Honda Motor Co., Ltd.

Keihin Corporation

Shinichi Daibo

Takeshi Yamada

Yuzuru Takashima

Haruki Umeya

Taku Yoshikawa

Masaki Tanno

Yuichi Kobata

Daisuke Hoshi

An electronic control unit includes a processor performing a process necessary for a charging control based on a pilot signal, an input circuit disposed in a stage preceding an input port of the processor, and a pseudo-signal supply circuit supplying a pseudo-pilot signal to a pilot signal line under the control of the processor, and the processor performs a malfunction diagnosis for the input circuit based on a signal state of the input port when controlling the pseudo-signal supply circuit to supply the pseudo-pilot signal to the pilot signal line.

Electronic control unit

An electronic control unit includes a pilot voltage setting circuit that changes a voltage of a pilot signal in a stepwise manner, a processor that controls the pilot voltage setting circuit to change the voltage of the pilot signal, an input buffer that is disposed in a stage preceding a pilot signal input port of the processor, and an input buffer voltage setting circuit that changes an input voltage of the input buffer so as to be within a recommended input voltage range of the input buffer based on the change in the voltage of the pilot signal.

A processor of an electronic control unit performs at least one of a first diagnosis process of determining whether or not a switching element is abnormal based on a signal output from an abnormality diagnosis circuit in a state where a first diagnosis voltage supply circuit is controlled to supply a first diagnosis voltage to a control line and a second diagnosis process of determining whether or not a pilot signal line is abnormal based on the signal output from the abnormality diagnosis circuit obtained in a state where a second diagnosis voltage supply circuit is controlled to supply a second diagnosis voltage to the pilot signal line.

The present invention provides an electronic control device including a processing unit having a function of shifting to a sleep mode in which the processing unit is adapted to start up from the sleep mode according to occurrence statuses of one or more startup factors, and shift to the sleep mode according to a system power supply voltage.

Electronic control device and vehicle control system

An electronic control device includes: a processing unit that performs a predetermined process in accordance with a program; a watchdog timer that includes a time counter reset by a pulse signal output at a given period from the processing unit and outputs a signal having levels inverted depending on whether an overflow occurs; and a latch circuit that latches the signal output from the watchdog timer and outputs a signal obtained through the latching as a first output enable signal. The processing unit stops the output of the pulse signal, when diagnosing a malfunction of the watchdog timer, and diagnoses the malfunction of the watchdog timer based on the first output enable signal output from the latch circuit, after stopping the output of the pulse signal.

Electronic control device with watchdog timer and processing unit to diagnose malfunction of watchdog timer

The present invention provides an electronic control device including: a processing unit having a function of transition to a sleep mode; and a watch dog timer having a time counter that resets in response to a pulse signal outputted from the processing unit at certain intervals, this watch dog timer outputting a signal having a level inverted according to the existence or absence of overflow occurrence, in which the electronic control device further includes a latch circuit that latches the signal outputted from the watch dog timer and outputs a signal obtained through the latching as a first output enable signal, and the processing unit stops outputting the pulse signal before transition to the sleep mode, and carries out failure diagnosis of the watch dog timer based on the first output enable signal outputted from the latch circuit after output of the pulse signal is stopped.

Growing community of inventors

Utsunomiya, Japan

Shinichi Daibo