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Class Information
Number: 73/35.08
Name: Measuring and testing > Engine detonation (e.g., knock) > Specific type of detonation sensor > Ionization
Description: Subject matter wherein the sensing means comprises spaced electrodes between which electrical current passes in proportion to ionization of combustion gases in the engine.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8701629 Internal-combustion-engine combustion state detecting apparatus Apr. 22, 2014
8490468 Failure diagnosis system Jul. 23, 2013
8461844 Self charging ion sensing coil Jun. 11, 2013
8438906 Apparatus and method for the detection of knocking combustion May. 14, 2013
8324905 Automatic variable gain amplifier Dec. 4, 2012
8291747 Internal combustion engine combustion state detection apparatus Oct. 23, 2012
8069709 Ion-based triple sensor Dec. 6, 2011
7971571 Operation control method on the basis of ion current in internal combustion engine Jul. 5, 2011
7971476 Method and devices for the identification of various phases of an ionization current signal during the combustion in an internal combustion engine Jul. 5, 2011
7921704 Virtual flex fuel sensor for spark ignition engines using ionization signal Apr. 12, 2011
7882730 Internal-combustion-engine ignition diagnosis apparatus Feb. 8, 2011
7863903 Combustion state detection apparatus and combustion state detection method for internal combustion engine Jan. 4, 2011
7856308 Knock detection apparatus for internal combustion engine Dec. 21, 2010
7845937 Method and device for influencing combustion processes Dec. 7, 2010
7836864 Internal-combustion-engine combustion condition detection apparatus and combustion condition detection method Nov. 23, 2010
7673614 Internal-combustion-engine combustion condition detection apparatus and combustion condition detection method Mar. 9, 2010
7624627 Ion-based triple sensor Dec. 1, 2009
7624718 Engine control system, vehicle having the same, method for calculating combustion center of gravity, and method for controlling engine Dec. 1, 2009
7472687 System and method for pre-processing ionization signal to include enhanced knock information Jan. 6, 2009
7467040 Method of real time-estimation of indicators of the combustion state of an internal-combustion engine Dec. 16, 2008
7458250 Ion sensing arrangement for small gasoline engine Dec. 2, 2008
7448253 Combustion state determination method of internal combustion engine Nov. 11, 2008
7444232 Knock control apparatus for internal combustion engine Oct. 28, 2008
7373803 Driver circuit for an ion measurement device May. 20, 2008
7353803 Misfire detection apparatus for internal combustion engine based on piston speed Apr. 8, 2008
7290442 Method and system of estimating MBT timing using in-cylinder ionization signal Nov. 6, 2007
7267115 Ignition apparatus for an internal combustion engine Sep. 11, 2007
7204133 Method and apparatus for detecting combustion instability in continuous combustion systems Apr. 17, 2007
7197913 Low cost circuit for IC engine diagnostics using ionization current signal Apr. 3, 2007
7174251 Knocking detection apparatus and detecting method Feb. 6, 2007
7063079 Device for reducing the part count and package size of an in-cylinder ionization detection system by integrating the ionization detection circuit and ignition coil driver into a single package Jun. 20, 2006
7062373 Misfire detection apparatus of internal combustion engine Jun. 13, 2006
7055372 Method of detecting cylinder ID using in-cylinder ionization for spark detection following partial coil charging Jun. 6, 2006
6993960 Method and apparatus for detecting combustion instability in continuous combustion systems Feb. 7, 2006
6994073 Method and apparatus for detecting ionization signal in diesel and dual mode engines with plasma discharge system Feb. 7, 2006
6951201 Method for reducing pin count of an integrated coil with driver and ionization detection circuit by multiplexing ionization and coil charge current feedback signals Oct. 4, 2005
6943554 Ionic current detection apparatus for internal combustion engine Sep. 13, 2005
6931914 Combustion condition detection apparatus for an internal combustion engine Aug. 23, 2005
6922628 IC engine diagnostic system using the peak and integration ionization current signals Jul. 26, 2005
6912459 Control device for an internal combustion engine Jun. 28, 2005
6886547 Ignition system with multiplexed combustion signals May. 3, 2005
6865929 Combustion state detection and failure determination apparatus of an internal combustion engine Mar. 15, 2005
6848296 Misfire detection apparatus for internal combustion engine Feb. 1, 2005
6832136 Method and device for controlling a drive unit of a vehicle Dec. 14, 2004
6813933 Method and device for positioning measuring displays for measuring ion currents Nov. 9, 2004
6813932 Misfire detection device for internal combustion engine Nov. 9, 2004
6805099 Wavelet-based artificial neural net combustion sensing Oct. 19, 2004
6789409 Knock detection apparatus for internal combustion engine Sep. 14, 2004
6781384 Enhancing the stability of electrical discharges Aug. 24, 2004
6752004 Misfire detection apparatus for internal combustion engine Jun. 22, 2004

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