Vehicular accessory diagnostic system
First Claim
1. A vehicular accessory diagnostic system for diagnosis of an accessory device of a vehicle using an in-vehicle network, comprising:
- a control unit that controls operation of the accessory device;
a sensor that generate an output for the diagnosis; and
a diagnostic unit that diagnoses an operating condition of the control unit, wherein the control units and the diagnostic unit are connected to the in-vehicle network, the control unit transmits data to the in-vehicle network, the diagnostic unit receives the data transmitted by the control units via the in-vehicle network, the control units has data transmitting means that transmits data produce by adding first time data to any one of internal data thereof, data on instantaneous value of the sensor output, and data on instantaneous value of an output of the control unit to the diagnostic unit via the in-vehicle network, the diagnostic unit has transmitted data storing means and measurement data storing means, the transmitted data storing means receives and stores the data transmitted by the data transmitting means of the control unit, and the measurement data storing means stores measurement data produced by adding second time data to data on an instantaneous value of any one of a first sensor output, a second sensor output, a first control unit output, and a second control unit output that are measured without using the in-vehicle network.
1 Assignment
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Accused Products
Abstract
A control unit receives a sensor output and performs signal processing on the sensor output to produce an internal signal. The control unit produces internal data by adding time data to an internal signal and transmits the internal data to an in-vehicle network. A diagnostic unit receives the internal data from the in-vehicle network and stores the internal data in an internal data storing device. The diagnostic unit also receives a measurement signal produced based on the sensor output. The diagnostic unit produces external data by adding time data containing time at which the second timer resets a time count when an ignition switch is closed and stores the external data. The diagnostic unit reproduces the internal data and the external data and extracts the internal signal and the measurement signal. The diagnostic unit displays or stores the internal signal and the measurement signal according to the time data.
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Citations
14 Claims
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1. A vehicular accessory diagnostic system for diagnosis of an accessory device of a vehicle using an in-vehicle network, comprising:
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a control unit that controls operation of the accessory device;
a sensor that generate an output for the diagnosis; and
a diagnostic unit that diagnoses an operating condition of the control unit, wherein the control units and the diagnostic unit are connected to the in-vehicle network, the control unit transmits data to the in-vehicle network, the diagnostic unit receives the data transmitted by the control units via the in-vehicle network, the control units has data transmitting means that transmits data produce by adding first time data to any one of internal data thereof, data on instantaneous value of the sensor output, and data on instantaneous value of an output of the control unit to the diagnostic unit via the in-vehicle network, the diagnostic unit has transmitted data storing means and measurement data storing means, the transmitted data storing means receives and stores the data transmitted by the data transmitting means of the control unit, and the measurement data storing means stores measurement data produced by adding second time data to data on an instantaneous value of any one of a first sensor output, a second sensor output, a first control unit output, and a second control unit output that are measured without using the in-vehicle network. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicular accessory diagnostic system for diagnosis of an accessory device of a vehicle using an in-vehicle network, comprising:
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a control unit that controls operation of the accessory device;
a sensor that generates an output for the diagnosis; and
a diagnostic unit that diagnoses an operating condition of the control unit, wherein the control unit and the diagnostic unit are connected to the in-vehicle network, the control unit has data receiving and transmitting means, internal data preparing means, first time counting means, and transmitting data preparing means, the data receiving and transmitting means receives the sensor output and transmits transmitting data prepared by the transmitting data preparing means to the diagnostic unit, the internal data preparing means prepares internal data based on the sensor output, the first time counting means produces first time data, the transmitting data preparing means prepares the transmitting data by adding the first time data to the internal data, the diagnostic unit has transmitted data storing means, second time counting means, measurement data preparing means, and measured data recording means, the transmitted data storing means stores the transmitting data, the second time counting means produces second time data, the measurement data preparing means prepares measurement data by measuring the sensor output and adding the second time data to the sensor output, and the measurement data storing means stores the measurement data. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A vehicular accessory diagnostic system for diagnosis of an accessory device of a vehicle using an in-vehicle network that controls data transmission based on priority determined based on one of communication traffic and vehicle controlling condition, comprising:
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a control unit that controls operation of the accessory device;
a sensor that generates an output for the diagnosis; and
a diagnostic unit that diagnoses an operating condition of the control unit, wherein the control unit and the diagnostic unit are connected to the in-vehicle network, the control unit has data receiving and transmitting means, internal data preparing means, first time counting means, and transmitting data preparing means, the data receiving and transmitting means receives the sensor output and transmits transmitting data prepared by the transmitting data preparing means to the in-vehicle network by packet transmission, the internal data preparing means prepares the internal data based on the sensor output, the first time counting means produces first time data, the transmitting data preparing means prepares the transmitting data by adding the first time data and an error detection code to the internal data, the diagnostic unit has error detecting means, transmitted data storing means, second time counting means, measurement data preparing means, signal processing means, and measured data storing means, the error detecting means determines whether an error is present in the internal data;
the transmitted data storing means stores the transmitting data, the second time counting means produces second time data, the measurement data preparing means prepares measurement data by measuring the sensor output and adding the second time data to the measured sensor output, the signal processing means arranges the transmitting data in chronological order based on the first time data for display or store when more than one transmitting data are stored by the transmitted data storing means, and the signal processing means arranges the measurement data in chronological order based on the second time data for display or store when more than one measurement data are stored by the measurement data storing means.
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Specification