DESC:[001] The present disclosure generally relates to a smart dual-stage battery isolator for commercial vehicles. The smart dual-stage battery isolator for commercial vehicles comprises an induction of 300s in between the disruption of power in the electrical network of the vehicle allows for successful completion of the post-shutdown procedures.
[002] Presently as per latest norms in commercial vehicle safety standards, there is a necessity to install a remote battery isolator switch in the vehicle cabin at proximity to the driver. The switch, on engagement signals the isolator to disconnect the vehicle battery from the vehicular electrical network, thereby powering down all system instantaneously. As a result, post shutdown procedures such as latching of data acquired by the EMS and purging of the urea dosing system are crucial for the prolonged functional operation of the vehicle. The instantaneous shutdown by the isolation relay used prior, instantly disrupted power from these systems, preventing the completion of the post shut procedures, which later result in operational and diagnostic failures.
[003] Further as per habits observed in drivers, there is always an inclination towards using the remote isolation switch immediately after completing a drive, thereby disrupting the completion of post shutdown procedures. While this prevents the successful completion of post shutdown procedures, an immediate shutdown is compulsory in emergency situations. This problem of prior art can be illustrated by FIG .1 , as follows:
[004] Action: After completion of a drive, the driver engages the remote isolator switch immediately post ignition switch-off. Instantaneous power supply cut-off from the vehicle electrical system,
[005] Result: EMS system unable to save data acquired during the drive and on next power-up cycle display and broadcasts old, saved data. EATS system unable to purge urea line resulting in crystallization, reducing efficiency and disrupting operations in the emission after-treatment system
[006] Hence a modification in wiring harness can be made to accommodate the EMS and EATS functionality post cutoff, major changers are required in the wiring harness which increases integration time and costs significantly. Further part variety reduction is crucial, and a single point of cross compatible modification is required to solve the aforementioned problems, while being cost effective and adaptable.
[007] The present subject matter solves the aforementioned and other problems by providing an induction of 300s in between the disruption of power in the electrical network of the vehicle allows for successful completion of the post-shutdown procedures. In the present disclosure the ideology of a smart dual battery isolator has been described, which operates with an additional delay to incorporate the EMS latching and urea system purging time. While having similar fitment and design attributes to isolators used prior, this system has the added benefit of inducing a delay between the human initiated shutdown and the actual shutdown along with the provision for an instantaneous shutdown in the unlikely case of emergencies, thus justifying the dual-stage operation.
[008] This present subject matter can be illustrated by FIG .2, as follows:
[009] (Stage 1 Operation)
[0010] Action: After completion of a drive, the driver engages the remote isolator switch immediately post ignition switch-off. The dual stage isolator supplies power to the EMS and the EATS controllers for additional 300s.
[0011] Result: EMS is able to append the data and the EATS unit is able to purge the after-treatment system, ready for next use.
[0012] (Stage 2 Operation)
[0013] Action: Emergency situation, immediate shutdown is required. Driver initiates the instant shutdown button on the dual stage isolator causing immediate withdraw of power from the vehicular electrical system.
[0014] FIGs 3 to Fig. 5. Illustrate the Dual Stage Isolator consists of two components i.e. the Controller Unit and the Isolator Unit. Within the Controller Unit a power conditioner circuit, responsible for filtering voltage spikes and reducing the vehicle 12V to 5V trough DC-DC buck converter is present. The 5V is a crucial requirement for the operation of the microcontroller of the circuit. Within the microcontroller the delay and emergency algorithm is stored. Two switches are connected with the controller feeding an active low signal on triggering of either cabin cutoff switch or emergency switch.

[0015] During Normal Operation: When remote cabin cut-off switch is pressed the microcontroller receives the signal and waits for present 300s delay period before signaling the output driver circuit responsible for driving the isolator unit. On receiving the shutdown command post 300s the driver circuit de-energizes the isolator coil thereby isolating the battery from the vehicle electrical system.

