Exhaust Temperature Based Progressive Egr In Diesel Engine

The present invention is related to 'Exhaust Temperature based Progressive EGR in diesel engine', which is intended to achieve the NOx emission target, mainly by introduction of EGR inside the combustion chamber. Exhaust Temperature based Progressive EGR in diesel engine, comprises of a customized assembly of the air intake manifold, Exhaust Manifold, the Engine Block, Flywheel housing, Progressive Type EGR Valve, Exhaust Temperature Sensor, Electronic Control Unit and Pipe Exhaust Gas Recirculation. Said Exhaust temperature based progressive EGR in diesel engine is provisioned for load condition estimation, based on exhaust gas temperature. Said Exhaust temperature based progressive EGR is also provisioned for EGR quantity, to be governed based on exhaust gas temperature. Background of the Invention: In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in petrol/gasoline, diesel engines and some hydrogen engines. EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders. The exhaust gas displaces atmospheric air and reduces O2 in the combustion chamber. Reducing the amount of oxygen reduces the amount of fuel that can burn in the cylinder thereby reducing peak in-cylinder temperatures. The actual amount of recirculated exhaust gas varies with the engine operating parameters. In the combustion cylinder, NO^ is produced by high-temperature mixtures of atmospheric nitrogen and oxygen, and this usually occurs at cylinder peak pressure. In a spark-ignition engine, an ancillary benefit of recirculating exhaust gases via an external EGR valve is an

associated pumping losses. Prior art RU2017135601A, titled Ignition system with prechamber for engine (versions) and method of engine operation The ignition system with a pre-chamber for the engine, containing: a combustion chamber formed by a cylinder closed by a cylinder head; a pre-chamber formed by a cylinder head, wherein the pre-chamber extends away from the cylinder head and into the cylinder and comprises a lower opening having a shape with the possibility of a piston protrusion entering into it; moreover, the piston is located in the cylinder and contains the specified protrusion having a shape corresponding to the inner space of the chamber; and a plurality of holes formed in the side wall of the prechamber located above said protrusion. Another prior patent JP6907157B2 relates to an internal combustion engine having at least one piston operated by directly cooled exhaust gas recirculation (EGR). The principles described in the art are usually spark ignition (SI) engines that operate on gasoline (petroleum), natural gas, or ethanol mixtures, and usually diesel, biodiesel, JP-8 or other jet fuel variants. It can be used in both kerosene, or heavy oil-operated compression ignition (CI) engines. The invention disclosed in this prior art is applicable to both naturally aspirated and forced intake internal combustion engines that use exhaust gas recirculation; wherein the disclosure therein is applicable to direct fuel injection and port fuel injection engines. Though different automotive industry involve one or another kind of conventionally available EGR related system in the vehicle, an effective EGR is very important for effective operations of construction equipment, namely tractor and cranes; wherein said EGR should be so designed, customized and installed with the engine of the said vehicle that it effectively reduces the NOx towards achieving the prescribed emission norms of the territory/country.

input from TPS (Throttle Position Sensor). However, it is observed while conducting the tests towards instant invention that precise amount of EGR can play vital role to achieve the optimum performance & controlling emissions. It has been observed by the inventor herein that in the diesel engines, the exhaust temperature sensor output can be used to estimate the change in load condition of an engine. Based on the exhaust temperature, the input amount of EGR can be varied as per required loading condition. So, based on the exhaust temperature it is the present invention is intended to evaluate load condition of engine. Further, the present invention is intended to predict the load on the engine based on the evaluation of the output from the exhaust temperature sensor and accordingly amount of EGR is ensured. Accordingly, for the instant invention as described and illustrated herein, a precise amount of EGR is important to achieve the optimum performance & emissions. In the diesel engine, engine exhaust temperature changes with respect to the load on the engine. So, based on the exhaust temperature we can evaluate load condition of engine. Based on the exhaust temperature sensor output we are predicting the load on the engine & accordingly amount of EGR is ensured. Present invention is a novel attempt to provide a Exhaust Temperature based Progressive EGR in diesel engine, which is characterized in: • Load condition estimation, based on exhaust gas temperature; and

The prime object of the instant invention is to provide an Exhaust Temperature based Progressive EGR in diesel engine, which is intended to achieve the NOx emission target, mainly by introduction of EGR inside the combustion chamber. Another object of the instant invention is to provide the Exhaust Temperature based Progressive EGR in diesel engine, wherein the preferred embodiment of the said progressive EGR is customized for effective operations of construction equipment, namely tractor and cranes; wherein said EGR should be so designed, customized and installed with the engine of the said vehicle that it effectively reduces the NOx. Another object of the instant invention is to provide the Exhaust Temperature based Progressive EGR in diesel engine, which comprises of a customized assembly of the air intake manifold, Exhaust Manifold, the Engine Block, Flywheel housing, Progressive Type EGR Valve, Exhaust Temperature Sensor, Electronic Control Unit and Pipe Exhaust Gas Recirculation. Another object of the instant invention is to provide the Exhaust Temperature based Progressive EGR in diesel engine; wherein said Exhaust temperature based progressive EGR in diesel engine is characterized in:- • Load condition estimation, based on exhaust gas temperature; and • EGR quantity, to be governed based on exhaust gas temperature. Another object of the instant invention is to provide the Exhaust Temperature based Progressive EGR in diesel engine; wherein precise amount of EGR is important to achieve the optimum performance & emissions and wherein in the diesel engine, engine exhaust temperature changes with respect to the load on the engine.

