DTSI engine. Epuri Naveenchand. 1 ABSRTACT: The latest trend of new generation bikes and cars is to use new technology and high speed. It has become a. Download DTSi Technology seminar report, ppt, pdf, DTSi Technology Seminar Topics, Abstracts, Full Project Work on dtsi si by backmocadiwus.gq DTSI backmocadiwus.gq DUE TO HIGHER EMISSIONS IN FOUR STOKE PETROL ENGINE WHEN THE FUEL IS IGNITED. WITH ONE SPARK •The DTSi - Digital Twin Spark ignition -.
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DIGITAL TWIN SPARK IGNITION (DTSI). A New Revolution of Twin Spark in I.C. Engine. Noorani Tufel,. Student, L. J. institute of Engineering & Technology. DTSI techonology seminar report for rite college - Free download as PDF File . pdf), Text File .txt) or read online for Various Components of DTSi Engine. Digital Twin Spark Ignition Final - Free download as PDF File .pdf), Text File .txt) or read of a detailed fuel injection system simulation model for dtsi engines.
Eight counterweights ensure optimal balancing of the high strength nitride steel crankshaft.
The pressed-in cast iron cylinder liners feature wet mounting for more effective heat dissipation. It consists of following parts: Piston Cylinder Crankshaft Connecting rod Fly wheel Carburettor 2-sparkplug 2-ports 2-valves Here the only change made is that the 2 sparkplug placed at the two opposite end of the combustion chamber At 90 degree to each other. The timing of the valve train is not fixed as in most present day engines, but can be adjusted by a patented device conceived and produced by Alfa Romeo, the timing variation.
This is an electro-hydraulic actuator keyed onto the gear that drives the camshaft acting on the intake valves. This actuator enables the camshaft to be shifted into two different angular positions and to modify the intake valve opening durations.
Its operation is controlled by the electronic control box of the integrated ignition and fuel injection system.
Valve timing actuator logic is predetermined so that overlap - i. At high and medium-high engine speeds or whenever additional power has to be provided normal timing cylinder filling is optimal, maximizing power output and torque At low and medium-low revs and lighter loads delayed timing , fluctuation-free operation is ensured combined with a reduction in specific consumption.
At all engine speeds, noxious emissions are minimized. Fuel feed The Alfa T. Spark power plant is equipped with the ML 4. The excellent volumetric efficiency of the Twin Spark engine is also enhanced by the special straight section individual intake man folding that cuts down losses and fully exploits intake resonance for better mid-range torque.
Having all thermodynamic cycle components under the wings of a single electronic control unit means that the power plant used on the Alfa 1 64 T.
Spark can guarantee-in addition to outstanding torque and power figures-regular, smooth running at all speeds regardless of load.
Which require less time to reach the farthest position of the combustion chamber and optimize the combustion chamber characteristics. There are some advance technology used in DTS-i engine which makes it more powerful than the conventional single sparkplug 4-stroke engine like 1. Tricks III technology 2. Throttle Responsive Ignition Control System 3rd generation.
It is a means of controlling the Ignition by operating the Throttle. Depending on the needs of the Rider whether it be cruising, acceleration or max speed, the ignition requirements constantly change. Based on a particular amount of Throttle opening, the Magnetic field generated by the Magnet opens or closes the Reed switch.
This helps in achieving a good balance between driveability and Optimum 9 Ignition Spark advance, resulting in an almost perfect Ignition Spark advance for every Throttle opening and Engine rpm.
A Digital CDI with an 8 bit microprocessor chip handles the spark delivery. The programmed chips memory contains an optimum Ignition timing for any given engine rpm, thereby obtaining the best performance characteristics from the combustion chamber. Ignition The ignition system on the Twin spark is a digital system with static spark advance and no moving parts subject to wear. It is mapped by the integrated digital electronic control box which also handles fuel injection and valve timing.
As a result, the adoption of twin spark ignition yields: 10 A remarkable improvement in thermodynamic efficiency and hence a considerable increase in the amount of power available; more effective combustion at low load and at idling speed; A sizeable reduction in specific fuel consumption; A reduced exhaust emission; Less chance of ignition system failure Failure of either circuit will not stop the engine, which can still work with single spark ignition.
