On-board network for motor vehicles
First Claim
1. An on-board network for motor vehicles with multiplex control for switching, monitoring and controlling a plurality of end devices comprises:
- a plurality of control devices, each control device being connected to end devices in a star configuration, and having signal converters for exchanging end device signals with at least one end device;
a plurality of bus interfaces, each bus interface being connected to said control devices in a star configuration, each bus interface having first transmitter/receiver means for exchanging control device signals with at least one of said control devices, second transmitter/receiver means and processor means, said first and second transmitter/receiver means being coupled to said processor means; and
a common bus, said bus interfaces being connected to said common bus through said second transmitter/receiver means for exchanging data signals amongst said bus interfaces, said processor means in each of said bus interfaces controlling the end devices coupled to the respective bus interface via said control devices and each said bus interface operating substantially independently of said other bus interfaces.
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Accused Products
Abstract
The on-board network for motor vehicles contains a multiplex control for switching, controlling and monitoring electrical end devices such as switches, operating and indicating elements, sensors and actuators and consists of several bus interfaces (2) coupled to a common bus line (1). The network also includes control devices (4) associated in star configuration via signal lines with the bus interfaces and end devices associated with the control devices. The control devices (4) contain signal converters and a data processor as well as transmitters/receivers for exchanging data signals with the corresponding bus interface. The operation of the on-board network is accomplished in such a manner that the transmission of the data signals from one bus interface to the associated control devices is controlled by the bus interface and follows cyclically the respective control device in the sequence of the groups of inputs and outputs. The control devices can deliver here, for transmitting a critical signal value to the corresponding bus interface device at predetermined points of the transmission cycle, a signal which leads to the interruption of the transmission cycle.
157 Citations
15 Claims
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1. An on-board network for motor vehicles with multiplex control for switching, monitoring and controlling a plurality of end devices comprises:
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a plurality of control devices, each control device being connected to end devices in a star configuration, and having signal converters for exchanging end device signals with at least one end device; a plurality of bus interfaces, each bus interface being connected to said control devices in a star configuration, each bus interface having first transmitter/receiver means for exchanging control device signals with at least one of said control devices, second transmitter/receiver means and processor means, said first and second transmitter/receiver means being coupled to said processor means; and a common bus, said bus interfaces being connected to said common bus through said second transmitter/receiver means for exchanging data signals amongst said bus interfaces, said processor means in each of said bus interfaces controlling the end devices coupled to the respective bus interface via said control devices and each said bus interface operating substantially independently of said other bus interfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating an on-board network for motor vehicles with multiplex control for switching, monitoring and controlling a plurality of end devices, wherein the network comprises a plurality of control devices, each control device being connected to end devices in a star configuration, and having signal converters for exchanging end device signals with at least one end device;
- a plurality of bus interfaces, each bus interface being connected to said control devices in a star configuration, each bus interface having first transmitter/receiver means for exchanging control device signals with at least one of said control devices, second transmitter/receiver means and processor means connecting said first and second transmitter/receiver means; and
a common bus, said bus interfaces being connected to said common bus through said second transmitter/receiver means for exchanging data signals amongst said bus interfaces, said bus interfaces operating substantially independently of one another;
the method comprising exchanging data cyclically in a transmission cycle from a bus interface with corresponding control devices, and delivering a signal from the control devices for the interruption of the transmission cycle for the transmission of time critical information to the corresponding bus interface at predetermined points of the transmission cycle. - View Dependent Claims (13, 15)
- a plurality of bus interfaces, each bus interface being connected to said control devices in a star configuration, each bus interface having first transmitter/receiver means for exchanging control device signals with at least one of said control devices, second transmitter/receiver means and processor means connecting said first and second transmitter/receiver means; and
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12. A method for operating an on-board network for motor vehicles with multiplex control for switching, monitoring and controlling a plurality of end devices, wherein the network comprises a plurality of control devices, each control device being connected to end devices in a star configuration, and having signal converters for exchanging end device signals with at least one end device;
- a plurality of bus interfaces, each bus interface being connected to said control devices in a star configuration, each bus interface having first transmitter/receiver means for exchanging control device signals with at least one of said control devices, second transmitter/receiver means and processor means connecting said first and second transmitter/receiver means; and
a common bus, said bus interfaces being connected to said common bus through said second transmitter/receiver means for exchanging data signals amongst said bus interfaces, said bus interfaces operating substantially independently of one another;
the method comprising transmitting from each bus interface signals on the common bus in response to control signals from the signal converters of the associated control devices and internal system states of the bus interface and of the control devices in a cycle, and interrupting the cycle each time a state to be transmitted changes, and transmitting the changed state. - View Dependent Claims (14)
- a plurality of bus interfaces, each bus interface being connected to said control devices in a star configuration, each bus interface having first transmitter/receiver means for exchanging control device signals with at least one of said control devices, second transmitter/receiver means and processor means connecting said first and second transmitter/receiver means; and
Specification