Engine: Description and Operation

DESCRIPTION





MultiAir technology manages the torque and power delivered by the engine by varying the lift profile of the intake valves without direct use of the throttle body. The main features of the MultiAir engine are:

- Single camshaft
- Standard and hydraulic exhaust tappets
- Intake tappets integrated in the MultiAir actuator
- Brake servo vacuum pump

Compared to a traditional engine, the special characteristics of the MultiAir system offer better combustion control and a faster response to torque requests, both of which are available and exploitable at each top dead center (TDC). This means:

- Reduced fuel consumption
- Reduced CO2 emissions
- Increased power and torque
- Increased driver responsiveness
- Less pollution
- Easier start-up





The MultiAir system consists of a hydraulic-mechanical actuator fitted inside the MultiAir engine. MultiAir also includes hardware and software electronic components, built into the powertrain control module (PCM) to manage the engine intake valve motion. At each engine cycle, the MultiAir system controls the quantity of fresh air entering each cylinder by managing intake valve motion.





The readable engine identification is located near the flywheel end of the engine on a machined surface along with a QR Code scannable code symbol. The engine identification is structured as follows:

(1) Block Type (four digits):

- 0001 = Naturally Aspirated
- 0002 = Turbocharged
- 0003 = Naturally Aspirated with Cold Weather Package
- 0004 = Turbocharged with Cold Weather Package

(2) Julian Date (three digits).

(3) Calender Year (one digit).

(4) Line Designation (one digit). C = Block Line 1.4L FIRE.

(5) Part Sequence for the day (four digits).