DESC:FIELD
The present disclosure generally relates to the field of turbocharging systems of an automobile engine.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
An engine turbocharging assembly receives exhaust gas from the engine and with the help of the velocity of flow of the exhaust gas, increases the boost pressure and power of the engine.
A conventional standalone turbocharger assembly includes a turbine, and a bypass channel and a waste gate valve for diverting the flow of the exhaust gas to the turbine. The bypass channel is connected to the engine exhaust manifold with the help of boss and gaskets, which makes the assembly heavy and costly, and may further lead to exhaust gas leakage. More specifically, the conventional assembly fails to accurately control and regulate the waste gas in dynamic conditions through the waste gate valve resulting in a subpar performance of the assembly.
There is, therefore, felt a need for an arrangement for optimizing the performance of the turbocharging assembly.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
It is an object of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
An object of the present disclosure is to provide an engine turbocharging system.
Another object of the present disclosure is to provide a simplified system for accurately controlling and regulating the exhaust gas passing over to the turbine of the turbocharging system.
Yet another object of the present disclosure is to provide a system which provides a high efficiency.
Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure envisages an engine turbocharging system. The system is integrated with an engine exhaust manifold, and comprises a turbocharger, a bypass channel, a waste gate valve, and a control unit. The turbocharger comprises a compressor configured to supply compressed air to the engine, and a turbine connected to the compressor. The turbine is configured to be rotated for producing energy to drive the compressor. The bypass channel is connected to the exhaust manifold for receiving a high velocity exhaust gas flow from the exhaust manifold. The bypass channel is configured to diverge from the exhaust manifold at a position upstream of the turbine to allow the exhaust gas flow to bypass the turbine to facilitate rotation of the turbine. The waste gate valve is positioned at an upstream end of the bypass channel. The waste gate valve is configured to be selectively opened or closed to control the exhaust gas flow through the bypass channel for regulating the speed of rotation of the turbine. The control unit is coupled to the waste gate valve. The control unit is configured to control extent of opening of the waste gate valve based on change in the pressure of the exhaust gas at the inlet of the bypass channel.
In an embodiment, the system includes a sensor positioned upstream of the bypass channel. The sensor is configured to sense the pressure of the exhaust gas flow at the inlet of the bypass channel, and is further configured to generate a sensed value.
In another embodiment, the control unit includes a memory and a processor. The memory is configured to store a predetermined value of pressure corresponding to the pressure of the exhaust gas. The processor is coupled to the sensor and the memory. The processor is configured to receive the sensed value, and compare the sensed value with the stored value to generate a wastegate valve actuating signal based on the compared value.
In yet another embodiment, the system includes an actuator coupled to the control unit and connected to the waste gate valve. The actuator is configured to receive the wastegate valve actuating signal, and is further configured to control the extent of opening of the waste gate valve based on the wastegate valve actuating signal.
In one embodiment, the waste gate valve is a flap valve.
In another embodiment, the actuator is a push rod actuator.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWING
An engine turbocharging system, of the present disclosure will now be described with the help of the accompanying drawing, in which:
Figure 1 illustrates an isometric view of a turbocharger depicting an electronic actuator of the present disclosure;
Figure 2 illustrates a front view of the turbocharger of the Figure 1;
Figure 3 illustrates a rear view of the turbocharger of the Figure 1; and
Figure 4 illustrates a side view of the turbocharger of the Figure 1.
LIST OF REFERENCE NUMERALS USED IN DETAILED DESCRIPTION AND DRAWING
100 – System
105 – Actuator
110 – exhaust manifold
115 – bypass channel
120 – turbine housing
125 – compressor housing
DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a,” "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms "comprises," "comprising," “including,” and “having,” are open ended transitional phrases and therefore specify the presence of stated features, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, elements, components, and/or groups thereof.
When an element is referred to as being "mounted on," “engaged to,” "connected to," or "coupled to" another element, it may be directly on, engaged, connected or coupled to the other element. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed elements.
The present disclosure envisages an engine turbocharging system 100. The system 100 is integrated with an engine exhaust manifold 110, and comprises a turbocharger, a bypass channel 115, a waste gate valve, and a control unit. The turbocharger comprises a compressor configured to supply compressed air to the engine, and a turbine connected to the compressor. The turbine is housed in a turbine housing 120, and is configured to be rotated for producing energy to drive the compressor. The compressor is housed in a compressor housing 125. The bypass channel 115 is connected to the exhaust manifold 110 for receiving a high velocity exhaust gas flow from the exhaust manifold 110. The bypass channel 115 is configured to diverge from the exhaust manifold 110 at a position upstream of the turbine to allow the exhaust gas flow to bypass the turbine to facilitate rotation of the turbine. The waste gate valve is positioned at an upstream end of the bypass channel 115. The waste gate valve is configured to be selectively opened or closed to control the exhaust gas flow through the bypass channel 115 for regulating the speed of rotation of the turbine. The control unit is coupled to the waste gate valve. The control unit is configured to control extent of opening of the waste gate valve based on change in pressure of exhaust gas at the inlet of the bypass channel 115. More specifically, the combination of boost pressure detected by the sensor and the actuation mechanism provided with the turbocharger helps in controlling the exhaust gas flow onto the turbine. Additionally, the mechanical effort sensed by an accelerator pedal sensor of the vehicle is contributes in controlling the extent of opening of the waste gas valve.
In an embodiment, the system 100 includes a sensor positioned upstream of the compressor. The sensor is configured to sense the pressure of the intake charge after intercooler based on the performance requirement of the vehicle.
In another embodiment, the control unit includes a memory and a processor. The memory is configured to store a predetermined value of pressure corresponding to the pressure of the exhaust gas. The processor is coupled to the sensor and the memory. The processor is configured to receive the sensed value, and compare the sensed value with the stored value to generate a wastegate valve actuating signal based on the compared value.
In yet another embodiment, the system 100 includes an actuator 105 coupled to the control unit and connected to the waste gate valve. The actuator 105 is configured to receive the wastegate valve actuating signal, and is further configured to control the extent of opening of the waste gate valve based on the wastegate valve actuating signal.
In one embodiment, the waste gate valve is a flap valve.
In another embodiment, the actuator 105 is a push rod actuator.
The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of an embodiment are generally not limited to that embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are within the scope of the present disclosure.
TECHNICAL ADVANCES AND ECONOMICAL SIGNIFICANCE
The present disclosure described herein above has several technical advantages including, but not limited to, the realization of an engine turbocharging system, that:
• accurately controls and regulates the passage of by-pass gas via waste gate valves;
• has a simple configuration;
• provides ease of operation; and
• has increased efficiency.
The foregoing description of the specific embodiments so fully reveals the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, or group of elements, but not the exclusion of any other element, or group of elements.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.

