Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Koji Yuasa

Yusuke Abe

Toshihisa Arai

Takashi Nomura

Toshifumi Miyake

Masahiro Toyohara

Yasushi Sugiyama

Chihiro Sato

Yasuhiko Okada

Motoki Tatsumi

Takuya Kobayashi

Shinichiro Yoneoka

Hiroyuki Takada

Yohei Takahashi

Masahiro Sonoda

An electronic control device comprises an electronically rewritable nonvolatile memory which has first storage area and second storage area. The first storage area stores a control program in which control data is embedded, and the second storage area stores a plurality of control data usable for the control program and a rewrite program for rewriting the control data of the control program to one piece of control data selected from the plurality of control data.

Electronic control device and method for setting control data

An electronic control unit for vehicle capable of receiving a program by communication expands the received program in a volatile memory and executes the expanded program. As an example of this program, there is a program for changing a communication environment for communicating with another unit.

Electronic control unit for vehicle and method of executing program

An electronic control unit for a vehicle including a nonvolatile memory capable of erasing and writing data electrically and two buffers to acquire, by communication, divided data obtained by dividing a program by predetermined size. Then, in parallel with using the two buffers alternately to receive divided data, the electronic control unit for a vehicle uses one buffer that is not used to receive divided data to write the received divided data into the nonvolatile memory.

Electronic control unit for vehicle and method of writing data

An ECU includes a RAM; a non-volatile memory; and a controller for controlling reading of data from, and writing of data into, the RAM and non-volatile memory. The controller is configured to: store data generated during operation into the RAM, write the data into a storage area of the non-volatile memory when the operation stops, and read the data from the non-volatile memory into the RAM when the operation starts, and control a control target using the data. When determining that an improper reset is expected, the controller writes at least part of the data generated during the operation and stored in the RAM into a save area, different from the data storage area, of the non-volatile memory. When the operation restarts from the improper reset, the controller reads, into the RAM, the data that has been written in the storage and save areas.

Electronic control unit and data protection method therefor

A vehicle control apparatus according to the present invention includes a main electronic control unit, and a sub electronic control unit capable of mutual communication with the main electronic control unit. The main electronic control unit outputs a signal for preventing timeout to at least one of the external device and the sub electronic control unit, when mediating data communication between the external device and the sub electronic control unit.

Vehicle control apparatus and method for rewriting program therefor

A control unit () includes a microcontroller () that sets a duty ratio corresponding to a target current value of a linear solenoid () and an ASIC () that supplies electricity to the linear solenoid () based on the duty ratio. The microcontroller () includes a correction unit () that corrects a driving current value detected by a current sensor (). The ASIC () includes a correction unit () that corrects the driving current value detected by the current sensor (). A feedback amount selection unit () selects either one of the driving current value corrected by the correction unit () or the driving current value corrected by the correction unit () as a feedback amount corresponding to the target current value. A dual correction system is provided in a feedback control system.

Control device and control method for actuator

An electronic control unit includes: a nonvolatile memory capable of erasing data in units of erasure blocks and also writing data in units of write blocks smaller than the erasure blocks; and a processor. In response to a data rewrite request from outside, the processor of the electronic control unit erases data in a portion of the nonvolatile memory in units of erasure blocks and writes data into the portion of the nonvolatile memory in units of write blocks. The amount of data sent to the electronic control unit from outside is thereby decreased and the time needed to rewrite data in the nonvolatile memory is reduced.

Electronic control unit and method for rewriting data

An electronic control unit for a vehicle includes a nonvolatile memory that is capable of erasing and writing data electrically, and capable of receiving a program to be written into the nonvolatile memory in units of a predetermined size by means of communication using a communication buffer. The electronic control unit for the vehicle uses communication buffers, the number of which is greater than the number of communication buffers used in an in-vehicle communication environment, to receive the program.

Electronic control unit for vehicle and data communication method

In a vehicle control device in which a driver circuit which does not have a computing function and a computing device communicate with each other, there is provided a technology which can efficiently diagnose that both the driver circuit and the computing device normally communicate with each other by a simple technique. The vehicle control device according to the present invention transmits diagnosis data as a control command from a computing portion to the driver circuit, and the driver circuit sends inverted diagnosis data in which the diagnosis data is bit-inverted back to the computing portion. The computing portion diagnoses whether or not the communication between the computing portion and the driver circuit is normally performed, by using the diagnosis data and the inverted diagnosis data.

Vehicle control device

An automotive electronic control unit receives rewrite data wirelessly transmitted in units of a predetermined size from an external device and rewrites data stored in a nonvolatile memory based on the rewrite data. At this time, the rewrite data is communicated by switching between broadcast communication and unicast communication, or between multicast communication and unicast communication.

Growing community of inventors

Isesaki, Japan

Koji Yuasa