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 is related to a device for resetting of at least one DPF parameter in a vehicle.

Background of the invention

[0002]Every component has a useful life and due to misuse/ damage it might also be shortened. Similar is the case with DPF, once it’s loaded 100% with ash or it gets damaged due to any complication it will need to be replaced. As issue seen commonly is due to production tolerance, delta pressure across DPF and back pressure in the system are not at mean expected value. This can sometimes cause unintended emissions or model miss calculations. Currently when a vehicle comes to service station to have diesel particulate filter (DPF) replaced, the service technician must connect the tester tool to update original equipment manufacturers (OEM) Internal functions that a new DPF has been added. The protocol does not update the filter properties in the system to accommodate the impact of production tolerance of DPF on the soot models.

[0003] A patent US11213773 discloses Systems and methods for determining whether an authorized or genuine filter element is installed in a filtration system are described. The authorized filter determination may be based on radio frequency identification (“RFID”) technology. RFID readers with antennas in the monitored filter systems read the RFID tag information from the installed filter elements and feed any detected information into the filter monitoring system. The filter monitoring system or a remote diagnostic system analyzes the returned data (or absence thereof) to determine if a genuine (i.e., authorized, OEM approved, etc.) filter element is installed or not.

Brief description of the accompanying drawings
[0004] Figure 1 illustrates a device in a vehicle in accordance with an embodiment of the invention; and
[0005] Figure 2 illustrates a flowchart of a method of a device for resetting at least one DPF parameter in the vehicle in accordance with this invention.

Detailed description of the embodiments
[0006] Figure 1 illustrates a device in a vehicle in accordance with an embodiment of the invention. The device 10 resets of at least one DPF parameter in a vehicle 12. The vehicle 12 comprises a diesel particulate filter (DPF) 14 positioned in an exhaust path of the vehicle 12. The device 10 comprises a receiver 16 receives a unique identification code when the device 10 activates a radio frequency identification (RFID) tag 18 of the DPF 14 in the vehicle 12 via a radio signal. The device 10 resets at least one DPF parameter automatically, upon detecting a new DPF 14 positioned in the vehicle 12 based on the received radio signal.

[0007] Further the working of the device and the component of the device is explained in detail. The vehicle 12 comprising the DPF 14 , will check the operating state of the DPF 14 every time when the vehicle 12 is started. The device 10 according to one embodiment of the invention is a vehicle 12 electronic control unit. However, it is to be understood that the device 10 can be chosen from a group of devices comprising a microcontroller, a microprocessor, a digital circuit, an integrated chip, and the like. The device 10 comprises the receiver 16 and a transmitter 20 for receiving and transmitting radio signals to the RFID tag 18 , every time the vehicle 12 is started. The radio signal comprises the unique identification code transmitted from the DPF 14 to the transmitter 20 of the device 10. Upon every start of the vehicle 12, the device 10 receives the unique identification code from the RFID tag 18 of DPF 14.

[0008] According to one embodiment of the invention, a Bluetooth tag (not shown) is placed on the DPF 14 for communicating with the device 10. A Bluetooth connection will be established by transmitting the signals at every start time of the vehicle 12. The device 10 upon establishing the communication will check for the operating state of the vehicle 12. However, it is to be understood for a person skilled in the art, the type of identification tag 18 is not restricted to radio-frequency identification tag, a Bluetooth tag, but can be of any other type that is known in the state of the art. The identification tag 18 is positioned on an outer surface of the DPF 14. According to one embodiment of the invention, the identification tag 18 is secured in a heat-resistant material for withstanding the exhaust gas temperatures around the DPF 14.

[0009] Figure 2 illustrates a flowchart of a method of a device for resetting at least one DPF parameter in the vehicle in accordance with this invention. In step S1, an operating state of a diesel particulate filter (DPF) 14 is detected at every start of the vehicle 12. In step S2, a radio frequency identification (RFID) tag 18 of the DPF 14 is activated by transmitting a radio signal from the device 10. In step S3, an activation state of the RFID tag of the DPF 14 is detected upon receiving a unique identification code from the DPF 14. In step S4, a replacement /new DPF 14 is detected upon comparing the received unique identification code with a previous received code. In step S5, the at least one DPF parameter had been reset when a new/replacement of current DPF 14 has occurred in the vehicle 12.

