Patent application number | Description | Published |
20130015797 | ELECTRONIC CONTROL UNIT FOR VEHICLE AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICEAANM ITOU; AkitoAACI Kariya-cityAACO JPAAGP ITOU; Akito Kariya-city JP - A semiconductor integrated circuit device for an electronic control unit includes a drive circuit, a prohibition circuit and a pulse monitor circuit. The drive circuit drives an in-vehicle load according to a driving signal outputted from a microcomputer. The pulse monitor circuit monitors a pulse signal outputted from the microcomputer when the microcomputer is in a normal state. The pulse monitor circuit resets the microcomputer and instructs the prohibition circuit to prohibit the drive circuit from driving the in-vehicle load when it is determined that the microcomputer is in an abnormal state. Further, the pulse monitor circuit instructs the prohibition circuit to permit the drive circuit to drive the in-vehicle load when it is determined that the microcomputer is in the normal state after resetting of the microcomputer. | 01-17-2013 |
20130036803 | CYLINDER INNER PRESSURE DETECTOR FOR INTERNAL COMBUSTION ENGINE - An cylinder inner pressure detector of an internal combustion engine includes: a reference voltage output circuit for outputting a reference voltage having a level, which is selected among multiple levels according to a switching signal; a level shift circuit for shifting a level of a sensor signal of an inner pressure sensor by a selected level of the reference voltage toward a signal potential side corresponding to a low pressure side of cylinder inner pressure; a first A/D converter circuit for converting the shifted sensor signal from an analog signal to a digital signal; and a controller for outputting the switching signal, which provides the reference voltage such that the reference voltage has the level on the signal potential side corresponding to the low pressure side from an offset voltage, and for detecting the cylinder inner pressure based on the digital signal output from the first A/D converter. | 02-14-2013 |
20130060451 | ABNORMAL COMBUSTION DETECTION APPARATUS AND CONTROL UNIT OF INTERNAL COMBUSTION ENGINE - An abnormal combustion detection apparatus detects an abnormal combustion of an internal combustion based on a vibration waveform from a vibration sensor attached to the internal combustion engine. A gain circuit of the apparatus amplifies or attenuates the vibration waveform from the vibration sensor, an AD conversion circuit converts a waveform provided by the gain circuit to digital data, and a gain switching unit switches a gain of the gain circuit from a small gain value to a large gain value at a gain switch timing. The gain switching unit separates a large abnormal combustion from a small abnormal combustion in an abnormal combustion determination period for maximizing a dynamic range of an AD conversion circuit and for securely detecting a change of waveform amplitude in case of gain switching in an abnormal combustion detection operation. | 03-07-2013 |
20130070932 | FAILURE DETECTION DEVICE FOR VEHICLE SPEAKER - A failure detection device for a vehicle speaker includes a signal generator, an amplifier, a coupling capacitor, a supply circuit, a detection circuit, and a determination section. The signal generator generates a sound signal corresponding to sound outputted from the speaker. The amplifier amplifies the sound signal. The capacitor supplies the amplified sound signal to the speaker. The supply circuit supplies a direct-current test current to the speaker so that the test current does not flow through the capacitor by applying a test voltage to the speaker. The test voltage is higher than a voltage of the sound signal. The detection circuit detects a terminal voltage of the speaker. The determination section determines whether at least one of an open-circuit and a short-circuit occurs in the speaker based on the terminal voltage during application of the sound signal to the speaker. | 03-21-2013 |
20130070933 | FAILURE DETECTION DEVICE FOR VEHICLE SPEAKER - A failure detection device for a vehicle speaker includes a signal generator, an amplifier, a coupling capacitor, a detection circuit, and a determination section. The signal generator generates a sound signal corresponding to a sound outputted from the speaker. The amplifier amplifies the sound signal generated by the signal generator. The coupling capacitor supplies the sound signal amplified by the amplifier to the speaker. The detection circuit directly or indirectly detects a terminal voltage on a terminal of the speaker. The determination section determines whether an open-circuit occurs in the speaker based on a phase difference between a phase of the sound signal and a phase of the terminal voltage. The terminal of the speaker is coupled to the coupling capacitor. | 03-21-2013 |
20130096812 | SENSOR SIGNAL PROCESSING DEVICE - A sensor signal processing device includes an AD conversion section, a filter section, a timing signal generation section, and an arithmetic section. The timing signal generation section generates a signal synchronized with a crank angle of an engine based on a signal indicating the crank angle and generates a data acquisition timing signal by compensating the signal synchronized with the crank angle with a delay time of the filter. The arithmetic section acquires a plurality of sensor signals, which is transmitted from a sensor, converted from an analog signal to a digital signal by the AD conversion section, and filtered by the filter section, in a term before and after receiving the data acquisition timing signal and generates a data synchronized with the data acquisition timing signal. | 04-18-2013 |
