| 发明名称 | Rail pressure control strategy for common rail fuel system | ||
| 摘要 | A common rail fuel system includes a common rail supplied by an inlet metered high pressure pump and fluidly connected to a plurality of zero-leak fuel injectors. An electronic controller controls pressure in the common rail predominantly responsive to a rail pressure error when outside of an overshoot avoidance condition corresponding to the error being less than a first threshold and a time rate of change of the error being greater than a second threshold. Pressure in the common rail is controlled predominantly responsive to the time rate of change of the error during the overshoot avoidance condition. | ||
| 申请公布号 | US9376977(B2) | 申请公布日期 | 2016.06.28 |
| 申请号 | US201213606479 | 申请日期 | 2012.09.07 |
| 申请人 | Caterpillar Inc. | 发明人 | Methil-Sudhakaran Nandagopal;Puckett Daniel R.;Lombardi Frank |
| 分类号 | F02D41/04;F02D41/14;F02D41/38;F02M59/34;F02M63/02 | 主分类号 | F02D41/04 |
| 代理机构 | Liell & McNeil Attorneys P.C. | 代理人 | Liell & McNeil Attorneys P.C. ;Wappel John P. |
| 主权项 | 1. A method of controlling pressure in a common rail of a fuel common rail system comprising the steps of: determining an error between an actual rail pressure and a target rail pressure; determining a time rate of change of the error; determining an integral of the error; determining, based on the error and the time rate of change of the error, whether the common rail system is in one of an overshoot avoidance condition and a fast response condition, wherein the overshoot avoidance condition is indicated by the error being less than a first threshold and the time rate of change of the error being greater than a second threshold,the fast response condition is indicated by the error being greater than a third threshold and the time rate of change of the error being greater than a forth threshold; supplying fuel to the common rail from an electronically controlled pump; removing fuel from the common rail responsive to injecting fuel from a plurality of fuel injectors; controlling pressure in the common rail predominately responsive to the time rate of change of the error during the overshoot avoidance condition, andpredominantly responsive to the error during the fast response condition, andpredominately responsive to the error and the integral of the error when the common rail system is operating in neither the overshoot avoidance condition nor the fast response condition. | ||
| 地址 | Peoria IL US | ||