,CLAIMS:
WE CLAIM:
1. An engine turbocharging system 100, said system 100 integrated with an engine exhaust manifold (110), and comprising:
• a turbocharger, said turbocharger comprising a compressor configured to supply compressed air to said engine and a turbine connected to said compressor, said turbine configured to be rotated for producing energy to drive said compressor;
• a bypass channel (115) connected to said exhaust manifold (110) for receiving a high velocity exhaust gas flow from said exhaust manifold (110), said bypass channel (115) configured to diverge from said exhaust manifold (110) at a position upstream of said turbine to allow the exhaust gas flow to bypass said turbine to facilitate rotation of said turbine;
• a waste gate valve positioned at an upstream end of said bypass channel (115), said waste gate valve configured to be selectively opened or closed to control the exhaust gas flow through said bypass channel (115) for regulating the speed of rotation of said turbine; and
• a control unit coupled to said waste gate valve, said control unit configured to control extent of opening of said waste gate valve based on change in pressure of the exhaust gas at the inlet of said bypass channel (115).
2. The system 100 as claimed in claim 1, which includes a sensor positioned upstream of the compressor, said sensor configured to sense the pressure of exhaust gas at the inlet of said bypass channel (115). and further configured to generate a sensed value
3. The system 100 as claimed in claim 1, wherein said control unit includes:
o a memory configured to store a predetermined value of pressure corresponding to the pressure of the exhaust gas;
o a processor coupled to said sensor and said memory, said processor configured to receive said sensed value, and compare said sensed value with said stored value to generate a wastegate valve actuating signal based on said compared value.
4. The system 100 as claimed in claim 1, which includes an actuator 105 coupled to said control unit and connected to said waste gate valve, said actuator 105 configured to receive said wastegate valve actuating signal, and further configured to control the extent of opening of said waste gate valve based on said wastegate valve actuating signal.
5. The exhaust gas recirculation system 100 as claimed in claim 1, wherein said waste gate valve is a flap valve.
6. The exhaust gas recirculation system 100 as claimed in claim 4, wherein said actuator 105 is a push rod actuator.
Dated this 21st Day of September, 2020

MOHAN RAJKUMAR DEWAN, IN/PA-25
of R.K. DEWAN & COMPANY
APPLICANT’S PATENT ATTORNEY

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, AT CHENNAI