Electronic throttle control with throttle position sensor system and air flow indicators
First Claim
1. A throttle body assembly comprising:
- a throttle actuator;
an input circuit receiving sensor signals, said input circuit comprising;
a first reference voltage; and
a second reference voltage; and
a third reference voltage;
a first throttle position sensor (TPS) connected to said second reference voltage;
a second TPS connected to said second reference voltage;
a manifold absolute pressure (MAP) sensor connected to said first reference voltage;
a manifold airflow (MAF) sensor connected to said third reference voltage; and
a processor connected to said input circuit and transmitting a control signal to said throttle actuator based on said sensor signals.
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Accused Products
Abstract
Apparatus are provided for an electronic throttle control (ETC) system having a throttle body assembly. The apparatus includes a throttle actuator, an input circuit receiving sensor signals and having first, second, and third reference voltages, a first throttle position sensor (TPS) connected to the second reference voltage, a second TPS connected to the second reference voltage, a manifold absolute pressure (MAP) sensor connected to the first reference voltage, a manifold airflow (MAF) sensor connected to the third reference voltage, and a processor connected to the input circuit and transmitting a control signal to the throttle actuator based on the sensors, reference voltages, and returns. The ETC system has improved remedial actions responsive to failures of the various sensors, reference voltages, and returns.
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Citations
30 Claims
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1. A throttle body assembly comprising:
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a throttle actuator;
an input circuit receiving sensor signals, said input circuit comprising;
a first reference voltage; and
a second reference voltage; and
a third reference voltage;
a first throttle position sensor (TPS) connected to said second reference voltage;
a second TPS connected to said second reference voltage;
a manifold absolute pressure (MAP) sensor connected to said first reference voltage;
a manifold airflow (MAF) sensor connected to said third reference voltage; and
a processor connected to said input circuit and transmitting a control signal to said throttle actuator based on said sensor signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A communication device for failure mode response of a throttle body assembly, said communication device comprising:
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a detector circuit receiving signals from at least one of a first TPS, a second TPS, a MAP sensor, and a MAF sensor, a first reference voltage, a second reference voltage, and a third reference voltage, said detector circuit transmitting an output signal upon determination of a failure mode response corresponding to the received signals; and
a memory coupled with said detector circuit and storing a look-up table of failure mode responses selected from one of a limited throttle displacement, a powered-off throttle, and a no remedial action, the failure mode responses based on at least one of a first order failure and a second order failure of the first TPS, the second TPS, the MAP sensor, the MAF sensor, the first reference voltage, and the second reference voltage. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. In an electronic throttle control system, a method of failure mode response comprising the steps of:
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detecting a first failure from one of a first TPS, a second TPS, a MAP sensor, a MAF sensor, a first reference voltage, a second reference voltage, a TPS correlation error, and a TPS short;
in response to the detected first failure performing one of limiting throttle displacement, powering-off throttle, and no remedial action;
detecting a second failure from one of the first TPS, the second TPS, the MAP sensor, the MAF sensor, the first reference voltage, the second reference voltage, the TPS correlation error, and the TPS short; and
in response to the detected second failure performing one of limiting throttle displacement, powering-off throttle, and no remedial action. - View Dependent Claims (30)
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Specification