Patent application number | Description | Published |
20080276689 | KNOCKING DETECTING DEVICE FOR AN INTERNAL COMBUSTION ENGINE - The present invention relates to a knocking detecting device for an internal combustion engine, for controlling a timing at which an ignition coil is actuated according to a knocking occurrence intensity, the knocking detecting device including the signal processing module for processing a signal attributable to knocking occurring in the operation of the internal combustion engine to determine a knocking occurrence intensity, in which the signal processing module includes: signal detecting means for detecting a signal attributable to knocking; frequency intensity calculating means for selecting a plurality of frequencies extracted from an output of the signal detecting means to calculate a frequency intensity; and knocking intensity determining means for finally determining that knocking occurs in a case where it is determined that at least two primary determination results of among a plurality of primary knocking determination results based on the outputs of the frequency intensity calculating means. | 11-13-2008 |
20090084353 | INTERNAL-COMBUSTION-ENGINE COMBUSTION CONDITION DETECTION APPARATUS - An internal-combustion-engine combustion condition detection apparatus that can accurately comprehend a combustion condition is obtained. The internal-combustion-engine combustion condition detection apparatus includes an ion-current detection device ( | 04-02-2009 |
20090108846 | COMBUSTION STATE DETECTION APPARATUS AND COMBUSTION STATE DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE - A combustion state detection apparatus for an internal combustion engine, includes convexity detection means ( | 04-30-2009 |
20090173315 | INTERNAL-COMBUSTION-ENGINE COMBUSTION CONDITION DETECTION APPARATUS AND COMBUSTION CONDITION DETECTION METHOD - An internal-combustion-engine combustion condition detection apparatus is provided with an ignition means that makes an ignition plug ignite a fuel; an ignition control means that controls the operation of the ignition means; an ion-current detection means that detects an ion current generated; an ion current detection range setting means that sets an ion-current detection range; a preignition detection means that detects preignition within a detection range to be set; a leakage current detection range setting means that sets a leakage-current detection range; and a leakage current determination means that determines whether or not a smolder exists, based on a current detected, within a detection range to be set, by the ion-current detection means. The ignition control means includes a non-combustion-stroke ignition control means; the leakage-current detection range set by the leakage current detection range setting means is set within the non-combustion stroke. | 07-09-2009 |
20100257921 | INTERNAL-COMBUSTION-ENGINE IGNITION DIAGNOSIS APPARATUS - There is provided an ignition diagnosis apparatus that detects ignition abnormality in a multi-point-ignition internal combustion engine. An ion detection device provided in at least one of a plurality of ignition devices detects an electric quantity based on ions produced in a combustion chamber due to combustion of an inflammable fuel-air mixture; an ion occurring timing detection device detects an ion occurring timing, based on the electric quantity detected in a predetermined detection period; an ignition abnormality determination device compares the detected ion occurring timing with a comparison timing set in such a way as to be delayed in terms of the rotation angle of a crankshaft of the internal combustion engine with respect to an ignition timing set for the ignition device provided with the ion detection device, and determines that ignition performed by the ignition device provided with the ion detection device is abnormal, in the case where the ion occurring timing is delayed in terms of the rotation angle of the crankshaft with respect to the comparison timing. | 10-14-2010 |
20100258081 | INTERNAL-COMBUSTION-ENGINE COMBUSTION STATE DETECTING APPARATUS - There is provided a combustion state detecting apparatus capable of detecting combustion-state abnormality in an internal combustion engine. A comparison timing is set to be advanced in terms of the rotation angle of the crankshaft of an internal combustion engine with respect to the ending timing of an electric quantity based on an ion that occurs when ignition is performed normally through a predetermined ignition signal among the plurality of ignition signals; in the case where, as a result of the comparison between the detected ending timing of an electric quantity based on an ion and the comparison timing, the ending timing is advanced in terms of the rotation angle of the crankshaft with respect to the comparison timing, it is determined that the combustion based on ignition through the predetermined ignition signal is abnormal. | 10-14-2010 |
Patent application number | Description | Published |
20080257018 | KNOCK DETECTION APPARATUS FOR INTERNAL COMBUSTION ENGINE - A knock detection apparatus for an internal combustion engine can accurately detect the occurrence of a knock without an influence of a noise component even if the noise component having the same frequency as a knock vibration superposes on an ionic current signal. The apparatus includes an ionic current detection section, a knock signal detection section for detecting a knock signal based on an ionic current, a crank angle sensor for detecting a crank angle corresponding to a rotational position of the engine, a window setting section for setting a noise detection window, a noise component detection section for detecting a noise component in the window, and a knock determination section for determining the occurrence of a knock based on a relation between the noise component and the knock signal. The window setting section sets the window after a predetermined crank angle corresponding to an end of a combustion stroke of the engine. | 10-23-2008 |
20080281504 | KNOCK CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A knock control apparatus for an internal combustion engine can avoid an incorrect knock determination thereby to prevent output power reduction and suppress knocks occurring in succession. A knock detection section outputs a knock detection signal based on an ionic current, and a threshold setting section sets a knock determination threshold. A knock determination section determines the occurrence of a knock based on the threshold and the knock detection signal. A required correction amount setting section sets a required correction amount for ignition timing based on a knock determination result, and a control parameter correction section corrects ignition timing based on the required correction amount. A noise determination section determines the occurrence of noise based on whether said knock detection signal or said control parameter correction amount is within a set level range, and a noise removal period setting section sets a noise removal period based on the noise determination result. | 11-13-2008 |
20100089361 | INTERNAL-COMBUSTION-ENGINE COMBUSTION CONDITION DETECTION APPARATUS AND COMBUSTION CONDITION DETECTION METHOD - An internal-combustion-engine combustion condition detection apparatus is provided with an ignition means that makes an ignition plug ignite a fuel; an ignition control means that controls the operation of the ignition means; an ion-current detection means that detects an ion current generated; an ion current detection range setting means that sets an ion-current detection range; a preignition detection means that detects preignition within a detection range to be set; a leakage current detection range setting means that sets a leakage-current detection range; and a leakage current determination means that determines whether or not a smolder exists, based on a current detected, within a detection range to be set, by the ion-current detection means. The ignition control means includes a non-combustion-stroke ignition control means; the leakage-current detection range set by the leakage current detection range setting means is set within the non-combustion stroke. | 04-15-2010 |