Claims:We Claim:
1. A method of enabling regeneration of Diesel particulate filter (DPF) via a fuel injection system, said fuel injection system comprising at least a fuel tank, a high pressure pump, a common rail and an injector, said method comprising:
measuring (100), by a differential pressure sensor the pressure difference across said DPF;

receiving (102), by a control unit said measured pressure difference; and

actuating (104), by said control unit a pressure control valve located on said common rail for enabling fuel flow from said common rail to a dosing injector for DPF regeneration.

2. The method of claim 1, wherein an overflow valve is located in between said pressure control valve and said dosing injector.
, Description:Complete Specification:

The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of the invention
[0001]This invention relates to the field of a diesel particulate filter and regeneration.

Background of the invention
[0002] Regeneration of diesel particulate filter (DPF) is required for efficient removal of soot particles in the exhaust system. DPF regeneration happens with help of fuel being injected into the exhaust with the help of a dosing injector. The injection of fuel is a function of pressure as obtained with the help of differential pressure sensor that is mounted across the diesel particulate filter. A metering unit is located along the exhaust flow path, the function of the metering unit is to allow fuel to flow towards the dosing injector, the fuel being received from a fuel tank. Since the use of DPF is required for meeting emerging emission legislations, for low cost markets the use of metering unit increases the overall cost of the vehicle.

Brief description of the accompanying drawing
[0003] Different modes of the invention are disclosed in detail in the description and illustrated in the accompanying drawing:

[0004]Fig. 1 illustrates a method of enabling regeneration of Diesel particulate filter (DPF) via a fuel injection system.

Detailed description of the embodiments
[0005] Fig. 1 illustrates a method of enabling regeneration of diesel particulate filter (DPF) via a fuel injection system. The fuel injection system comprises at least a fuel tank, a high pressure pump, a common rail and an injector. The method comprises measuring 100 by a differential pressure sensor the pressure difference across the DPF. Receiving 102, by a control unit the measured pressure difference and actuating 104 by the control unit a pressure control valve located on the common rail for enabling fuel flow from the common rail to a dosing injector for DPF regeneration.

[0006]During working, the control unit receives the magnitude of the measured pressure difference as measured by the differential pressure sensor. The differential pressure sensor is mounted on the inlet and outlet path of the diesel particulate filter. Based on this pressure difference the requirement of injecting a fuel for DPF regeneration is decided. In case regeneration is required, the control unit actuates 104 the pressure control valve that is located on the common rail for enabling fuel flow from said common rail to a dosing injector for DPF regeneration. The pressure control valve along with the overflow valve that is located in between the pressure control valve and the dosing injector serves the following function, in case the dosing is required the overflow valve opens a path for the fuel to flow towards the dosing injector and in case there is no requirement for dosing, the overflow valve opens the path for fuel to flow from the common rail into the fuel tank.

[0007]With the use of the above mentioned method it is now possible for the fuel to flow from the common rail into the dosing injector without the use of metering unit thereby saving cost.

[0008] ‘Adapted’ or ‘arranged’, in the context of the instant disclosure, refers to the technical capability or the technical capacity of a component, in relation to which the term ‘adapted’ or ‘arranged’ is used, to carry out or executed a specified action or actions, upon the requirement of the specified action or actions to be carried out or executed. Moreover, the usage of the term ‘adapted’ or ‘arranged’ here, is in reference with the normal technical capability or technical capacity of the component, imparted by the design or the structure or the composition of the component, and not in reference with any special or extraneous capability or capacity, beyond the scope of the normal technical capability or technical capacity. Therefore there is a need to address this problem.

[0009]It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention in terms of the type of common rail or DPF used. Many such embodiments and other modifications and changes in the embodiment explained in the description are envisaged. The scope of the invention is only limited by the scope of the claims.