公开(公告)号：JPH03167699A

公开(公告)日：1991-07-19

申请号：JP27888390

申请日：1990-10-16

Applicant: MARELLI AUTRONICA

Inventor： FURANKO MAROBERUTEI ,  JINO PORITO ,  FURANKO SARERUNO

IPC: G08C13/00 ,  F02B1/04 ,  G01R19/22 ,  H03G1/04

Abstract: PURPOSE: To sample-process input signals in the same phase regardless of the polarity by sample-processing the input signals during the only phase period of a clock for stipulating the operation of a switching capacitor circuit. CONSTITUTION: An FF circuit 12 is operated by phase signals -ψ2 and outputs signals Q and Q and the switches Sa-Sd of multiplexers MA and MB are controlled by the signals Q and Q. During an integration phase, the input signals Vin are sample-processed during the ON period of the phase signals ψ2 in a rectification and integration circuit 2-3. When the signals Vin are the positive polarity, the multiplexers MA and MB match the phase ψA with the phase ψ1 and the phase ψB with the phase ψ2 . Thus, the signals Vin are integration- processed by an integration capacitor C3 in a non-inversion mode in the period of the phase ψ1 . On the other hand, when the signals Vin are the negative polarity, the multiplexers MA and MB match the phase ψA with the ψ2 and phase ψB with the ψ1 . In this case, the capacitor C, integrationprocesses the signals in an inversion mode.

公开(公告)号：JPH02257032A

公开(公告)日：1990-10-17

申请号：JP16649489

申请日：1989-06-28

Applicant: MARELLI AUTRONICA

Inventor： JINO PORITO ,  FURANKO MAROBERUCHI

IPC: F02B1/04 ,  F02D41/22 ,  G01L23/22 ,  G01M15/00

Abstract: PURPOSE: To obtain an excellent signal/noise ratio by providing a line which recognizes the first two peaks of pinking signals at the time of detecting the pinking of an internal combustion engine which occurs when an explosive mixture is exploded by automatic ignition and two monitoring lines which decide the level of noise. CONSTITUTION: A method and device for detecting pinking are based on the monitoring of a signal from a vibration-type acceleration sensor S in two bands, for example, 8kHz and 13.8kHz in which peaks indicating the presence of pinking appear. Then the signal component is compared with a noise component, but the executing method of this comparison varies depending upon whether or not the signal intensity detected in response to the second peak (13.8kHz) reaches a prescribed minimum level proportional to the signal intensity detected in response to the first peak (8kHz). When a noise signal component exceeds a noise component multiplied by a prescribed magnification, the occurrence of the pinking is indicated by adding an offset voltage.

公开(公告)号：JPH03152471A

公开(公告)日：1991-06-28

申请号：JP26618290

申请日：1990-10-02

Applicant: MARELLI AUTRONICA

Inventor： FURANKO MAROBERUTEI ,  JINO PORITO ,  FURANKO SARERUNO

IPC: G01P15/125 ,  F02B1/04 ,  G01P15/09

Abstract: PURPOSE: To make it possible to utilize the characteristics of the arrival signal from a sensor to the maximum limit by filtering the output signal of an amplitude limiter having two CMOS transistors connected to the output of the sensor and changing the level. CONSTITUTION: The signal supplied by a capacitive sensor S or particularly piezoelectric acceleration sensor is processed by a circuit 2 via an interface circuit IC integrated at a single substrate by CMOS technology. At this time, the circuit IC entirely connected to a power source VDD of DC current and ground limits the input signal by an amplitude limiter 3 having two CMOS transistors to protect it against overvoltage. A circuit 4 has an inverting amplifier A connected to a DC power source VR lower than the power source VDD, capacitive impedance circuits Z1 , Z2 converts the signal into DC signal, limits the band width of the signal from the sensor S and attenuates the ultra-low frequency component unnecessary for the signal.

公开(公告)号：JPH03149336A

公开(公告)日：1991-06-25

申请号：JP26618190

申请日：1990-10-02

Applicant: MARELLI AUTRONICA

Inventor： JINO PORITO ,  FURANKO MAROBERUTEI ,  FURANKO SARERUNO

IPC: F02D45/00 ,  F02B1/04 ,  F02P5/152 ,  G01L23/22

Abstract: PURPOSE: To detect pinking by providing comparison and process means with weighted and averaged signals of samples of at least third detection signals which are the last and the second last to be received. CONSTITUTION: Two channels A, B are provided for detecting and processing signals provided by an accelerometric sensor S operating in two frequency bands in which peaks indicative of the occurrence of pinking exist. In each combustion phase, a third channel, also connected to the sensor S, provides a signal representative of the noise component of the signal from the sensor S, in a frequency band in which the peaks do not occur. The signals provided by the channels A, B are integrated and then compared with a reference signal generated in dependence on the noise component of a cylinder detected by the cylinder. Thus, the cylinder producing the pinking is detected.