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Throttle inlet absolute air pressure sensor for dirty air filter detection

An air filter and air pressure technology, which is applied in the direction of fuel air filter, dispersed particle filtration, chemical instruments and methods, etc., can solve the problems of increasing cost and manufacturing time

Inactive Publication Date: 2008-08-20
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such conventional hardware adds cost and manufacturing time, and is also a maintenance concern since the correct operation of the sensor must be monitored and if not functioning properly, the sensor must be replaced

Method used

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  • Throttle inlet absolute air pressure sensor for dirty air filter detection
  • Throttle inlet absolute air pressure sensor for dirty air filter detection
  • Throttle inlet absolute air pressure sensor for dirty air filter detection

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Embodiment Construction

[0013] The following description is merely exemplary in nature and is not intended to limit the disclosure, application, or use. For purposes of clarity, the same reference numbers have been used in the drawings to identify similar elements. As used herein, the term module refers to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory, combinational logic that executes one or more software or firmware programs circuits, or other suitable components that provide the described functions.

[0014] As can be seen in FIG. 1 , a vehicle 10 is shown including an engine assembly 12 . The engine assembly 12 includes an internal combustion engine 14 , a throttle valve 16 , an air filter 18 and a control module 20 . The engine 14 includes intake and exhaust manifolds 22 , 24 . An intake manifold 22 provides communication between a source of fresh air and the engine 14 . An air filter 18 and throttle valve 16 ma...

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PUM

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Abstract

A system for detecting contamination of an air filter of an internal combustion engine includes an air pressure sensor disposed downstream of the air filter, an air flow sensor disposed in an engine air intake system, and the air pressure sensor and the air flow Control module for sensor connectivity. The control module is configured to estimate barometric pressure based on a signal received from the air pressure sensor. The control module is further configured to measure air flow through the air filter based on the air flow provided by the air flow sensor and based on the pressure differential between the estimated barometric pressure and a second pressure measurement from the air pressure sensor corresponding to the provided air flow. The air filter contamination level is determined by the pressure drop.

Description

technical field [0001] The present disclosure relates to internal combustion engine airflow, and more particularly to monitoring engine air filter contamination levels. Background technique [0002] The statements in this paragraph merely provide background information related to the present disclosure and may not constitute prior art. [0003] Internal combustion engines combust a fuel and air mixture to produce drive torque. More specifically, air is drawn into the engine through the throttle. Air is mixed with fuel and the air and fuel mixture is compressed within the cylinder using pistons. The air and fuel mixture is combusted within the cylinders to reciprocally drive pistons within the cylinders, which in turn rotationally drive the engine's crankshaft. [0004] Air filters are often used in internal combustion engines to remove pollutants from incoming air. Over a period of use, the air filter becomes clogged and restricts air flow into the engine. This can redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/09
CPCF02M35/09B01D46/0086
Inventor L·K·维金斯V·梅塔
Owner GM GLOBAL TECH OPERATIONS LLC