20130114178 | RELAY DRIVE UNIT - A relay drive unit drives a relay by supplying a power source voltage from a battery. The relay drive unit includes a power source voltage detector, a drive signal generator, and a relay drive circuit. The power source voltage detector detects the power source voltage. The drive signal generator generates a PWM signal as a drive signal for maintaining the relay in an ON state. The PWM signal has a preset duty ratio according to a magnitude of the power source voltage detected by the power source voltage detector. The relay drive circuit turns a supply of the power source voltage from the battery on/off based on a duty ratio of the drive signal generated by the drive signal generator. | 05-09-2013 |
20130168136 | MULTILAYER PRINTED CIRCUIT BOARD - A multilayer printed circuit board includes an insulating substrate, circuit layers arranged in the insulating substrate, an electronic component, an electrode disposed on the circuit layer exposed from a surface of the insulating substrate and including a soldered portion at which a terminal of the electronic component is soldered, an internal layer conductor disposed on the circuit layer located inside the insulating substrate and defining through holes in a radial manner centering on the soldered portion, a heat releasing conductor disposed on the circuit layer next to the circuit layer on which the internal layer conductor is disposed, and connection vias inserted in the through holes and coupling the electrode and the heat releasing conductor so as to enable a heat transfer between the electrode and the heat releasing conductor. The internal layer conductor and the heat releasing conductor overlap a whole area of the soldered portion. | 07-04-2013 |
20130179052 | SENSOR SIGNAL PROCESSING DEVICE - A microcomputer is formed of a CPU and a detection circuit and inputs sensor signals of a vibration sensor and a rotation sensor. The detection circuit includes an AD converter circuit for AD conversion of the sensor signal of the vibration sensor at a predetermined sampling interval, a peak hold circuit for detecting a peak value of the sensor signal, a RAM for storing the peak value, a counter for detecting a crank angle at a peak value detection time, and an angle calculation part. The microcomputer divides a pre-ignition check interval into plural interval units and checks the pre-ignition based on the peak value detected in each unit interval. The pre-ignition and the knock are checked by using different threshold values in an interval, in which the pre-ignition check interval overlaps a knock check interval. | 07-11-2013 |
20140068126 | COMMUNICATION SYSTEM - A communication system having a plurality of communication nodes connected by a communication bus is provided. The system allows at least one non-periodical data message to have a higher priority order than a periodical data message that is transmitted in response to a periodically-transmitted reference message from a master node ECU. In such a manner, a transmission of an urgent non-periodical data message has a higher priority than a transmission of the periodical data message. As a result, a wait time before a start of a transmission of the non-periodical data message is reduced. | 03-06-2014 |
20140241370 | DATA RELAY APPARATUS - A first receiver receives an activation signal from a first network and gives the activation signal to an input side of a second transmitter via a first connection line; thereby, the activation signal is sent out via the second transmitter to a second network. Thus, the activation signal is not directly transmitted from the first network to the second network; instead, the activation signal is transmitted by using conversion functions of the first receiver and the second transmitter. This configuration can prevent occurrence of distortion or attenuation in the activation signal. The activation signal from the first network thus enables ECUs belonging to the second network to be activated certainly without delay. | 08-28-2014 |
20140245046 | COMMUNICATION NODE - When an ECU serving as a communication node is under sleep mode, a switch portion in a transceiver connects a data transmit port of a microcomputer to a memory controller. The microcomputer sends, to the memory controller, a code write-in request for writing a code while outputting a write data that is written as the code. The data transmit port, which is to output a communication data, is commonly used in order to output the write-in request and the write data; this suppresses the increase in the number of connection lines between the microcomputer and the transceiver and the increase in the number of ports of the microcomputer. | 08-28-2014 |
20150026502 | RESET SIGNAL CONTROL APPARATUS - A reset signal control apparatus outputs a reset signal to a microcomputer to restrict a malfunction of the microcomputer when the microcomputer is started. The reset signal control apparatus outputs the reset signal to the microcomputer at least until a clock signal provided by an oscillation circuit and based on which the microcomputer operates is stabilized. The reset signal control apparatus includes a power supply section, a measuring section, and an output ending section. The power supply section supplies a power to the oscillation circuit and the microcomputer. The measuring section measures a consumption current of the oscillation circuit and the microcomputer. The output ending section determines that the clock signal provided by the oscillation circuit is stabilized and ends an output of the reset signal to the microcomputer when the consumption current becomes equal to or higher than a predetermined threshold value. | 01-22-2015 |