Because of twin Sparks the diameter of the flame increases rapidly that would result in instantaneous burning of fuels.
Thus force exerted on the piston would increase leading to better work output. The engine tends to overheat and loose power at higher speeds as compared to a single plug engine. In case the Engine is kept unused for a long time soiling of spark plugs occur.
Twin Spark system helps to reduce this problem. Since these technologies also minimize the fuel consumption and harmful emission levels, they can also be considered as one of the solutions for increasing fuel costs and increasing effect of global warming.
From this paper I have concluded that perfect Combustion in Internal Combustion engine is not possible. So for the instantaneous burning of fuels in I. Development and validation of a detailed fuel injection system simulation model for dtsi engines. SAE Technical Papers, 01 , A fast rate of combustion is achieved leading to faster rise in pressure. The obvious outcome of this is more torque, better fuel efficiency and lower emissions.
However very few small capacity engines did eventually implement such a scheme in their production prototypes. Power Torque Speed kmph kmph 4.
Mileage kmpl kmpl 5. Digital spark technology is currently used in Bajaj motor cycles in India, because they have the patent right. Digital twin spark ignition technology powered engine has two spark plugs. It is located at opposite sides of combustion chamber.
This DTS-I technology will have greater combustion rate because of twin spark plug located around it. The engine combust fuel at double rate than normal.
This enhances both engine life and fuel efficiency. It is mapped by the digital electronic control box which also handles fuel ignition and valve timing.
Microprocessors continuously senses speed and load of the engine and respond by altering the ignition timing there by optimizing power and fuel economy. The main components of DTS-i engine 5. Which is typically cast from aluminum or cast-iron before receiving precision machine work.
Cylinders may be sleeved lined with a harder metal or sleeveless with a wear-resistant coating such as Nikasil. A piston is seated inside each cylinder by several metal piston rings fitted around its outside surface in machined grooves; typically two for compressional sealing and one to seal the oil.
The rings make near contact with the cylinder walls sleeved or sleeveless , riding on a thin layer of lubricating oil; essential to keep the engine from seizing and necessitating a cylinder wall's durable surface. Cylinder block this is a cast structure with cylindrical holes bored to guide and support the pistons and to harness the working gases.
Cylinder head is casting encloses the combustion end of the cylinder block and houses both the inlet and exhaust poppet- valves and their ports to admit air — fuel mixture and to exhaust the combustion products. In a reciprocating engine, it translates reciprocating linear piston motion into rotational motion. In order to do the conversion between two motions, the crankshaft has "crank throws" or "crankpins", additional bearing surfaces whose axis is offset from that of the crank, to which the "big ends" of the connecting rods from cylinder attach.
It is typically connected to a flywheel to reduce the pulsation characteristics of the four — stroke cycle, and sometimes the torsional or vibratioal damper at the opposite end, to reduce the torsional vibrations often Caused along the length of the crankshaft by the cylinder farthest from the output end acting on the torsional elasticity of the metal.
Together with the crank, they form a simple mechanism that converts reciprocating motion into rotating motion. As a connecting rod is rigid, it may transmit either a push or a pull and so the rod may rotate the crank through both halves of a revolution, i.
Earlier mechanisms, such as chains, could only pull. In a few two-stroke engines, the connecting rod is only required to push. In modern automotive internal combustion engines, the connecting rods are most usually made of steel for production engines, but can be made of T and T aluminum alloys for lightness and the ability to absorb high impact at the expense of durability or titanium for a combination of lightness with strength, at higher cost for high performance engines, or of cast iron for applications such as motor scooters.
They are not rigidly fixed at either end, so that the angle between the connecting rod and the piston can change as the rod moves up and down and rotates around the crankshaft. Connecting rods, especially in racing engines, may be called "billet" rods, if they are machined out of a solid billet of metal, rather than being cast or forged. Flywheels are often used to provide continuous energy in systems where the energy source is not continuous.
