发明名称 |
Method of determining throttle flow in a fuel delivery system |
摘要 |
A method of determining throttle flow in a fuel delivery system is disclosed. First, a time-efficient throttle flow data collection method is described. The collection method uses a sonic nozzle flow bench to measure airflow as a function of throttle angle and pressure in a manner analogous to on-engine dynamometer throttle flow characterization. Opening each sonic nozzle combination, then recording throttle downstream pressure and computed nozzle flow allows data to be taken in a fraction of the time normally needed. In conventional methods, the estimated airflow rate as a function of throttle angle differs from the measured airflow rate because the leak area is incorrect. The method of the invention correctly determines the estimated throttle airflow rate by using a low pass filtering technique to adjust the estimated airflow rate to eventually equal the measured airflow rate, particularly at small throttle angles.
|
申请公布号 |
US6591667(B1) |
申请公布日期 |
2003.07.15 |
申请号 |
US20010839437 |
申请日期 |
2001.04.20 |
申请人 |
FORD GLOBAL TECHNOLOGIES, LLC |
发明人 |
KOTWICKI ALLAN J.;PURSIFULL ROSS DYKSTRA |
分类号 |
F02D11/10;F02D41/22;(IPC1-7):G01M19/00 |
主分类号 |
F02D11/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|