FIELD OF INVENTION
This invention relates to a diesel engine with steam injection to control emission of Nox.
PRIOR ART
An EGR (Exhaust Gas Recirculation) technology is used to achieve higher levels of emissions norms, wherein Exhaust gases are re-circulated from Exhaust manifold to Intake manifold. In order to further reduce emission levels, EGR gases are cooled through EGR Cooler. The Cooled EGR Re¬circulation leads to the following:
Acid formation by condensation of EGR gases, Availability of sulphur & other elements responsible for formation of acid, which damages the engine parts & reduces the life of engine. High soot formation leading to lower piston assy. Life. Deterioration of engine performance. High particulate matter emission. Deteriorating of Engine Oil. Higher blow by 85 engine consumption.
Reference may be made to fig. 1, wherein it can be seen that Exhaust gases are coming from outlet EGR COOLER pipe and mixing with Compressed Air from Inter cooler outlet pipe.
OBJECTS OF THE INVENTION
The primary object of the present invention is to provide a diesel engine with steam injection to reduce Emission Nox with minimum performance deterioration, deterioration of Engine Oil and reduction of piston assembly life.
Another object of the present invention is to provide a diesel engine with steam injection which overcomes disadvantages associated with the prior art.
Still another object of the present invention is to provide a diesel engine with steam injection to achieve higher levels of emission norms.
STATEMENT OF INVENTION
According to this invention, there is provided a diesel engine with steam injection to control emission of Nox comprising of intake manifold injected with steam wherein pressure of steam chamber and flow of steam to engine is controlled by one way pressure valve.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
Figure 1 shows: conventional fitment layout.
Figure 2 shows: modified fitment layout.
Figure 3 shows: steam control valve in closed position (spring force is greater as compared to force exerted by steam, hence no steam flow). Figure 4 shows: steam control valve in open position (spring force is less as compared to force exerted by steam, hence steam flow).
DETAILED DESCRIPTION OF THE PRESENT INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS:
The present invention discloses a diesel engine with steam injection to inject the steam in intake manifold to control the Nox. In this system, the water is converted into steam using heat from the Exhaust gases. The pressure of steam chamber is controlled by one way pressure valve. The flow of steam to the engine is also controlled by this valve. When the pressure of steam is greater than the pressure of spring inside valve, the steam pushes the plunger to enter inside intake manifold.
The instant invention comprising of the following parts:-Engine Assembly
Heat exchanger for steam generation. Water inlet pipe Steam output pipe Steam control valve Water Tank
In the present invention, the water flows through heat exchanger from water tank and is converted into steam. The pressure inside heat exchanger is controlled by on way valve. Steam flow to engine is also controlled by this valve. The fitment of steam injection in diesel engine is shown in fig. 2. It can be observed that, produced steam flows in intake manifold through steam control valve. Said steam control valve is provided with motion plunger inside the valve body which is controlled by the mutual opposite forces applied by spring 85 steam pressure formed by heat exchanger. The spring force exerts opposite to that of the pressure of steam. When the spring force is high (in case of lower steam pressure), the spring pushes the plunger & keeps it in closed position (Fig. 3).
When the produced steam pressure is high (causing higher pressure than spring pressure), the plunger starts moving & uncovering the orifice creating a path for steam to reach the intake manifold (Fig. 4). In this case, the flow of steam depends on the steam pressure. In case, the steam pressure is too high it shuts the path of steam to intake manifold.
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:-

WE CLAIM;
1. A diesel engine with steam injection to control emission of Nox comprising of intake manifold injected with steam wherein pressure of steam chamber and flow of steam to engine is controlled by one way pressure valve.
2. A diesel engine as claimed in claim 1, wherein water flows through heat exchanger from water tank and is converted into steam using heat from the exhaust gases.
3. A diesel engine as claimed in claim 1 or 2, wherein the one way valve controls the pressure inside heat exchanger and steam flow to engine.
4. A diesel engine as claimed in any of the preceding claims, wherein said steam control valve is provided with motion plunger inside the valve body, which is controlled by the mutual opposite forces applied by spring and steam pressure formed by the heat exchanger.
5. A diesel engine as claimed in any of the preceding claims, wherein when the steam pressure is lower, the spring pushes the plunger and keeps it in closed position.
6. A diesel engine as claimed in any of the preceding claims, wherein when the steam pressure is high, the plunger starts. moving and uncovering the orifice creating a path for steam to reach the intake manifold.
7. A diesel engine with steam injection to control emission of Nox substantially as herein described with reference to the accompanying drawings.