Invention Grant
- Patent Title: Apparatus of estimating fuel state
- Patent Title (中): 估计燃料状态的装置
-
Application No.: US13435933Application Date: 2012-03-30
-
Publication No.: US09157389B2Publication Date: 2015-10-13
- Inventor: Yoshiharu Nonoyama , Naoyuki Yamada
- Applicant: Yoshiharu Nonoyama , Naoyuki Yamada
- Applicant Address: JP Kariya
- Assignee: DENSO CORPORATION
- Current Assignee: DENSO CORPORATION
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye PC
- Priority: JP2011-082197 20110401
- Main IPC: F02D41/00
- IPC: F02D41/00
Abstract:
An apparatus extracts a main waveform component and a branch waveform component from a pressure waveform detected by a fuel pressure sensor. The main waveform component is caused by pressure change traveling in a main passage. The branch waveform component is caused by pressure change traveling in a branch passage. The apparatus calculates traveling speeds based on the components. Then, the apparatus estimates a main passage temperature based on a detected value of the fuel temperature sensor, the traveling speeds, the fuel pressure waveform and an average pressure.
Public/Granted literature
- US20120253639A1 APPARATUS OF ESTIMATING FUEL STATE Public/Granted day:2012-10-04
Information query