[0010] The method is explained in detail. For every start of the vehicle 12, the device 10 checks for the operating state of the DPF 14 located in the exhaust path. The device 10 activates the DPF identification tag 18 upon transmitting a radio signal from the transmitter of the device 10. This radio signal activates the DPF identification tag 18, wherein a unique identification code is generated. The generated unique identification code is transmitted back to the device 10 from the identification tag 18 of the DPF 14. The device 10 upon receiving the identification code from the identification tag 18 of the DPF 14 via the receiver 16, compares the received code with the previously stored code (i.e.., stored in the memory 22 of the device 12).

[0011] If the received code is matched with the previously stored code, then the device 10 determines that, the DPF 14 has not changed, and no replacement has been happened. If the received code is not matched with the previously stored code, then the device 10 determines a replacement of the DPF 14 or the presence of the new DPF 14 in the vehicle 12. Upon determining the new DPF 14 in the vehicle 12, the device 10 resets/automatically corrects the DPF parameters in the vehicle 12 to the base values for efficient working of the DPF 14. For instance, the device 10 resets/automatically corrects the delta pressure across the DPF 14, back pressure in the vehicle 10, tolerance values, when the unique identification codes doesn’t match.

[0012] With the above disclosed device, the DPF parameters are automatically corrected without any manual intervention. This provides a low-cost effective solution. The device uses the available/existing components for detecting the replacement/new DPF 14 in the vehicle 12.

[0013] It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention. 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.
, Claims:We Claim:
1. A device (10) for resetting at least one DPF parameter in a vehicle (12), said vehicle (12) comprising a diesel particulate filter (DPF) (14) positioned in an exhaust path of said vehicle (12);
Characterized in that :
said device (10) comprising :
-a receiver (16) adapted to receive a unique identification code when said device activates a radio frequency identification (RFID) tag (18) of said DPF (14) in said vehicle (12) via a radio signal;
said device (10) adapted to reset at least one DPF parameter automatically, upon detecting a new DPF (14) positioned in said vehicle (12) based on said received radio signal.

2. The device (10) as claimed in claim 1, wherein said radio signal comprises said unique identification code transmitted from said DPF (14) to a transmitter (20) of said device (10).

3. The device (10) as claimed in claim 1, wherein upon every start of said vehicle (12) , said device (10) receives said unique identification code from said DPF (14).

4. The device (10) as claimed in claim 3, wherein said device (10) detects a replacement of said current DPF (14) based on said received unique identification code.

5. The device (10) as claimed in claim 4, wherein said device (10) resets/ automatically corrects said at least one DPF parameter upon detection of new DPF /replacement of said current DPF (14).
6. The device (10) as claimed in claim 1, wherein said device (10) is chosen from a group of comprising a microcontroller, a microprocessor, a digital circuit, an integrated chip.

7. The device (10) as claimed in claim 1, wherein said device (10) detects a replacement /new said DPF (14) in said vehicle (12) based on a Bluetooth tag.

8. A method of resetting at least one DPF parameter in a vehicle (12) by a device(10), said method comprising :
- detecting an operating state of a diesel particulate filter (DPF) (14) at every start of said vehicle (12);
Characterized in that :
- activating a radio frequency identification (RFID) tag (18) of said DPF (14) by transmitting a radio signal from said device (10);
- detecting an activation state of said RFID tag (18) of said DPF (14) upon receiving a unique identification code from said DPF (14) ;
- detecting a replacement /new said DPF (14) upon comparing said received unique identification code with a previous received code;
- resetting said at least one DPF parameter when a new/replacement of current said DPF (14) has occurred in said vehicle (12).