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US 5,960,771 AGranted
Method and device for controlling the volume of intake air for an engine
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorShinji Watanabe
Life of this patent
Estimating the term…
Abstract
One of a plurality of preset opening states the output voltage of each of first and second accelerator opening detection units is in and the continuation time of the opening state are judged, failures of the first and second accelerator opening detection units are judged according to judging conditions which are based on the opening state and the continuation time of the opening state, and the throttle valve is controlled based on the result of the judgment.
Claims12
A device for controlling the volume of intake air for an engine comprising:
- failure judging means for judging failures of first accelerator opening detection means and second accelerator opening detection means for detecting the opening of an accelerator;
- and
- throttle control means for controlling a throttle valve for adjusting the volume of intake air for an engine to a target opening based on an output value of the first accelerator opening detection means, wherein
- the failure judging means comprises opening judging means for judging which one of a plurality of opening states classified according to a plurality of preset;
- reference voltages the output of each of the first and second accelerator opening detection means is in and continuation time judging means for judging the continuation time of the opening state of the output of each of the first and second accelerator opening detection means reaches a preset reference time, and the throttle control means controls the opening of the throttle valve based on an output value of the second accelerator opening detection means in place of an output value of the first accelerator opening detection means when a continuation time during which the output of the first accelerator opening detection means is in an opening state higher in voltage than a first predetermined opening state and the output of the second accelerator opening detection means is in a second opening state lower in voltage than the first opening state reaches the reference time.
2 more elements
A method for controlling the volume of intake air for an engine which comprises:
- judging which one of a plurality of opening states classified according to a plurality of preset reference voltages the output of each of first and second accelerator opening detection means for detecting the opening of an accelerator is in;
- and
- controlling the opening of a throttle valve based on an output value of the second accelerator opening detection means in place of an output value of the first accelerator opening detection means when a continuation time during which the output of the first accelerator opening detection means is in an opening state higher in voltage than a first predetermined opening state and the output of the second accelerator opening detection means is in a second opening state lower in voltage than the first opening state reaches a preset reference time.
Dependencies are inferred from the claim text.