FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003
COMPLETE SPECIFICATION
(See Section 10 and Rule 13)
Title of invention:
SYSTEM TO SUPPLY COMPRESSED AIR TO VACUUM BOOSTER
USING TURBOCHARGER OUTPUT PRESSURE
Applicant:
TATA Consultancy Services Limited A company Incorporated in India under The Companies Act, 1956
Having address:
Nirmal Building, 9th Floor,
Nariman Point, Mumbai 400021,
Maharashtra, India
The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF THE INVENTION
The present invention relates to an automotive, more particularly the present invention relates to a system, a method and an apparatus for increased brake and turbocharger efficiency in an automotive.
BACKGROUND OF THE INVENTION
Conventionally braking in a vehicle was achieved by using a hydraulic braking system consisting of the brake pedal, master cylinder and hydraulic brake lines comprising fluid under pressure.
The advancement in engine technology and improved road infrastructure though guarantees a high-speed logistics; there is always a scope for improvement in terms of safety and energy conservation in a vehicle.
Compared to original mechanical systems, power assisted braking systems help the driver to exert a higher couple on a break lever causing increased displacement of a brake pedal. The power assisted braking system use a vacuum booster, in which the negative pressure created from internal combustion engine or a vacuum pump together with atmospheric air used for generating necessary assistive force.
These systems achieve desired function, however, from energy conservation point of view; any improvements will give better energy utilization or higher assistance.
Volkswagen AG in DE 1005011 discloses a method that uses the air compressed by a turbocharger in the working chamber of a vacuum brake booster. The compressed air is supplied through a storage tank having a non-return valve mounted in the supply lines. The disadvantage of this system is that it uses a throttle valve between the turbocharger. the engine, and the storage tank for the compressed air. The use of throttle valve reduces the efficiency of the turbocharger as well as engine, since the supply of the compressed

air to storage tank in not controlled but continuous, therefore reducing the availability of compressed air for the engine.
DE 102007059956 issued to Daimler Chrysler AG discloses a system for reduction of components used in system for example removing the storage tank or reservoir. The disclosure teaches supply of compressed air of turbocharger to a vacuum booster irrespective of the condition or the requirement of the engine during a braking operation. This hampers the efficiency of the turbocharger and thus the whole system.
Thus, there is a need to have:
• a method that increases the efficiency of braking system and turbocharged system.
• a system that detects the non-requirement of compressed air for engine.
• a system adapted to store the excess compressed air produced by a turbocharger.
OBJECTS OF THE INVENTION
The principal object of the present invention is to provide a system for utilizing excess compressed air produced by a turbocharger for increasing the braking efficiency.
Another object of the invention is to provide a system that detects the non-requirement of compressed air for engine.
Yet another object of the invention is to increase the efficiency of braking system and a turbocharged system in a vehicle.
Yet another object of the invention is to provide an apparatus that detects excess compressed air produced by a turbocharger and routes to a reservoir tank.

SUMMARY OF THE INVENTION
Before the present methods and apparatuses are described, it is to be understood that this invention is not limited to the particular apparatus and methodologies described, as there can be multiple possible embodiments of the present invention, which are not expressly illustrated, in the present disclosure. 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 invention, which will be limited only by the appended claims.
In one aspect of the invention, a system is provided comprising of a turbocharger for producing and supplying compressed air to an engine, a controller unit for detecting non-requirement of compressed air by the engine. The system further comprises of a reservoir to store the excess compressed air, a vacuum brake booster system, a distributor valve controlled by the controller unit and a non-return valve mounted on a supply line supplying the excess compressed air to the reservoir tank.
In another aspect of the invention, a method is provided for generating compressed air from turbocharger, supplying compressed air to an engine through a distributor valve, detecting non-requirement of compressed air by the engine by a controller unit, controlling the distributor valve and routing excess air to reservoir tank, storing the excess compressed air in the reservoir tank, and supplying the stored compressed air to a vacuum brake booster system.
In another aspect of the invention, an apparatus is provided comprising of a turbocharger, an engine, a controller unit, a reservoir tank, a vacuum brake booster system, a distributor valve and a non-return valve mounted on a supply line.

BRIEF DESCRIPTION OF DRAWINGS
The foregoing summary, as well as the following detailed description of preferred embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there is shown in the drawings example constructions of the invention; however, the invention is not limited to the specific methods and product disclosed in the drawings:
Figure t illustrates steps involved in a system for supply of compressed air to vacuum booster using turbocharger output pressure according to one exemplary embodiment of the invention.
Figure 2 illustrates the schematic layout of a system for supply of compressed air to vacuum booster using turbocharger output pressure according to one exemplary embodiment of the invention.
DESCRIPTION OF THE INVENTION
Some embodiments of this invention, illustrating its features, will now be discussed:
The words "comprising," "having," "containing," 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.
It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although any systems, methods, apparatuses, and devices similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present invention, the preferred, systems and parts are now described.

The disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms.
Definitions of the Terms:
The term vehicle refer to at least one element that can be selected from the group comprising of motor vehicle, automobile, personal transport vehicle, Automated guided vehicle, or self-propelled machines.
The terms "system," "systems," "components" or "parts" refers to a common term "systems" and essentially mean the same.
The term "turbocharger," "turbo supercharger," "supercharger", "compressor," or "loader" refer to a common term "turbocharger" and essentially mean the same.
The term "compressed air," "charged air," or "pressurized air" refers to a common term 'compressed air" and essentially mean the same.
The term "vacuum brake system," "brake assists system," "vacuum brake booster." "brake booster system," or "power assisted brake system" refer to a common term "brake booster" and essentially mean the same.
A conventional braking system comprises of a master cylinder connected to a hydraulic reservoir containing a fluid, a hydraulic line contain the fluid, connecting the master cylinder with disc brake or brake pads or drum brake located at wheels of the vehicle. The system sometimes consists of tandem cylinder to improve braking and pressure in the hydraulic lines. When a brake pedal is displaced or pressed the master cylinder exerts force on the fluid in the hydraulic line, which in turn exerts pressure on the brake pads, and helps a vehicle come to a halt. The reservoir helps in maintaining the level of fluid in hydraulic line.

To achieve better braking efficiency, a brake booster system was introduced in addition to the conventional braking system. The brake booster is mounted on the firewall directly behind the master cylinder and, is directly connected with the brake pedal. The brake booster system amplifies an available foot pressure applied to the brake pedal so that the amount of the foot pressure required to stop the vehicle is minimal. The brake booster system consists of a canister, wherein the canister has two chambers, vacuum chamber, and working chamber. A vacuum generated from an engine enters the vacuum chamber through a check valve mounted on the canister. The check valve connected to the engine with a rubber hose, acts as a one-way valve that allows vacuum to enter the canister only. A diaphragm separates the vacuum chamber and working chamber in the canister. There is a valve in the diaphragm that remains open while the foot is off the brake pedal so that vacuum is allowed to fill into both the chambers. When one steps on the brake pedal, the valve in the diaphragm closes, separating the two chambers and another valve opens to allow atmospheric air in the working chamber. Due to the pressure difference between the vacuum chamber and working chamber the diaphragm moves towards the master cylinder end exerting pressure on the master cylinder, which then works like conventional brake system. The effort needed is reduced as the movement of diaphragm assist in exerting force on master cylinder.
Figure 1 illustrates the steps involved in a system for supply of compressed air to vacuum booster using turbocharger output pressure according to one exemplary embodiment of the invention. The system for supply of a compressed air to a brake booster (103) routed by a distributor valve comprises of a turbocharger generating the compressed air (101) connected to a first inlet port of the distributor valve for distributing the compressed air. The system consists of a reservoir tank connected to a first outlet port of the distributor valve, for storing the compressed air (104). A controller unit, controlling the distributor valve for regulating a flow of the compressed air to an engine connected to a second outlet port of the distributor valve and to the reservoir tank. wherein the controller unit determines and detects a non-requirement of supply of the compressed air to an engine (102). Supply the stored compressed air to the brake booster (105).

According to one embodiment of the present disclosure as illustrated by Figure 2, a turbocharger (201) is connected to a distributor valve (202) having 3 port 2 opening configuration. The 3 port 2 opening configuration allows for a connection of one inlet port to either or both outlet ports or connection of the two outlets ports. The turbocharger (201) compresses the air received at the atmospheric pressure via a supply line. The compressed air then passes to the distributor valve (202). The distributor valve (202) can be a solenoid-actuated valve. A controller unit (206) mounted in a vehicle, controls the distributor valve (202). The controller unit (206) has a plurality of sensors (207) communicably connected, the plurality of sensors (207) feed the controller unit (206) with data related to. but not restricted to only, an engine temperature, a percentage of Oxygen in the system, an Air/Fuel ratio. Depending upon the input from the plurality of sensors (207) the controller unit (206) determines whether to supply the compressed air to an engine (205) or not. In situations like idling, braking, coasting, or downhill driving of a vehicle the feed received from the plurality of the sensors (207), results in determining by the controller unit (206), of non-requirement of compressed air by the engine (205).
Conventionally, during the non-requirement of compressed air by the engine (205) situation the compressed air would be released to the atmosphere by a bypass valve (Not shown in figure). However, in present disclosure the distributor valve (202) routes the excess compressed air (non-required compressed air for the engine) to a reservoir tank (203) through a non-return valve (208).
The compressed air is stored in the reservoir tank (203). The reservoir tank (203) has a check valve (Not shown in figure) mounted providing the reservoir tank with a supply of air at the atmospheric pressure to balance the level in the reservoir tank (203). When a brake pedal (Not shown in figure) is pressed or displaced, a brake booster (204) comes into action. The compressed air from the reservoir tank (203) flows through supply lines to the working chamber (Not shown in figure) of the brake booster (204).

