Pentastar
| Chrysler Pentastar engine | |
|---|---|
| Overview | |
| Manufacturer | FCA US LLC |
| Production | 2011–present |
| Combustion chamber | |
| Configuration | 60° V6 |
| Displacement | 3.0 litres (183 cu in) 3.2 litres (198 cu in) 3.6 litres (220 cu in) |
| Cylinder bore | 91 mm (3.6 in) (3.2L) 96 mm (3.8 in) (3.6L) |
| Piston stroke | 83 mm (3.3 in) (3.2L & 3.6L) |
| Cylinder block alloy | Aluminium |
| Cylinder head alloy | Aluminium |
| Valvetrain | Dual overhead camshaft |
| Compression ratio | 10.7:1 (3.2L) 10.2:1 (3.6L) |
| Combustion | |
| Fuel system | Sequential Multiple-Port Fuel Injection |
| Fuel type | Gasoline E85 |
| Oil system | Wet sump |
| Cooling system | water-cooled |
| Output | |
| Power output | 230 hp (170 kW) (3.0L) 271 hp (202 kW) (3.2L) 275–305 hp (205–227 kW) (3.6L) |
| Torque output | 210 lb·ft (280 N·m) @ 4400 rpm (3.0L) 239 lb·ft (324 N·m) @ 4400 rpm (3.2L) 251–268 lb·ft (340–363 N·m) (3.6L) |
| Dimensions | |
| Length | 503 mm (19.8 in) |
| Chronology | |
| Predecessor |
Chrysler SOHC V6 Chrysler 3.3 & 3.8 engine Chrysler LH engine Chrysler Powertech V6 |
The Chrysler Pentastar engine family is a series of aluminium (die-cast cylinder block) dual overhead cam 24-valve V-6 gasoline engines introduced for model-year 2011 Chrysler, Dodge and Jeep vehicles. FCA has invested heavily in plants ($2 billion, not including engineering of the engines themselves). The engine was initially named "Phoenix", but the name was changed before the official launch due to a trademark conflict; the Pentastar name is derived from the now-defunct trademark of the former Chrysler Corporation, which dates back to 1963. The Pentastar was introduced at the 2009 New York Auto Show. The engine design also allows the use of E85 or 87 octane fuel, supports cylinder deactivation, and features dual variable valve timing. The Pentastar engine currently does not use EGR however it not only supports the use of the technology but is expected to add it in a near-term engine update known as the "2016 Pentastar". Both Direct Injection as well as forced-air induction options were engineered into the Pentastar engine's design, however, like cylinder deactivation, these have not yet been implemented from the factory and remain "on the shelf" at this time.
For 2016, FCA released an updated version of the 3.6 L engine for the Jeep Grand Cherokee. This engine now featured two-stage variable valve lift (VVL), a cooled EGR, a new intake manifold, new fuel injectors, and new ignition coils. It also features upgrades to the variable valve timing (VVT) system, an increased compression ratio (11.3:1), lower internal friction and lower weight. The new engine also has MDS like the Hemi and will shut off two of its cylinders while driving and make it a v4 while cruising the freeway. These improvements help to increase power as well as efficiency.
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