Honda Giken Kogyo Kabushiki Kaisha

Katsuhiro Ohuchi

Morio Sato

A communication control apparatus for enabling an A/D converter to be shared among a plurality of input units to eliminate the work for newly installing an A/D converter for a new sensor when the sensor is added. A communication control apparatus is provided which includes input/output lines for connecting an input/output unit and a central control unit to each other and used for transmitting data, the central control unit is provided with an analog to digital converter and is used for carrying out processing of load control based on input data coming from the input/output lines, and the input/output unit. An input side of the input/output unit is connected to sensors and an external switch whereas an output side of the input/output unit is connected to a load such as a motor. The communication control apparatus wherein the input/output lines include transmission lines B,and B,for transmission of digital data and a transmission line A,for transmission of analog data, and the input/output unit transmits specific data indicating a channel of analog data through the transmission line B,when transmitting the analog data.

Communication control apparatus

A transmitting apparatus of simple circuit configuration is provided as having turn off time (cut off delay time) of an output transistor shortened. The potential of a low-level signal is inputted to an input terminal of a first transistor through a resistor. The potential of a high-level signal is inputted to an input terminal of a second transistor through a resistor. A control circuit is connected to the input terminals of the first and second transistors and when a high-level signal is to be transmitted to the communication line, the control circuit enters a high-impedance state with respect to the input terminal of the first transistor and outputs a low-level signal to the input terminal of the second transistor. When a low-level signal is to be transmitted over the communication line, the control circuit outputs a high-level signal to the input terminal of the first transistor and develops a high-impedance state with respect to the input terminal of the second transistor.

Transmitting apparatus for outputting a binary signal

This vehicle communication system is suitable for high speed communication with small signal distortion. The communication system for a vehicle includes, provided with charge and discharge that allow a distributed capacitance of a signal line to be discharged by making a stored charge by-pass a pull-up resistor, or causing the distributed capacitance of the signal line,to be charged up by making a charge by-pass a pull-up resistor. The charge and discharge units charge or discharge for only a fixed period of time. This fixed period of time is shorter than 1 bit length of the signal, from when transistors are switched from on to off. For a node connected through the signal line, this fixed period of time is longer than the time taken for a reception circuit that is providing a reception signal from the signal line to switch on or off.

Vehicle communication system

A communication control device comprises a state change detecting section for outputting, upon detection of a state change in parallel input control signals, a transmission control instruction to a transmitting section. A standby time is provided between the time of detection of the control signal state change and the time of commencement of transmission of the serial signals by the transmitting section. For control signals to operate a controlled object at a desired time, the state change detecting section outputs the transmission control instruction a communication time plus the standby time earlier than the desired time.

Communication control device

A communication system for a vehicle, provided with a balanced cable connecting respective nodes and a comparator for obtaining a receive signal by differentially amplifying a signal from the balanced cable, for carrying out communication between respective nodes, being further provided with a unit for limiting signals input to each input terminal of the comparator to values in mutually different fixed ranges. This provides a vehicle communication system that has high reliability and is resistant to noise.

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Saitama, Japan

Katsuhiro Ohuchi