Control system of internal combustion engine with output correcting means of thermal type air flow sensor
US6810859B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 15, 2003 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Jul 15, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/503
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed here is a control unit employed for an internal combustion engine and provided with air flow sensor output correcting element capable of correcting a detected voltage error to occur in the air flow sensor according to a surge voltage and a supply voltage at each actuation of the thermal type air flow sensor. The thermal type air flow sensor output correcting element includes surge time measuring element for measuring a surge time in a value detected in the thermal type air flow sensor at the time of the sensor power on and supply voltage detecting means. The output correcting element thus calculates a warming-up characteristic correction amount for the thermal type air flow sensor according to the measured surge time and the detected supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.