HEXA

ENGINE

1.1 GENERAL INFORMATION:

A. ENGINE INTRODUCTION:

The 2.2L VARICOR engine used on this

vehicle is a state of art modern Direct Injection

Common Rail diesel unit. This engine is using twin

overhead camshafts and 16 valves which help in

good breathing.

Delphi common rail diesel injection system

with 1600 bar injection pressure is used and

controlled by a fast 32-bit electronic control unit.

The engine performance is optimized for various

engine speed, load and operating conditions

depending upon the various sensors input.

The turbocharger (VTT) used on this engine

works on Variable Turbine Technology (VTT) has

low inertia of turbine and compressor wheels

which reduce the turbo lag at low engine speeds

and improves the transient response of the

vehicle. This turbocharger incorporates many

movable vanes in the turbine housing to control

the exhaust flow against the turbine blades which

enables higher power, torque, lower fuel

consumption and emissions of the engine. The

actuation of the vane angle is done electrically by

the EMS

The fuel economy and emission has been

optimized at source by means of low engine

friction, faster engine warm up, centralized

injectors, optimized combustion, closed coupled

catalytic converter, closed loop operation of the

turbocharger (VTT) etc.

Hydraulic Lash Adjusters and Roller Finger

Followers are used for maintenance free quiet

operation and reduced friction. Toothed belt drive

with automatic belt tensioner is used for quiet

engine operation for longer period. The engine

NVH is optimized by means of optimized engine

mounts, multiple injection strategy etc. The engine

weight has been optimized by using Aluminum

cylinder head, gallery cooled piston, non-linered

cylinder block with spherical skirt, superior alloy

material for high strength.

The CCC (Close Coupled Catalytic Converter)

is fitted in this vehicle to further reduce the

emissions. The CCC filters harmful carbon

particles before they leave the exhaust.