In another embodiment of the present disclosure, an inter-cooler (Not shown in figure) may be provided in the system in addition to various embodiment discussed above. The inter-cooler (Not shown in figure) could be positioned between the turbocharger and distributor valve, or in an alternate configuration, a first inter-cooler could be mounted between the distributor valve and reservoir tank and a second inter-cooler between distributor valve and engine.
The present disclosure in addition to providing an efficient brake booster system it also provides a fail-safe system in case when the vacuum generated from the engine is not sufficient that is the pressure difference between the vacuum chamber and working chamber is not sufficient. As compressed air is provided to the working chamber in the present disclosure the pressure difference between the vacuum chamber and working chamber is always sufficient.
WORKING EXAMPLE OF THE INVENTION
As illustrated by Figure 2, in one embodiment of the present disclosure a turbocharger (201) is connected to a distributor valve (202). The turbocharger compresses air received at atmospheric pressure via a supply line. The compressed, air then passes to the distributor valve (202). The distributor valve can be a solenoid-actuated valve (Not shown in diagram). A controller unit (206) mounted in a vehicle, controls the distributor valve (202). The controller unit has a plurality of sensors (207) communicably connected, the plurality of sensors feed the controller unit with data related to, but not restricted to only, an engine temperature, a percentage of Oxygen in the system, an Air/Fuel ratio. Depending upon the input from the plurality of sensors (207) the controller unit (206) determines whether to supply the compressed air to an engine (205) or not. When the controller unit has determined the non-requirement of compressed air by the engine (205), the compressed air is routed to a reservoir tank (203) through a non-return valve (208). The compressed air is stored in the reservoir tank (203). When a brake pedal (Not shown in figure) is pressed or displaced, a brake booster (204) comes into action. The

compressed air from the reservoir tank (203) flows through supply lines to the brake booster (204).
ADVANTAGES OF THE INVENTION:
1. Increased efficiency of a system comprising turbocharger.
2. Increase in braking efficiency of a vacuum brake booster.
3. An alternate fail-safe system in situations when vacuum from engine is not available for a vacuum chamber of the brake booster system.

We Claim:
1. A system for supplying compressed air to a brake booster routed by a distributor valve, comprising:
a rurbocharger generating the compressed air connected to a first inlet port of the distributor valve for distributing the compressed air;
a reservoir tank connected to a first outlet port of the distributor valve, for storing the compressed air, further comprising a first non-return valve mounted thereon; and
a controller unit, controlling the distributor valve for regulating a flow of the compressed air to an engine connected to a second outlet port of the distributor valve and to the reservoir tank, wherein the controller unit determines and detects a non-requirement of supply of the compressed air to an engine.
2. The system for supplying the compressed air to the brake booster of claim 1, wherein during each detected non-requirement period of supply of the compressed air to the engine, the controller opens the distributor valve to supply the compressed air to the reservoir tank through a second non-return valve.
3. The system for supplying the compressed air to the brake booster of claim 1, wherein the controller unit receives a feed from a plurality of sensors mounted in a vehicle.
4. The system for supplying the compressed air to the brake booster of claim 1, wherein the distributor valve is a solenoid actuated valve.
5. A method for supplying compressed air to a brake booster routed by a distributor valve, comprising of:
a. compressing air using a turbo-charger;
b. determining a non-requirement of compressed air for supply to an engine
using a controller unit via the distributor valve;

c. routing the compressed air to a reservoir tank for each affirmative non-
requirement of compressed air for supply to an engine;
d. storing the compressed air into the reservoir tank, routing thereof enabled
by opening of the distributor valve through a first non-return valve; and
e. supplying the compressed air to the brake booster in a vehicle for
amplifying effort of driver's brake pedal effort, from the reservoir tank
when required.
6. The method for supplying the compressed air to the brake booster of claim 5, wherein actuation of the distributor valve is achieved by a solenoid actuator.
7. An apparatus for supplying compressed air to a brake booster characterized by use of a turbocharger, wherein the non-required compressed air of the turbocharger is stored in a reservoir tank.
8. The apparatus for supplying the compressed air to the brake booster of claim 7, further comprises a solenoid actuated distributor valve controlled by a controller unit.