Denso Corporation

Kenji Mochizuki

Toru Itabashi

Yoshiharu Takeuchi

Naoya Tsuchiya

Yuki Mikami

Yuuki Mikami

Takahito Kusumoto

An electronic control unit includes first and second devices. A transmitter of the first device transmits data to a receiver of the second device by start-stop synchronization communication. On detecting a communication error, the second device transmits a communication stop signal to the first device, recovers the receiver, and transmits a restart signal to the first device when the receiver is recovered. Upon receipt of the communication stop signal, the first device stops the transmitter and initializes a transmission buffer, and commands the transmitter to restart transmitting the data upon receipt of the communication restart signal from the second device.

Electronic control unit

An electronic control unit (ECU), for use with an internal combustion engine, determines whether an abnormal combustion has occurred in the engine. The ECU uses a sensor signal amplifier to amplify a sensor signal from a sensor by changing an amplification power of the sensor signal and an A/D converter to convert the sensor signal amplified to a digital signal (i.e., a digitized sensor signal). The ECU uses an abnormal combustion detector to determine whether an abnormal combustion has occurred based on a characteristic of a waveform of the digitized sensor signal, and performs an abnormal combustion prevention control to prevent the abnormal combustion when an abnormal combustion is detected. An amplification controller is used to set the amplification power of the sensor signal amplifier based on the amplitude of the digitized sensor signal and a determination result of the abnormal combustion by the abnormal combustion detector.

Electronic control unit of internal combustion engine

A signal input circuit includes: a signal input device having a signal input terminal; an inspection capacitor connected between the signal input terminal and a reference potential; a connection unit connecting/disconnecting an inspection path between the inspection capacitor and the signal input terminal; a charge and discharge unit charging/discharging the inspection capacitor; and a determination processing unit carrying out a terminal failure detection processing. The determination processing unit controls the connection unit to disconnect the inspection path and controls the charge and discharge unit to set the voltage of the inspection capacitor to a terminal inspection voltage in a charge and discharge procedure, controls the connection unit to connect the inspection path in a continuity establishing procedure, and detects the terminal failure at the signal input terminal or a communication path from the signal input terminal based on a voltage of the inspection path.

Signal input circuit and integrated circuit

A control apparatus including a non-volatile RAM divided into a plurality of memory regions including ROM region and RAM region, CPU capable of executing a plurality of types of access to the non-volatile RAM and a protecting portion intervening between the CPU and the non-volatile RAM. The protecting portion includes a register for storing address information capable of specifying address ranges corresponding to the ROM region and RAM region among the memory regions of the non-volatile RAM, access enabling module for enabling the CPU to write data to the ROM region while an enable signal inputted to the protecting portion externally is active, when the CPU performs a write-access to the ROM region, and initializing module for initializing the address information stored in the register to be predetermined address information as an initial value when the enable signal is deactivated after activating the enable signal.

Growing community of inventors

Chita-gun, Japan

Kenji Mochizuki