PRESENTED BY JYOTEN PANDITPAUTRA(1225016) SUVARNA GHULE(1225017) YOGI BHIMANI (1225020) DHEER DEDHIA (1225024) WHAT IS DTSI ? WHY IS IT USED ? OPERATING PRINCIPLE COMPONENTS WORKING ADVANTAGES DISADVANTAGES FUTURE SCOPE REFERENCES DTSI means Digital Twin Spark Ignition system. It has Two Spark Plugs that are use to ignite the charge in the combustion chamber. The Twin Spark Plugs ensure faster and better combustion. In this system the spark timing is controlled by a computer that continuously adjust ignition timing to obtain Optimum combustion. In conventional engines the air-fuel mixture does not get combusted completely. So We use DTSI technology. To reduce dependence on mechanical system for controls. For more accurate and precise ignition timing. In the DTSI system a timer is employed in the distributor instead of contact breaker. This timer may be a pulse generator which triggers the ignition module, also called electronic control unit. (E.C.U.) . This control unit primarily contains transistor circuit whose base current is triggered off & on by timer which result in starting & stopping of primary current. Other than this, the electronic ignition system work similar to the conventional electrical pointtype system MICROPROCESSORS/CPU : It has taken over many of the tasks in cars that were formerly performed by vacuum, mechanical or electromechanically devices. When properly programmed, they can carry out explicit operations with blinding speeds and almost flawless consistent. POSITION SENSORS: The CPU receives feedback from the sensors and checks along the programmed value. Depending on the input, the computer will control the actuators until the programmed results are obtained. A/D CONVERTER: Output of some position sensor is in the analog form while computer can only read in digital form. To overcome this communication problem all analog voltage are converted in digital format by a device known as an analog to digital converter. This produces a digital wave signal that can directly go to the CPU. 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. It features two plugs per cylinder. This innovative solution, also entailing a special configuration of the hemispherical combustion chambers and piston heads, ensures a fast, wide flame front when the air-fuel mixture is ignited, and therefore less ignition advance, enabling, moreover, relatively lean mixtures to be used. As a result, the adoption of twin spark ignition yields: Digital Twin Spark ignition engine has two Spark plugs located at opposite ends of the combustion chamber and hence fast and efficient combustion is obtained. The benefits of this efficient combustion process can be felt in terms of better fuel efficiency and lower emissions. 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. It features two plugs per cylinder. This innovative solution, also entailing a special configuration of the hemispherical combustion chambers and piston heads, ensures a fast, wide flame front when the airfuel mixture is ignited, and therefore less ignition advance, enabling, moreover, relatively lean mixtures to be used. This technology provides a combination of the light weight and twice the power offered by two-stroke engines with a significant power boost, i.e. a considerable "power-toweight ratio" compared to quite a few fourstroke engines. Less vibrations and noise. Long life of the engine parts such as piston rings and valve stem. Decrease in the specific fuel consumption. No over heating. Increase the Thermal Efficiency of the Engine & even bear high loads on it. Better starting of engine even in winter season & cold climatic conditions or at very low temperatures because of increased Compression ratio. 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. There is high NOx emission. If one spark plug get damaged then we have to replace both. The cost is relatively more This technology is presently being used by one of the largest two wheeler manufacturers of India Bajaj Ltd. They have a Patent of this technology which gives them an edge over the competitors. They have implemented this in most of their product line up. PULSAR SERIES, DISCOVER RANGE The case study can be explained by the video.