In such cases, the flywheel stores energy when torque is applied by the energy source, and it releases stored energy when the energy source is not applying torque to it.
A flywheel is used to maintain constant angular velocity of the crankshaft in a reciprocating engine. The amount of energy stored in a flywheel is proportional to the square of its rotational speed. Energy is transferred to a flywheel by applying torque to it, thereby increasing its rotational speed, and hence its stored energy. Conversely, a flywheel releases stored energy by applying torque to a mechanical load, thereby decreasing its rotational speed.
Flywheels are typically made of steel and rotate on conventional bearings; these are generally limited to a revolution rate of a few thousand rpm. Some modern flywheels are made of carbon fiber materials and employ magnetic bearings, enabling them to revolve at speeds up to 60, rpm.
Preparation of fuel-air mixture is done outside the engine cylinder and formation of a homogeneous mixture is normally not completed in the inlet manifold. Fuel droplets which remain in suspension continue to evaporate and mix with air even during suction and compression processes.
The process of mixture preparation is extremely important for spark ignition engines. The purpose of carburetion is to provide a combustible mixture of fuel and air in the required quantity and quality for efficient operation of the engines under all conditions. The process of information of a combustible fuel-air mixture by mixing the proper amount of fuel with air before admission to engine cylinder is called carburetion and the device which does this job is called a carburetor.
Under normal conditions it is desirable to run the engine on the maximum economy mixture, viz. For quick acceleration and for maximum power, rich mixture , viz. Here the only change made is that the 2 sparkplug placed at the two opposite end of the combustion chamber At 90 degree to each other. The distance between the spark plugs depend upon the displacement of the engine. Dual spark plug are used from cc engines, up to high displacement engines. Because the ignition rate is double; the power is generated product and gases expands more faster which in turns push the piston more powerfully and we get better pickup and because approximately all the fuel being ignited at once we get better fuel efficiency as well.
It consists of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The portion of the hole where the plug meets with it is referred as the 'seat' or 'valve seat'.
The shaft guides the plug portion by sliding through a valve guide. In exhaust applications a pressure differential helps to seal the valve and in intake valves a pressure differential helps open it. Ignition with a Digital C.
A Digital CDI with an 8 bit microprocessor chip handles the spark delivery. It was originally developed to overcome the long charging times associated with high inductance coils used in inductive discharge ignition IDI systems, making the ignition system more suitable for high engine speeds for small engines, racing engines and rotary engines.
The capacitive-discharge ignition uses capacitor discharge current output to fire the spark plugs. Most ignition systems used in cars are inductive discharge ignition IDI systems, which are solely relying on the electric inductance at the coil to produce high- voltage electricity to the spark plugs as the magnetic field collapses when the current to the primary coil winding is disconnected disruptive discharge. In a CDI system, a charging circuit charges a high voltage capacitor, and at the instant of ignition the system stops charging the capacitor, allowing the capacitor to discharge its output to the ignition coil before reaching the spark plug.
A typical CDI module consists of a small transformer, a charging circuit, a triggering circuit and a main capacitor. First, the system voltage is raised up to to volts by a power supply inside the CDI module. Then, the electric current flows to the charging circuit and charges the capacitor. The rectifier inside the charging circuit prevents capacitor discharge before the moment of ignition.
When the triggering circuit receives triggering signals, the triggering circuit stops the operation of the charging circuit, allowing the capacitor to discharge its output rapidly to the low inductance ignition coil.
Capacitive Discharge Ignition: It is a means of controlling the ignition by operating the throttle. Depending on the needs of the rider whether it be cruising, acceleration or max speed, the ignition requirements constantly change.
Based on a particular amount of throttle opening, the magnetic field generated by the magnet opens or closes the reed switch. The reed switch is connected to the Digital C. This helps in achieving a good balance between drive ability and optimum ignition spark advance, resulting in an almost perfect ignition spark advance for every throttle opening and engine rpm.
Figure 1 7. Which require less time to reach the farthest position of the combustion chamber and optimize the combustion chamber characteristics.