Claims:We Claim:
1. A fretting wear detection system (200) on a common rail (205) for a plurality of components of a fuel injection system (100), said fretting wear detection system (200) comprising:
-an electrical interface (210) on a first end of said common rail (205);
-an accelerometer sensor (215) mounted on said electrical interface (210) of said common rail (205); and
-a control module (220) in signal communication with accelerometer sensor (215).
2. A method for detecting fretting wear of a common rail (205) for a fuel injection system (100), said method comprising:
-detecting a fretting wear on an electrical interface (210) on said common rail (205) by an accelerometer sensor (215) mounted on said electrical interface (210);
- monitoring the accelerometer sensor (215) by a control module (220), wherein said control module (220) is in signal communication with said accelerometer sensor (215);
- determining if said particle count is above a set limit by said control module (220);
- generating an error code by said control module (220), if said fretting wear is above said set limit.

, 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] The present disclosure relates to a particle counter system for detecting particle count of fuel entering a fuel pump of a fuel injection system and a method for detecting particle count of fuel in a fuel pump of a fuel injection system.
Background of the invention
[0002] The electrical connectors are an integral part of Common Rail Systems. It interfaces with the Fuel injector components, wiring harness & ECU to seamlessly transmit & receive electrical signals. The vibration amplitudes have a direct co-relation to the fretting wear at the contact Pins interface.

[0003] Common Rail Systems works effectively when the electrical connections are robust throughout the intended useful life. To ensure the same, one of the influencing parameters, the vibration amplitudes for connector interfaces are measured at engine mounted conditions & broadly verified to be within the product limits.

[0004] This eventually results in intermittent electrical contacts, loss of contact/ malfunction of CRS. A typical example is wear of pin of railway pressure sensor. The problem of fretting wear is to be drastically reduced for successful functioning of Common Rail Systems.

[0005] The concept is to eliminate the problem by having an accelerometer sensor at the electrical interface of the common rail of the fuel injection system.

Brief description of the accompanying drawings
[0006] An embodiment of the disclosure is described with reference to the following accompanying drawings,
[0007] Figure 1 illustrates a view of the fuel injection system in accordance with an embodiment of our invention.
Detailed description of the drawings
[0008] Figure 1 illustrates a fuel injection system (100) with one embodiment of our invention (200). The fuel injection system (100) comprises among other things at least a common rail (205), an electrical interface (210) at one end of said common rail (205) and a control module (220).
[0009] Figure 1 also illustrates a view of the fuel injection system (100) with one embodiment of our invention (200). In this embodiment, the electrical interface (205) consists of an accelerometer sensor (215) mounted on it. From the experience of various vehicle, engine endurances & platform trials, a ‘Fretting Wear Base map’ of vibration levels versus severity of fretting wear is established & made available. The Fretting wear Base map also inherently encompasses the aspect of ‘Time domain’ (considering endurance run hours) versus Fretting wear.
[0010] Mapping of (Real time / On Road) Amplitude & Frequency of electrical interface vibrations through usage of said accelerometer sensor (215) is done. The signal output can vary based on driving pattern & Road condition. The accelerometer sensor (215) is integrated for signal interface to control module (220). The control module (220) has in its memory the Fretting wear Base map .The control module (220) continuously maps real time signals from accelerometer sensor (215) to the fretting wear base map. The analyses of the signals indicate the health condition of the electrical interface (210) with regards to Fretting wear.
[0011] Appropriate actions like ensuring proper wiring harness mounting, connector replacement, cleaning, Fuel Injection Equipment service/ replace, can be initiated. A vehicle running in bad road conditions under high vibration amplitudes could automatically trigger a caution to the fleet owner for checking on aspects of electrical connections. Identification of packaging failures/ loose/ improper mounting of electrical interfaces in real time can be done easily. Also, this would initiate fast repair time & cost reduction.
[0012] It must be understood that the embodiments explained in the above detailed description are only illustrative and do not limit the scope of this invention. Any modification to the fuel injection system (100) are envisaged and form a part of this invention. The scope of this invention is limited only by the claims.