摘要:
A gas sensor control apparatus is provided which controls an operation of a gas sensor made up of a solid electrolyte body and a pair of electrodes to output a signal indicating the concentration of a given gas component contained in gas. The gas sensor control apparatus includes a constant current circuit that is connected electrically to one of the electrodes of the gas sensor and supplies a constant current thereto and a controller. The controller supplies a constant current to the gas sensor so that it flows from one of the electrodes to the other in a selected direction, thereby changing a response time the gas sensor takes to react to a change in concentration of the gas component. This results in an increased accuracy, for example, in controlling an air-fuel ratio of a mixture to an internal combustion engine in an engine control system.
摘要:
A control device is for an in-cylinder injection engine that makes fuel have high pressure through a high pressure pump to supply fuel to an injector and then injects fuel directly into a cylinder from the injector. The control device includes a fuel pressure detecting device for detecting pressure of fuel supplied to the injector, a target fuel pressure setting device for setting a target fuel pressure according to an engine operating state, a fuel pressure control device for feedback-controlling a fuel discharge amount from the pump such that fuel pressure detected by the detecting device accords with the target fuel pressure, a stop predicting device for determining whether the engine is about to stop, and a target fuel pressure gradual change device for decreasing the target fuel pressure gradually to a final target fuel pressure lower than normal, when it is determined that the engine is about to stop.
摘要:
A storage device incorporating an electrically erasable read only memory (EEPROM) or other data storage device having a limited number of total times of rewriting, has its useful like extended by the method of storing a pointer corresponding to the capacity of the memory, which pointer identifies a start position in the data storage device at which rewriting is to occur, and incrementing the pointer sequentially with each writing of the data storage device. The method and associated apparatus may be used to maintain a record of on-time of electronic apparatus, and/or to maintain data for correcting the white balance of a video camera under various light conditions.
摘要:
A hexagonal-cell honeycomb catalyzer is for purifying an exhaust gas. The catalyzer comprising a support that has a plurality of cells and a purification layer that has an HC absorption layer and a three-way catalyst layer. The HC absorption layer is formed on the honeycomb-formed surface of each wall of the support. The three-way catalyst layer is formed on the surface of the HC absorption layer. Provided that the HC absorption layer has a thickness a1 and the three-way catalyst layer has a thickness b1 at a thin portion of the purification layer of which thickness is minimum and the HC absorption layer has a thickness a2 and the three-way catalyst layer has a thickness b2 at a thick portion of the purification layer of which thickness is maximum, a ratio of a1/b1 and a ratio of a2/b2 are both within a range of 1/20 to 5/1.
摘要:
A double-deck video tape recorder has two tape cassette slots defined in a front panel thereof for inserting and ejecting respective magnetic tape cassettes therethrough. The double-deck video tape recorder also has a pair of drive mechanisms disposed in a housing for recording information on and reproducing information from the magnetic tape cassettes inserted in the respective drive mechanisms through the tape cassette slots. When an edit direction key is pressed, a control system places one of the drive mechanisms in a playback mode and another of the drive mechanisms in a recording mode. When a start/pause key is pressed, the control system starts to operate the one of the drive mechanisms to reproduce recorded information from the magnetic tape cassette inserted therein and also to operate the other drive mechanism to record the reproduced information in the magnetic tape cassette inserted therein.
摘要:
According to the present invention, in an image enhancer, an output of an outline extracting circuit is transmitted through a band limiting filter for suppressing bands other than an objective frequency band to be enhanced and, thereafter, it is supplied to a noise slicing circuit for eliminating micro amplitude noises. The noises near the cut-off frequency of the filter can be more effectively suppressed and the deterioration of the waveform characteristic of the outline enhancement signal due to the filter can be also improved.
摘要:
An internal combustion engine has an exhaust passage provided with a catalyst to purify exhaust gas. A control system for the internal combustion engine performs a quick-warming control to accelerate warming up of the catalyst when a predetermined condition is satisfied after the internal combustion engine begins cold startup. The control system further performs an advance control to advance an ignition timing further than an idling-ignition timing at the time of an idling operation in a period between beginning of the cold startup of the internal combustion engine and a time point where the quick-warming control is started.
摘要:
When an engine driving condition has been changed from an idling condition to a vehicle running condition, a controller measures an idling period. When the idling period is longer than a determination time period immediately after the vehicle is started, a penetrating-force-decrease control is performed. Therefore, even when a piston temperature is relatively low and particulate matters are easily generated, it can be restricted that fuel adheres to the piston top-surface by performing the penetrating-force-decrease control. Further, in the penetrating-force-decrease control, since the fuel is injected at optimum injection timing, it can be avoided that emission and fuel economy are deteriorated.
摘要:
When an engine driving condition has been changed from an idling condition to a vehicle running condition, a controller measures an idling period. When the idling period is longer than a determination time period immediately after the vehicle is started, a penetrating-force-decrease control is performed. Therefore, even when a piston temperature is relatively low and particulate matters are easily generated, it can be restricted that fuel adheres to the piston top-surface by performing the penetrating-force-decrease control. Further, in the penetrating-force-decrease control, since the fuel is injected at optimum injection timing, it can be avoided that emission and fuel economy are deteriorated.
摘要:
A video signal recording and/or reproducing apparatus includes a copy guard processing detecting current which can correctly judge whether or not a copy guard is applied to an input video signal and prevents copy guard processing from being applied to a video signal to which a copy guard is not applied. The copy guard processing detecting apparatus includes a first circuit for receiving an input video signal which includes a plurality of false synchronizing signals for prevention of duplication inserted in a vertical blanking interval thereof and for counting the number of the false synchronizing signals, a second circuit for counting the number of synchronizing signals in an image interval of the input video signal except the vertical blanking interval, a discriminating circuit for discriminating whether or not copy guard processing is applied to the input video signal from the count values of the first and second circuits, and a recording system for receiving and recording the input video signal based on the results of the copy guard discriminating operation.