DESC:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
WHEEL SPIN CONTROL SYSTEM FOR VEHICLE

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having Address As:
BEML Soudha, 23/1, 4th Main,
Sampangirama Nagar, Bengaluru - 560 027,
Karnataka, India

The following specification particularly describes the invention and the manner in which it is to be performed.
CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
[001] The present invention claims priority from Indian patent application numbered IN 202241054533 filed on 23rd September, 2022.

FIELD OF INVENTION
[002] The present subject matter described herein, in general, relates to wheel spin control system of a vehicle and more specifically relates to wheel spin control system based on rear wheel and transmission output speed.

BACKGROUND OF THE INVENTION
[003] On slippery roads, increasing the engine output especially of, an unloaded or partially loaded vehicle (acceleration) results in slightly exceeding the maximum frictional connection on one or all driving wheels and in wheel-spin. So just like locking wheels during braking, spinning wheels are also a danger for safety while moving, or increasing the speed of the vehicle. Spinning wheels transmit less cornering forces as compared to blocking wheels. They no longer transmit any propulsive thrust either on the lane. As a result vehicles come to a standstill or even beak down and vehicles are no longer controllable which jackknife on slopes or swerve while cornering.
[004] Presently, vehicles are provided with rear wheel drive with conventional differential which is mechanical type without any electronic controls. One or both of rear wheel start spinning while vehicle is travelling in loose soil, wet road and during the cornering and driver applies brakes to control the same. The application of brake leads to accidents and equipment will become uncontrollable. The wheel spinning is observed in vehicles on muddy surfaces. Also, the wheel spinning is observed at mine sites due to sprinkling of water to suppress the dust at loading/unloading area and also during rainy season. The wheel spin control system helps driver to control the vehicle under the above said condition and it will avoid accidents. Wheel spin control system is developed to improve traction in low traction road conditions. Also reduce the potential of jackknifing caused by excessive wheel spin during acceleration or in curves. Presently available system is mechanical based differential system and this can cause all the torque to be directed to one axle shaft resulting in overload and potential failure. Also, it may affect on the reliability of system due to frequent actuation.
[005] Thus, as an alternative solution has been developed to control the wheel spin of the vehicle.

OBJECTS OF THE INVENTION
[006] Main object of the present invention is to provide a wheel spin control system for a vehicle.
[007] Another object of the present invention is to provide a wheel spin control system for a vehicle based on rear wheel and transmission output speed.
[008] Yet another object of the present invention is to provide braking to spinning wheel and accelerate the opposite wheel.
[009] Yet another object of the present invention is to provide an electronic wheel spin control system.

SUMMARY OF THE INVENTION
[0010] Before the present system is described, it is to be understood that this application is not limited to the particular machine or an apparatus, and methodologies described, as there can be multiple possible embodiments that are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only, and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to wheel spin control system for vehicle, and the aspects are further elaborated below in the detailed description. This summary is not intended to identify essential features of the proposed subject matter nor is it intended for use in determining or limiting the scope of the proposed subject matter.
[0011] The present subject matter described herein, in general, relates to wheel spin control system of a vehicle and more specifically relates to wheel spin control system based on rear wheel and transmission output speed. An ECU compares both the speed and based on that provides signal to a solenoid valve to apply brakes to the spinning wheel. The braking of the spinning wheel provides torque to the opposite wheel thus controlling the wheel spin and moving the vehicle.

STATEMENT OF INVENTION
[0012] Accordingly the present invention discloses a wheel spin control system for vehicle comprising at least one first valve configured to provide oil for braking of the spinning wheel(s), at least one second valve configured to block oil for the braking system of the non-spinning wheel(s), at least one indicator lamp configured to provide visual alert of the wheel spin to the driver; and an electronic control unit (ECU) configured to detect and control the wheel spin of the drive wheels based on the inputs received from the transmission output shaft speed and the drive wheel wherein the ECU is configured to reduce the speed of the spinning wheel(s) by gradually applying brakes and to provide torque and motion to the non-spinning wheel (s).
[0013] The present invention also discloses that the ECU on detection of wheel spin is configured to provide a signal to the valve of the spinning wheel(s) to gradually apply brakes to the spinning wheel(s). The ECU on detection of wheel spin is configured to provide a signal to the inlet of the said valve of the non-spinning wheel(s) to block oil from entering the brakes on the non-spinning wheel(s) of the vehicle. The system is configured with differential braking to transfer torque from the spinning wheel(s) to the non-spinning wheel(s). The ECU is configured to continuously monitor the engine RPM and provide signal to drive proportional to actuate the rear brake gradually to control the over speeding of power line aggregates system on detection of engine RPM exceeding above a predefined limit

BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The foregoing summary, as well as the following detailed description of embodiments, is better understood when read in conjunction with the appended drawing. For the purpose of illustrating the disclosure, there is shown in the present document example constructions of the disclosure, however, the disclosure is not limited to the specific methods and apparatus disclosed in the document and the drawing:
[0015] The detailed description is described with reference to the accompanying figure. In the figure, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawing to refer like features and components.
[0016] Figure 1 illustrates a block diagram of the wheel spin control system.
[0017] Figure 2 illustrates a flow chart of the method of the wheel spin control system.
[0018] The figure depicts various embodiments of the present disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION OF THE INVENTION
[0019] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising", “having”, and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. Although any systems and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, systems and methods are now described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0020] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments illustrated, but is to be accorded the widest scope consistent with the principles and features described herein.
[0021] The present subject matter relates to wheel spin control system, to be specific to a wheel spin control system for a vehicle based on rear wheel and transmission output speed. The electronic based unit is more reliable system and additional safety features are inbuilt as compared to mechanical system. Various systems are available in the market for wheel spin controls and these systems are based on front and rear wheel speed and systems are based on regular on/off solenoid valve.
[0022] To determine the spinning of wheel, ECU compares the speed of the drive wheels with transmission output shaft speed. If the speed of drive wheels on one or both sides are spinning faster than the transmission output shaft speed, the ECU sends signal to proportional solenoid to apply brake gradually to the spinning wheel. At the same time, the ECU will light the spinning indicator lamp provided on the dashboard to indicate the condition to the driver. The appropriate modulator valve then controls braking on the spinning wheel(s). The inlet solenoid of the modulator valve for the opposite side is activated by the ECU to block oil from entering the brakes on the non-spinning side of the vehicle. The braking of drive wheel(s) on one side of the vehicle transfers torque to the wheel(s) on the opposite side. This process is called differential braking. Differential braking is the primary control function when drive wheels are operating on different surfaces (one wheel on loose soil, the other wheel on dry pavement). This system is integrated with engine RPM control. The ECU continuously monitor the engine speed and once it crosses the preset RPM, the controller will send signal to drive proportional (Traction control valve ) which in turn actuates the rear brake gradually to control the over speeding of power line aggregates.
[0023] The present invention provides more safety features, better operator more redundancy higher reliability compared to existing technology. Because present invention continuously monitor the wheel speed and tire road interface condition which more accurate in terms of brake actuation. The Transmission output shaft speed is more accurate compared to from wheel speed, since front wheel speed may vary depending on various conditions.
[0024] A wheel spin control system for vehicle comprising at least one first valve configured to provide oil for braking of the spinning wheel(s), at least one second valve configured to block oil for the braking system of the non-spinning wheel(s), at least one indicator lamp configured to provide visual alert of the wheel spin to the driver; and an electronic control unit (ECU) configured to detect and control the wheel spin of the drive wheels based on the inputs received from the transmission output shaft speed and the drive wheel wherein the ECU is configured to reduce the speed of the spinning wheel(s) by gradually applying brakes and to provide torque and motion to the non-spinning wheel (s).
[0025] The ECU on detection of wheel spin is configured to provide a signal to the valve of the spinning wheel(s) to gradually apply brakes to the spinning wheel(s). The ECU on detection of wheel spin is configured to provide a signal to the inlet of the said valve of the non-spinning wheel(s) to block oil from entering the brakes on the non-spinning wheel(s) of the vehicle. The system is configured with differential braking to transfer torque from the spinning wheel(s) to the non-spinning wheel(s). The ECU is configured to continuously monitor the engine RPM and provide signal to drive proportional to actuate the rear brake gradually to control the over speeding of power line aggregates system on detection of engine RPM exceeding above a predefined limit.
[0026] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[0027] Some embodiment of the present subject matter provides a wheel spin control system for a vehicle.
[0028] Some embodiment of the present subject matter provides a wheel spin control system for a vehicle based on rear wheel and transmission output speed.
[0029] Some embodiment of the present subject matter provides braking to spinning wheel and accelerate the opposite wheel.
[0030] Some embodiment of the present subject matter provides an electronic wheel spin control system.
,CLAIMS:
1. A wheel spin control system for vehicle comprising:
at least one first valve configured to provide oil for braking of the spinning wheel(s);
at least one second valve configured to block oil for the braking system of the non-spinning wheel(s);
at least one indicator lamp configured to provide visual alert of the wheel spin to the driver; and
an electronic control unit (ECU) configured to detect and control the wheel spin of the drive wheels based on the inputs received from the transmission output shaft speed and the drive wheel;
wherein the ECU is configured to reduce the speed of the spinning wheel(s) by gradually applying brakes and to provide torque and motion to the non-spinning wheel (s).

2. The wheel spin control system for vehicle as claimed in claim 1 wherein, said ECU on detection of wheel spin is configured to provide a signal to the valve of the spinning wheel(s) to gradually apply brakes to the spinning wheel(s).

3. The wheel spin control system for vehicle as claimed in claim 1 wherein, said ECU on detection of wheel spin is configured to provide a signal to the inlet of the said valve of the non-spinning wheel(s) to block oil from entering the brakes on the non-spinning wheel(s) of the vehicle.

4. The wheel spin control system for vehicle as claimed in claim 1 wherein, said system is configured with differential braking to transfer torque from the spinning wheel(s) to the non-spinning wheel(s).

5. The wheel spin control system for vehicle as claimed in claim 1 wherein, said ECU is configured to continuously monitor the engine RPM and provide signal to drive proportional to actuate the rear brake gradually to control the over speeding of power line aggregates system on detection of engine RPM exceeding above a predefined limit.