System and method for controlling an electro-pneumatic device
First Claim
1. An electro-pneumatic device, comprising:
- a sensor portion, including a sensor, receiving and transmitting electronic control signals of a plurality of frequencies via a power and control bus, the sensor portion being powered by a first of the frequencies of the control signals received by the sensor portion during a first time period; and
a valve portion electrically communicating with the sensor via the power and control bus, the valve portion including a valve being alternately set to an open state and a closed state based on a second of the plurality of frequencies of the received control signals, the sensor sensing a delivery pressure of the valve and transmitting electronic data signals representing the delivery pressure at a third of the plurality of frequencies, the first frequency being faster than the second frequency, the third frequency being faster than the first frequency, the third frequency being superimposed with the first frequency in the control signals received by the sensor portion during a second time period, which is after the first time period, and the third frequency being superimposed with the second frequency in the control signals received by the sensor portion during a third time period which is after the second time period.
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Accused Products
Abstract
An electro-pneumatic device includes a sensor portion and a valve portion. The sensor portion, which includes a sensor, receives and transmits electronic control signals of a plurality of frequencies. The sensor portion is powered by a first of the frequencies of the received control signals. The valve portion electrically communicates with the sensor. The valve portion includes a valve that is alternately set to an open state and a closed state based on a second of the plurality of frequencies of the received control signals. The sensor senses a delivery pressure of the valve and transmits electronic data signals representing the delivery pressure at a third of the plurality of frequencies.
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Citations
19 Claims
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1. An electro-pneumatic device, comprising:
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a sensor portion, including a sensor, receiving and transmitting electronic control signals of a plurality of frequencies via a power and control bus, the sensor portion being powered by a first of the frequencies of the control signals received by the sensor portion during a first time period; and a valve portion electrically communicating with the sensor via the power and control bus, the valve portion including a valve being alternately set to an open state and a closed state based on a second of the plurality of frequencies of the received control signals, the sensor sensing a delivery pressure of the valve and transmitting electronic data signals representing the delivery pressure at a third of the plurality of frequencies, the first frequency being faster than the second frequency, the third frequency being faster than the first frequency, the third frequency being superimposed with the first frequency in the control signals received by the sensor portion during a second time period, which is after the first time period, and the third frequency being superimposed with the second frequency in the control signals received by the sensor portion during a third time period which is after the second time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A communication system between an electro-pneumatic valve and an electronic control unit, comprising:
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a power and control bus; an electronic control unit electrically communicating with the power and control bus and; an electro-pneumatic device electrically communicating with the power and control bus, the electro-pneumatic device including; a sensor portion transmitting/receiving electronic control messages to/from the electronic control unit via the power and control bus, the electronic control in messages including control signals at a plurality of frequencies, the sensor portion being powered by a first of the frequencies of the control signals received by the electro-pneumatic device during a first time period; and a valve portion electrically communicating with the sensor portion, the valve portion including a valve that is alternately set to an open state and a closed state based on a second of the plurality of frequencies of the received control signals, the sensor sensing a delivery pressure of the valve and transmitting to the electronic control unit, via the power and control bus, data signals representing the delivery pressure, the data signals being transmitted at a third of the plurality of frequencies, the first frequency being faster than the second frequency, the third frequency being faster than the first frequency, the data signals of the third frequency being superimposed with the control signals of the first frequency received by the electro-pneumatic device during a second time period, which is after the first time period, and the data signals of third frequency being superimposed with the control signals of the second frequency received by the electro-pneumatic device during a third time period which is after the second time period. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for controlling an electro-pneumatic device, the method comprising:
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transmitting a control signal of a first frequency from an electronic control unit to an electro-pneumatic device during a first time period, via a power control bus, for powering a sensor in the electro-pneumatic device; transmitting a control signal of a second frequency from the electronic control unit to the electro-pneumatic device, via the power control bus, for controlling a state of a valve in the electro-pneumatic device; sensing a delivery pressure of the valve; transmitting a data signal, representing the delivery pressure, of a third frequency from the electro-pneumatic device to the electronic control unit via the power control bus, the first frequency being faster than the second frequency, the third frequency being faster than the first frequency; superimposing the data signal of the third frequency with the control signal of the first frequency during a second time period; and superimposing the data signal of the third frequency with the control signal of the second frequency during a third time period. - View Dependent Claims (17, 18, 19)
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Specification