What is DDIS “Direct Diesel Injection System” ???

v  DDiS stands for “Direct Diesel Injection System”

                                       

                     

v  DDiS consists of fixed / variable geometry turbocharger. Swift and Dzire features fixed geometry while in case of SX4 variable geometry turbocharger is on duty.

v  Turbocharger is basically a mechanism to increase the available quantity of oxygen in combustion chamber thus enhancing engine performance.

v   Turbocharger are driven by exhaust gases, there is no extra load on the engine.

v   Once the output of the engine reaches a certain pre-defined level the exhaust gases are fed into the inlet passage so as to increase the available air inside the combustion chamber. More air injected into the engine helps in increasing the engines performance.

v  Third essential part of  DDiS technology is the intercooler. Intercooler helps increase the efficiency of the combustion process.

v   Since the air temperature increases thanks by being compressed in the turbocharger, this hot air if fed into the combustion chamber would result in before pre-defined time ignition of the air fuel mixture in the chamber – This phenomena is called ‘Detonation’.

v  This before time combustion of air fuel mixture is not only harmful to the engine but it also reduces its overall performance efficiency. Detonation reduces car’s fuel mileage and increases harmful emissions.

v  In this technology multi step injection is done due to this technology engine produce less noise & less vibration.

v  The new diesel engine is 65- 70 kg  heavier than the petrol counterpart.

v The lightest diesel engine, endowing it with a high power-to-weight ratio. With a total displacement of 1,248cc, the DDiS engine puts out a peak power of 75bhp (5bhp more than the European version) at 4,000 rpm.