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US 7,114,477 B2Granted
Variable intake system monitoring apparatus
AssigneeHyundai Motor Company
InventorChang-Hyun Shin
Life of this patent
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Abstract
Variable intake systems are provided that include a variable intake valve shaft, potentiometer, pneumatic actuator, Manifold Absolute Pressure sensor, Throttle Position Sensor and controller. Preferred systems of the invention can monitor whether valves of a variable intake system are properly working, thereby stabilizing the operation of the variable intake system in a simplified manner and at low costs.
Claims6
A variable intake system monitoring apparatus, comprising:
- a variable intake valve shaft comprising a plurality of flaps;
- a potentiometer that measures the pivot amount of the variable intake valve shaft;
- a pneumatic actuator that pivots the variable intake valve shaft;
- a vacuum line connecting a surge tank and the pneumatic actuator to provide operational pressure of the pneumatic actuator;
- a Manifold Absolute Pressure (MAP) sensor positioned proximate to the surge tank connected with the vacuum hose;
- a Throttle Position Sensor (TPS) located at a throttle body;
- and
- a controller that detects the operation state of the variable intake valve shaft by receiving signals from the potentiometer, MAP sensor, and TPS,
- wherein the controller monitors and compares the outputted voltage of the potentiometer with data pre-mapped pertaining to the relationship of the output voltage of the potentiometer and rotational angle of the flaps, and detects a disconnection of the vacuum hose from the pneumatic actuator and/or a surge tank via the output voltage of the potentiometer and a signal of the MAP sensor.
6 more elements
A variable intake system monitoring apparatus, comprising:
- a variable intake valve shaft comprising a plurality of flaps;
- a potentiometer that can measure the pivot amount of the variable intake valve shaft;
- a pneumatic actuator that can pivot the variable intake valve shaft;
- a Manifold Absolute Pressure sensor;
- a Throttle Position Sensor located at a throttle body;
- and
- a controller that detects the operation state of the variable intake valve shaft by input from one or more of the potentiometer, Manifold Absolute Pressure sensor, or Throttle Position Sensor,
- wherein the controller monitors and compares the outputted voltage of the potentiometer with data pre-mapped pertaining to the relationship of the output voltage of the potentiometer and rotational angle of the flaps and detects a disconnection of the vacuum hose from the pneumatic actuator and/or a surge tank via the output voltage of the potentiometer and a signal of the MAP sensor.
5 more elements
Dependencies are inferred from the claim text.