Vehicle communication system
First Claim
1. A vehicle communication system equipped with a plurality of electric devices connected to a first communication line to execute data communication through the first communication line, wherein:
- said first communication line is one arranged in a vehicle to feed the electric power to said electric devices; and
some of said electric devices are further connected as special electric devices to a second communication line, and the data communication among said special electric devices is executed through two systems of said first communication line and said second communication line.
1 Assignment
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Accused Products
Abstract
An O2 sensor, an intake air temperature sensor, an engine coolant temperature sensor, a knock sensor, an electronic fuel injection device, a VSC ECU, a transmission ECU and an engine ECT are connected to a power line to communicate with one another through the power line. The VSC ECU, transmission ECU and engine ECU are further connected to a communication line to communicate with one another through two systems of the power line and a communication line. This makes it possible to improve the reliability while decreasing the number of the lines.
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Citations
47 Claims
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1. A vehicle communication system equipped with a plurality of electric devices connected to a first communication line to execute data communication through the first communication line, wherein:
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said first communication line is one arranged in a vehicle to feed the electric power to said electric devices; and
some of said electric devices are further connected as special electric devices to a second communication line, and the data communication among said special electric devices is executed through two systems of said first communication line and said second communication line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vehicle communication system in which a plurality of electric devices mounted on the vehicle are provided with communication means for communicating the data through a communication line arranged in the vehicle to exchange the data among the electric devices, wherein each of said electric devices is provided with:
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a plurality of communication means for communicating the same data using different communication lines; and
selection means for selecting normally received data out of a plurality of data received by using said plurality of communication means; and
wherein one of said plurality of communication means is a low-speed communication means for communicating the data at a speed slower than that of the other communication means, so that the data communication through said low-speed communication means exhibits higher reliability than that of the other communication means. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A vehicle communication system provided with a plurality of car-mounted networks separately depending upon the functions and systems of said electric devices so as to transmit and receive the data among the electric devices by providing said electric devices mounted on the vehicle with first communication means for communicating the data among said electric devices through communication lines dedicated to the networks, wherein
each of the electric devices constituting said car-mounted networks comprises: -
second communication means for transmitting and receiving, among the data transmitted and received to and from the other electric devices through said first communication means, the predetermined important data through a backup communication line which is common to the car-mounted networks arranged in the vehicle; and
selection means for selecting normal and important data out of the important data obtained through said first communication means and said second communication means. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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- 29. A vehicle communication system in which the electric devices mounted on the vehicle are provided with communication means for executing the data communication through the communication lines arranged in the vehicle to transmit and receive the data among the electric devices, and wherein said communication means transmits and receives the same data a plural number of time through the communication lines, and the electric devices are provided with selection means for selecting normally received data out of the plurality of data obtained after having been transmitted and received the plural number of times through said communication means.
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34. A communication system for a vehicle drive system in which electric devices in the vehicle drive system each include:
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a shift position instruction detector unit provided in the operation unit that instructs the shift position of the transmission upon the external operation, in order to detect a shift position instruction input from said operation unit; and
a shift position control unit which sets an optimum shift position adapted to the vehicle based upon the shift position instruction detected by the shift position instruction detector means and upon the operating conditions of the vehicle, and changes the shift position of said transmission over to said optimum shift position;
are connected together through a first communication line for data communication, and at least said shift position control unit is allowed to obtain the shift position instruction and the operating conditions of the vehicle necessary for the shift position control operation from the other electric devices inclusive of said shift position instruction detector device by the data communication using said first communication line, wherein said electric devices are further connected together through a second communication line different from said first communication line, and at least said shift position instruction is transmitted from said shift position instruction detector device to the other electric devices through two systems comprising said first communication line and said second communication line. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification