Engine air-intake control device and engine air-intake control method
First Claim
1. An engine air-intake control device according to this invention includes:
- a driving switch element that is connected in series to a motor, which controls an opening of an intake valve of an engine responsive to a detection output from an accelerator position sensor and a throttle position sensor, and controls a conduction current of said motor;
a power supply interruption element acting as a load circuit power supply interruption element connected to a power supply circuit of said motor, or as a control circuit power supply interruption element connected to a conduction controlling power supply circuit of said driving switch element;
a drive control circuit for generating a conduction drive output in order to control conduction to said driving switch element responsive to a detection output of said accelerator position sensor and throttle position sensor;
a monitoring control circuit that is connected via a serial communication circuit with respect to said drive control circuit, and monitors operation of said drive control circuit; and
status signal detection means for detecting an operation state of said driving switch element and said power supply interruption element, and for supplying a status signal corresponding to the operation state to said drive control circuit or said monitoring control circuit;
wherein said drive control circuit and monitoring control circuit cooperate with each other in accordance with a result of detection of said status signal detection means to generate in a sharing manner a feed drive output in order to bring said power supply interruption element into operation, a feed-inhibit output in order to make said feed drive output reactive, and a conduction-inhibit output in order to make said conduction drive output reactive, whereby said outputs are caused to perform an operation stop or an operation permission of said power supply interruption element and said driving switch element.
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Accused Products
Abstract
A drive control circuit generates a conduction drive output responsive to a detection output of an accelerator pedal depression degree sensor and an air-intake throttle-valve opening sensor, and controls a driving switch element connected to an air-intake throttle-valve opening control motor. A monitoring control circuit drives a control circuit power supply interruption element that closes a control power supply circuit of the driving switch element, and stops control operation of the driving switch element by a conduction-inhibit output. The drive control circuit can stop operation of a power supply interruption element by a feed-inhibit output. At the time of starting operation, a status signal determines activeness of the feed-inhibit output and conduction-inhibit output, after confirming that those outputs are normal, the inhibition is released. Thus, an engine air-take control device capable of reliably stopping the motor upon occurrence of any abnormality thereby improving safety in control is provided.
10 Citations
20 Claims
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1. An engine air-intake control device according to this invention includes:
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a driving switch element that is connected in series to a motor, which controls an opening of an intake valve of an engine responsive to a detection output from an accelerator position sensor and a throttle position sensor, and controls a conduction current of said motor;
a power supply interruption element acting as a load circuit power supply interruption element connected to a power supply circuit of said motor, or as a control circuit power supply interruption element connected to a conduction controlling power supply circuit of said driving switch element;
a drive control circuit for generating a conduction drive output in order to control conduction to said driving switch element responsive to a detection output of said accelerator position sensor and throttle position sensor;
a monitoring control circuit that is connected via a serial communication circuit with respect to said drive control circuit, and monitors operation of said drive control circuit; and
status signal detection means for detecting an operation state of said driving switch element and said power supply interruption element, and for supplying a status signal corresponding to the operation state to said drive control circuit or said monitoring control circuit;
wherein said drive control circuit and monitoring control circuit cooperate with each other in accordance with a result of detection of said status signal detection means to generate in a sharing manner a feed drive output in order to bring said power supply interruption element into operation, a feed-inhibit output in order to make said feed drive output reactive, and a conduction-inhibit output in order to make said conduction drive output reactive, whereby said outputs are caused to perform an operation stop or an operation permission of said power supply interruption element and said driving switch element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification