Diagnostics for electronic transmission control system
First Claim
1. An electronic control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for shifting the transmission state, the electronic control apparatus comprising:
- an operator input means for generating a desired transmission state signal corresponding to manual operator input;
a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission; and
a logic control unit connected to the motor, said operator input means and said transmission state sensing means, said logic control unit includingmeans for determining if said desired transmission state signal differs from said present transmission state signal,means for controlling the motor to shift the transmission to said desired transmission state when said desired transmission state signal differs from said present transmission state signal,means for detecting any faults in controlling the motor to shift the transmission to said desired transmission state,means for storing a fault code corresponding to any detected faults, andmeans for generating an operator-perceivable output indicating any stored fault codes in response to a particular input at said operator input means.
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0 Petitions
Accused Products
Abstract
The present invention is an electronic control apparatus for control of an automatic transmission in a motor vehicle which controlling a motor to shift the transmission to said desired transmission state when the desired transmission state differs from the present transmission state signal. The electronic control apparatus detects and stores any faults in controlling the motor, and generates an output indicating any stored fault codes in response to a particular operator input. In the preferred embodiment the operator input is via plural push-buttons with corresponding lamps. In normal operation a single lamp is turned ON to indicate the present gear. Fault codes are indicated by turning ON the lamps in a code corresponding to the fault code. Detected faults include invalid transmission state signal, time out without completing the shift and over current in the motor. The preferred embodiment further includes an input/output port for receiving commands to read the stored fault codes, to read vehicle condition inputs to the electronic controller and to cause the electronic controller to control the motor to shift the transmission to a commanded state.
40 Citations
23 Claims
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1. An electronic control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for shifting the transmission state, the electronic control apparatus comprising:
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an operator input means for generating a desired transmission state signal corresponding to manual operator input; a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission; and a logic control unit connected to the motor, said operator input means and said transmission state sensing means, said logic control unit including means for determining if said desired transmission state signal differs from said present transmission state signal, means for controlling the motor to shift the transmission to said desired transmission state when said desired transmission state signal differs from said present transmission state signal, means for detecting any faults in controlling the motor to shift the transmission to said desired transmission state, means for storing a fault code corresponding to any detected faults, and means for generating an operator-perceivable output indicating any stored fault codes in response to a particular input at said operator input means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for shifting the transmission state, the electronic control apparatus comprising:
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an operator input means for generating a desired transmission state signal corresponding to manual operator input; a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission; a plurality of vehicle state sensing means for generating respective vehicle state signals indicative of the operation state of the motor vehicle; an input/output port for transmitting commands to said electronic control apparatus and receiving data from said electronic control apparatus; and a logic control unit connected to the motor, said operator input means, said transmission state sensing means and said input/output port, said logic control unit including means for determining if said desired transmission state signal differs from said present transmission state signal, means for controlling the motor to shift the transmission to said desired transmission state when said desired transmission state signal differs from said present transmission state signal, if said plurality of vehicle state signals indicate a permitted transmission state change, and means for transmitting data to said input/output port indicative of said respective vehicle state signals in response to a corresponding read input command at said input/output port. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An electronic control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for shifting the transmission state, the electronic control apparatus comprising:
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an operator input means for generating a desired transmission state signal corresponding to manual operator input; a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission; an input/output port for transmitting commands to said electronic control apparatus; and a logic control unit connected to the motor, said operator input means, and said input/output port, said logic control unit including means for determining if said desired transmission state signal differs from said present transmission state signal, means for controlling the motor to shift the transmission to said desired transmission state when said desired transmission state signal differs from said present transmission state signal, and means for controlling the motor to shift the transmission to a particular transmission state in response to a corresponding output command at said input/output port.
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Specification