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Glossary: I

Integrated Chassis Control System


The Integrated Chassis System (ICCS) is a General Motors technology that integrates brakes, steering, suspension and traction control, using electronic sensors for more precise handling. It is currently used in some Cadillac models.
Independent Suspension


The independent suspension is a system where each wheel can be moved on a vertical axis without influencing the other, and can react independently to bumps on the road.



An inline-six (or straight six) is an engine configuration where all cylinders sit in a straight line across the crankcase, while all the pistons are driving the same crankshaft. Along the V12 and other similar layouts, it is the best naturally balanced engine configuration.
Instant Traction


Insta Trac is a GM marketing name for a 4WD system that gives a vehicle the ability to shift from four to two-wheel drive and vice-versa without stopping. In older 4WD vehicles with a transfer box the driver had to manually engage the hubs at each wheel. Integrated child seats


Some manufacturers offer integrated folding child seats into the normal seats of their vehicles. When not in use, the child seats can be retracted into the normal seats, which are usually in the rear part of the vehicle cabin.


The intercooler is a device used to cool the air coming into the combustion chamber on turbocharged and/or supercharged engines. This is done because cooler air produces more power, and charged engines tend to heat the intake air while it's being compressed, thus decreasing its burn and combustion chamber fill-up efficiency. Most intercoolers have an air-to-air system, air-to-liquid system, or sometimes combination of both.
Internal balancer


The internal balancer is a gear-driven balancer that absorbs engine vibration for a smoother operation and enhanced reliability.


ISOFIX is the name of standardized child seat anchorages used by most car manufacturers. It defines the standard attachment points to be built into cars, thus enabling manufacturer compliant child safety seats to be quickly and safely secured into the car's rear seats. On cars with a front passenger airbag deactivation option, the ISOFIX is also available for the front passenger seat.

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