Multi-point fuel injection (MPFI): The fuel is injected into the intake manifold, above the intake value., The fuel is injected at the time of suction stroke., It operated at a comparatively lower pressure than DI., It is less efficient than DI ststem., It requires only a low-pressure pump for its operation., The engine emissions are comparatively higher., It is less expensive., There are no modifications in the piston for fuel injection., Direct injection (DI): The fuel is injected directly into the combustion chamber., The fuel is injected after the compression stroke., It operated at a higher pressure than MPFI., It is more efficient than the MPFI system., It requires a fedd pump and fuel injector pump for its operation., It has lower engine emissions., It is more expensive than MPFI., The piston is modified for efficient working.,

Multi-point fuel injection Vs Direct injection

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