公开(公告)号：US20090301067A1

公开(公告)日：2009-12-10

申请号：US12473648

申请日：2009-05-28

Applicant: PHILIP J.G. DINGLE ,  MARTIN PAUL HARDY ,  ROMAN STEFAN ZUELCH

Inventor： PHILIP J.G. DINGLE ,  MARTIN PAUL HARDY ,  ROMAN STEFAN ZUELCH

IPC: F01N9/00 ,  F01N3/00

CPC classification number: F01N3/208 ,  F01N3/021 ,  F01N3/035 ,  F01N3/0807 ,  F01N3/0814 ,  F01N3/0878 ,  F01N3/106 ,  F01N11/00 ,  F01N13/009 ,  F01N13/011 ,  F01N2240/25 ,  F01N2240/36 ,  F01N2250/02 ,  F01N2250/12 ,  F01N2250/14 ,  F01N2260/024 ,  F01N2410/04 ,  F01N2410/12 ,  F01N2560/021 ,  F01N2560/026 ,  F01N2570/14 ,  F01N2610/02 ,  F01N2610/03 ,  F01N2610/1413 ,  F01N2610/1433 ,  F01N2610/146 ,  F01N2900/0412 ,  F01N2900/08 ,  F01N2900/1814 ,  Y02A50/2344 ,  Y02T10/24 ,  Y02T10/47

Abstract: A method of dosing a reagent into an exhaust gas stream of an internal combustion engine having an SCR catalyst, the method comprising injecting reagent from a reagent tank into the exhaust gas stream at a position upstream of the SCR catalyst using a reagent injector in accordance with a first dosing schedule in order to remediate a predetermined proportion of NOx in the exhaust gas stream, the first dosing schedule being associated with a first range of engine operating conditions; and injecting reagent from the reagent tank into the exhaust gas stream at a position upstream of the SCR catalyst using a reagent injector in accordance with a second dosing schedule in order to enable heat transfer between the reagent injector and said injected reagent, the second dosing schedule being associated with a second range of engine operating conditions.Dosing in accordance with said first or said second dosing schedule is carried out in dependence on whether engine operating conditions lie within said first or said second range of engine operating conditions, and the proportion of NOx in the exhaust gas stream which is remediated by dosing using said second dosing schedule is less than said predetermined portion. A reagent dosing system is also provided for dosing a reagent into the exhaust gas stream of an internal combustion engine, comprising a reagent tank for storing a supply of reagent, an injector module comprising an atomising dispenser and a positive-displacement metering pump which draws reagent from the reagent tank and delivers it to the dispenser a supply line coupling the reagent tank to the injector module, and a dosing control unit operable to control the injector module to inject reagent into the exhaust gas stream. A priming pump is provided to urge reagent along the supply line toward the injector module under selected conditions.

Abstract translation: 一种将试剂投入到具有SCR催化剂的内燃机的排气流中的方法，该方法包括使用试剂注射器在SCR催化剂上游的位置将试剂从试剂罐注入到排气流中， 第一给药计划，以便修复废气流中预定比例的NOx，所述第一给药计划与第一范围的发动机操作条件相关联; 以及根据第二给药方案，使用试剂注射器在SCR催化剂的上游位置将试剂从试剂罐注入到排气流中，以便能够使试剂注射器和所述注射的试剂之间的热传递，第二给药方案 与第二范围的发动机操作条件相关联。 根据所述第一或所述第二给药计划的剂量是根据发动机操作条件是否位于所述发动机操作条件的所述第一或所述第二范围内以及排气流中的NOx的比例通过配量使用 所述第二给药方案小于所述预定部分。 还提供了一种试剂计量系统，用于将试剂计量​​到内燃机的废气流中，包括用于储存试剂供应的试剂罐，包括雾化分配器的注射器模块和吸取试剂的正位计量泵 从所述试剂罐输送并将其输送到所述分配器，所述供给管线将所述试剂罐连接到所述注射器模块;以及计量控制单元，其可操作以控制所述注射器模块将试剂注入到所述排气流中。 提供起动泵，以在选定的条件下沿着供应管路朝向注射器模块推动试剂。

公开(公告)号：US20090223487A1

公开(公告)日：2009-09-10

申请号：US12470058

申请日：2009-05-21

Applicant: Philip J.G. Dingle

Inventor： Philip J.G. Dingle

IPC: F02M63/00 ,  F02D41/30

CPC classification number: F02M61/168 ,  F02D41/2467 ,  F02D41/3827 ,  F02D41/40 ,  F02D2041/1433 ,  F02D2200/0602 ,  F02D2200/0604 ,  F02M57/005 ,  F02M2200/21 ,  F02M2200/24 ,  F02M2200/247 ,  F02M2200/8092 ,  Y02T10/44

Abstract: A fuel injector for an internal combustion engine, the fuel injector comprising an injector body, a fuel supply passage defined in the injector body, the fuel supply passage containing fuel under high pressure in use of the injector, a pressure sensor for measuring the pressure of fuel in the passage in use, wherein the pressure sensor is situated within the injector body and is separated from fuel in the passage in use, and a method of fuel injection, comprising constructing an hydraulic behaviour profile by fuel pressure measurement, using the hydraulic behaviour profile to predict fuel pressure that will prevail in a fuel injector during an injection event, and supplying a control signal to the fuel injector to control the amount of fuel injected during the injection event in accordance with the predicted fuel pressure. By predicting the fuel pressure that will prevail during an injection event, the fuel delivered during the injection event can be accurately controlled.

Abstract translation: 一种用于内燃机的燃料喷射器，所述燃料喷射器包括喷射器主体，限定在所述喷射器主体中的燃料供给通道，所述燃料供给通道在所述喷射器的使用中在高压下容纳燃料;压力传感器， 燃料在使用中的通道中，其中压力传感器位于喷射器主体内并与使用中的通道中的燃料分离，以及燃料喷射方法，包括通过燃料压力测量来构造液压行为特性，使用液压行为 以预测在喷射事件期间在燃料喷射器中占优势的燃料压力，以及根据预测的燃料压力向燃料喷射器提供控制信号以控制在喷射事件期间喷射的燃料量。 通过预测在喷射事件期间将占优势的燃料压力，可以精确地控制在喷射事件期间输送的燃料。