[0016] During Emergency Situation: The emergency switch is directly pressed and the microcontroller on receiving the emergency shut-down request signals the output driver to immediately de-energize the isolator to galvanically isolate the vehicle electrical system from the battery.

[0017] The uniqueness of the present system lies in the fact that the system requires no additional wiring and is a direct fit, in place of the existing isolator allowing easier retro fitment capabilities and backward compatibility.

[0018] The system of present invention is a dual stage operation single unit device, which improved safety and functionality of the device by backward and cross-compatible. Hence it is cost saving system with no modification in existing harness with direct fitment.

[0019] The direct fitment system of present invention does not require additional wiring and follows standard installation procedures as of ordinary remote battery isolator. Further it allows power to be supplied to the required ancillaries for the required duration before complete shutdown and then instantaneously shutdown is only initiated when required by the user in the unlikely event of an emergency.

[0020] It is cost effective system, which may be compactible across all vehicle range with backward compatibility, using direct fitment and no wiring modification. As the single part modification does not require wiring or fitment change. Hence It is solid-state system with reliable and repeatable operation every time.

[0021] The addition of an active electronic delay timer to a conventional battery isolator which allows smart delayed shutdown in regular operations in the interest of latching EMS data and purging of urea dosing unit, as well initiate conventional instantaneous shutdown in the unlikely event of an emergency. It allows power to be supplied to the required ancillaries for the required duration before complete shutdown and then instantaneously shutdown is only initiated when required by the user in the unlikely event of an emergency.

[0022] Further the approach utilizes the same fitment procedures as a conventional battery isolator requiring no additional wiring modifications.

[0023] Although the present disclosure is described in terms of certain preferred embodiments and examples, other embodiments and examples will be apparent to those of ordinary skill in the art, given the benefit of this disclosure, including embodiments and examples that do not provide all of the benefits and features set forth herein, which are also within the scope of this disclosure. It is to be understood that other embodiments may be utilized, without departing from the true spirit and scope of the present invention.

[0024] It is to be understood that other embodiments of the present disclosure will become readily apparent to those skilled in the art from the following detailed description, wherein it is shown and described only various embodiments of the disclosure by way of illustration. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

[0025] It would become abundantly clear to a person in the art, after reading this specification that the present subject matter also provides a smart dual-stage battery isolator for commercial vehicles comprising an induction of 300s in between the disruption of power in the electrical network of the vehicle allows for successful completion of the post-shutdown procedures effectively and without departing from the spirit of the present subject matter. While the subject matter may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and have been described herein. Alternate embodiments or modifications may be practiced without departing from the spirit of the present subject matter. The drawings shown are schematic drawings and may not be to the scale. While the drawings show some features of the subject matter, some features may be omitted. Alternatively, in some other cases some features may be emphasized while others are not. Further, the methods disclosed herein may be performed in manner and/or order in which the methods are explained. Alternatively, the methods may be performed in manner or order different than what is explained without departing from the spirit of the present subject matter. It should be understood that the subject matter is not intended to be limited to the particular forms disclosed. Rather, the subject matter is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the subject matter.

Yours Faithfully

ANIL KUMAR PANDEY
(IN P/A 2359)
AGENT FOR THE APPLICANT(S)

,CLAIMS:We claim:

1) A smart dual-stage battery isolator for commercial vehicles comprising an induction of 300s in between the disruption of power in the electrical network of the vehicle allows for successful completion of the post-shutdown procedures.
2) The smart dual-stage battery isolator for commercial vehicles as claimed in Claim 1, wherein said system does not require additional wiring and is a direct fit, in place of the existing isolator allowing easier retro fitment capabilities and backward compatibility.
3) The smart dual-stage battery isolator for commercial vehicles as claimed in Claim 1, wherein said system is a dual stage operation single unit device, which improved safety and functionality of the device by backward and cross-compatible. Hence it is cost saving system with no modification in existing harness with direct fitment.

.

Yours Faithfully

ANIL KUMAR PANDEY
(IN P/A 2359)
AGENT FOR THE APPLICANT(S)