Prince engine

From Wikipedia, the free encyclopedia

BMW/PSA Prince engine
Manufacturer:	BMW PSA Group
Production:	2005–
Predecessor:	Tritec engine
Class:	Straight-4
Engine:	1.4 L 1.6 L

Prince is the codename for a family of modern automobile straight-4 engines developed jointly by BMW and PSA Peugeot Citroën. It is a compact engine family of 1.4–1.6 L in displacement and includes most modern features including gasoline direct injection and variable valve timing.

For BMW, the engines will replace the BMW/Chrysler Tritec engine family in the MINI. PSA will use the Prince family in place of their TU family.

The engines components will be produced by PSA at their Douvrin, France facility, with MINI engine construction at Hams Hall in Birmingham, United Kingdom. The joint venture was announced on July 23, 2002 with the first engines produced in 2005.

1 Engineering
2 1.4
3 1.6
- 3.1 Naturally-aspirated
- 3.2 Turbocharged
4 References
5 Note
- 5.1 Sources

[edit] Engineering

The Prince family shares only its basic block dimensions with the previous PSA TU engine family. Much of the advanced engineering was provided by BMW, including their Valvetronic variable valve lift system on the intake side. Other advanced features include on-demand oil and water pumps. Gasoline direct injection with a twin-scroll turbocharger will be optional.

All Prince engines will share 84 mm (3.3 in) cylinder spacing and a 77 mm (3 in) bore. The engine features a two-piece "bedplate" aluminum crankcase for extra stiffness.

[edit] 1.4

The 1.4 L PSA ET3 is the likely first example of the Prince family. It is used in the Peugeot 307.

[edit] 1.6

The 1.6 L engine will be used in the second-generation BMW MINI. It has a 85.8 mm (3.4 in) stroke for a total of 1598 cc of displacement.

[edit] Naturally-aspirated

The naturally-aspirated variant has conventional fuel injection and lost-foam cast heads. Its high 11:1 compression ratio creates an output of 120 PS (118 hp/88 kW) at 6000 rpm with a redline of 6500 rpm. Torque is 160 N·m (118 ft·lbf) at 4250 rpm.^[1]

[edit] Turbocharged

The turbocharged 1.6 L unit adds gasoline direct injection and has special low-pressure die-cast heads. Maximum torque is 177 ft·lbf (240 N·m) at 1400 rpm, remaining flat to 4000 rpm. Power output is 175 PS (173 hp/128 kW) at 5500 rpm.