Progressive EGR in diesel engine, characterized in: • the fact that based on the exhaust temperature we can evaluate load condition of engine; • based on the exhaust temperature sensor output we are predicting the load on the engine & accordingly amount of EGR is ensured. STATEMENT OF INVENTION Exhaust gas temperature changes with respect to change in load condition of an engine. So, the exhaust gas temperature can be used to estimate the change in load condition of an engine. Based on this input amount of EGR can be varied as per required loading condition. SUMMARY OF THE INVENTION: Summary of the Invention: The present invention is related to 'Exhaust Temperature based Progressive EGR in diesel engine', which is intended to achieve the NOx emission target, mainly by introduction of EGR inside the combustion chamber. Exhaust Temperature based Progressive EGR in diesel engine, comprises of a customized assembly of the air intake manifold (1), Exhaust Manifold (2), the Engine Block (3), Flywheel housing (4), Progressive Type EGR Valve (5), Exhaust Temperature Sensor (6), Electronic Control Unit (7) and Pipe Exhaust Gas Recirculation (8); wherein said Exhaust temperature based progressive EGR in diesel engine is characterized in:- • Load condition estimation, based on exhaust gas temperature; and • EGR quantity, to be governed based on exhaust gas temperature.

Precise amount of EGR is important to achieve the optimum performance & emissions. In the diesel engine, engine exhaust temperature changes with respect to the load on the engine. So, based on the exhaust temperature we can evaluate load condition of engine. Based on the exhaust temperature sensor output we are predicting the load on the engine & accordingly amount of EGR is ensured. The invention is described and illustrated with the help of schematic drawing as follows: DETAILED DESCRIPTION OF INVENTION Short details of the drawing: Figure 1: Represents the schematic plan for the assembly of engine block and its peripheral components towards realization of 'Exhaust Temperature based Progressive EGR in diesel engine'. The numerical references used in the said Figure 1 towards indicating the major components of the said assembly of the Exhaust Temperature based Progressive EGR in the diesel engine are as under:-

Reference Numerals Constructional/structural feature of the instant inventive concept relating to the Exhaust Temperature based Progressive EGR in diesel engine 1 Air intake manifold 2 Exhaust Manifold 3 Engine Block 4 Flywheel housing 5 Progressive Type EGR Valve 6 Exhaust Temperature Sensor

8 Pipe Exhaust Gas Recirculation 9 Wiring Harness 10 Direction of EGR Flow In conventional practice, amount of EGR induced inside the engine is ensured based upon the input from TPS (Throttle Position Sensor). However, the field of the present invention discloses that the precise amount of EGR can play vital role to achieve the optimum performance & controlling emissions. It has been observed by the inventor herein that in the diesel engines, the exhaust temperature sensor output can be used to estimate the change in load condition of an engine. Based on exhaust temperature sensor input, ECU will decide the amount of EGR to change as per engine loading condition. So, based on the exhaust temperature it is the present invention is intended to evaluate load condition of engine. Further, the present invention is intended to predict the load on the engine based on the evaluation of the output from the exhaust temperature sensor and accordingly amount of EGR is ensured. Based on exhaust temperature sensor input, ECU will decide the amount of EGR to change as per engine loading condition. The schematic diagram of the Figure 1 provides basic scheme for the construction and realization of the instant inventive concept of "Progressive EGR based on exhaust gas temperature"; wherein it is characterized in at least one of the followings:- • Load condition estimation, based on exhaust gas temperature.

• EGR quantity, to be governed based on exhaust gas temperature. The constructional aspects of the assembly of engine block and its peripheral components towards realization of 'Exhaust Temperature based Progressive EGR in diesel engine' towards achieving the NOx emission target, mainly by introduction of EGR inside the combustion chamber has been indicated in Figure 1 hereinbelow. It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:-

CLAIM: 1. Exhaust Temperature based Progressive EGR in diesel engine, composing of a customized assembly of the air intake manifold (1), Exhaust Manifold (2), the Engine Block (3), Flywheel housing (4), Progressive Type EGR Valve (5), Exhaust Temperature Sensor (6), Electronic Control Unit (7) and Pipe Exhaust Gas Recirculation (8); wherein said Exhaust temperature based progressive EGR in diesel engine is characterized in:- • Load condition estimation, based on exhaust gas temperature; • EGR quantity, to be governed based on exhaust gas temperature; and • achieving the NOx emission target, mainly by introduction of EGR inside the combustion chamber.

2. Exhaust Temperature based Progressive EGR in diesel engine, as claimed in claim 1, wherein metered EGR quantity is governed based on the exhaust gas temperature of the engine. 3. Exhaust Temperature based Progressive EGR in diesel engine, as claimed in claim 1, wherein exhaust gas temperature changes with respect to change in load condition of an engine and therefore, the exhaust gas temperature is used to estimate the change in load condition of an engine, wherein based on exhaust temperature sensor input, ECU decides the amount of EGR to change as per engine loading condition. 4. Exhaust Temperature based Progressive EGR in diesel engine, as claimed in claim 1, as indicated in the Figure-1, as under.