claim 5 (depends on 4) The device of claim 4, wherein the camshaft position sensor is configured to detect exclusively a position of a negative tooth edge of the camshaft position pulse-generating wheel. ### Claim 6 (depends on 4) The device of claim 4, wherein the camshaft position sensor is configured to detect a position of a positive and a negative tooth edge of the camshaft position pulse-generating wheel. ### Claim 7 A method for determining a position of a camshaft using a device or ascertaining a position of a camshaft, the method comprising: assigning, per revolution of the camshaft and per cylinder of the internal combustion engine, a camshaft position to a position of a negative tooth edge of a camshaft position pulse-generating wheel; wherein the device for ascertaining a position of a camshaft, includes: the camshaft position pulse-generating wheel having a plurality of teeth on a circumference at irregular angular distances, wherein it has a tooth edge in each case, at least at 0°, 90°, 120°, 180°, 240° and 270° of the circumference, which is connected to a camshaft of a four-stroke internal combustion engine having at least one cylinder in a torsionally fixed manner; and a camshaft position sensor to detect a position of a tooth edge of the camshaft position pulse-generating wheel. ### Claim 8 (depends on 7) The method of claim 7, wherein a camshaft phase is assigned in each case to further negative tooth edges of the camshaft position pulse-generating wheel. ### Claim 9 (depends on 7) The method of claim 7, wherein the camshaft position sensor is configured to detect a position of a positive and a negative tooth edge of the camshaft position pulse-generating wheel. ### Claim 10 (depends on 9) The method of claim 9, wherein a camshaft phase is assigned to at least one distance between a positive and a negative tooth edge of the camshaft position pulse-generating wheel. ### Claim 11 A computer readable medium having a computer program, which is executable by a processor, comprising: a program code arrangement having program code for determining a position of a camshaft using a device or ascertaining a position of a camshaft, by performing the following: assigning, per revolution of the camshaft and per cylinder of the internal combustion engine, a camshaft position to a position of a negative tooth edge of a camshaft position pulse-generating wheel; wherein the device for ascertaining a position of a camshaft, includes: the camshaft position pulse-generating wheel having a plurality of teeth on a circumference at irregular angular distances, wherein it has a tooth edge in each case, at least at 0°, 90°, 120°, 180°, 240° and 270° of the circumference, which is connected to a camshaft of a four-stroke internal combustion engine having at least one cylinder in a torsionally fixed manner; and a camshaft position sensor to detect a position of a tooth edge of the camshaft position pulse-generating wheel. ### Claim 12 (depends on 11) The computer readable medium of claim 11, wherein there is a tooth edge in each case at 60° and at 300° of its circumference. ### Claim 13 (depends on 12) The computer readable medium of claim 12, wherein there is a tooth edge in each case at 45°, 135°, 225° and 315° of its circumference.