Detector device for combustion state in internal combustion engine
August 28, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDetermining crankshaft acceleration in an internal combustion engine Apparatus for detecting misfire in internal combustion engines for vehicles Misfire detecting device for internal combustion engine Method for detecting misfires in gasoline internal combustion engine Single sensor misfire detection apparatus and method for an internal combustion engine System and method to compensate for torsional disturbances in measured crankshaft velocities for engine misfire detection Misfire detection method based on fluctuation in crankshaft rotation Misfire detecting apparatus for internal combustion engine with manufacturing error compensation Patent #: 5528929 InventorsAssigneeApplicationNo. 704368 filed on 08/28/1996US Classes:701/110, Speed, acceleration, deceleration73/116, MOTOR AND ENGINE TESTING73/117.3, With continuous operation123/406.24, Including means responsive to the instantaneous change in engine speed (e.g., roughness, unstable combustion, etc.)123/436Including means responsive to instantaneous change in engine speedExaminersPrimary: Dombroske, George M.Attorney, Agent or FirmForeign Patent References
International ClassG01M 015/00Foreign Application Priority Data1995-09-04 JPAbstractIt is intended to detect combustion state of an internal combustion engine over the entire range where positive torque is generated. Time required from a predetermined first crank angle to a second crank angle is measured by detecting a rotation angle of a ring gear or plate with engine speed detecting means 101. Then, a combustion state parameter is calculated from said required time by combustion state detecting means 102 with an established calculation method, and combustion state is determined by combustion state judging means 103. Engine speed correction means 104 determines and feeds back a correction value for the combustion state detecting value to correct the engine speed. At the moment, the correction quantity for correcting the required time is varied so that the normal combustion value of said combustion state parameter is at a predetermined value or less, or within a predetermined range. When the combustion state parameter reaches a value indicating misfire, update of the correction value is inhibited for a prescribed duration before and after it. | |
