Tritec engine

Last updated
Tritec engine
2005 blue MINI Cooper convertible engine.JPG
Overview
Manufacturer Tritec Motors
Production19992007
Layout
Configuration Straight-4
Displacement 1.4 L (1,397 cc)
1.6 L (1,598 cc)
Cylinder bore 77 mm (3.03 in)
Piston stroke 75 mm (2.95 in)
85.8 mm (3.38 in)
Block material Cast iron
Head material Aluminum alloy
Valvetrain SOHC 4 valves x cyl.
Compression ratio 8.3:1, 10.5:1
Combustion
Supercharger Eaton M45 Roots type with intercooler (in some versions)
Fuel system MPSEFI
Fuel type Gasoline
Cooling system Water-cooled
Output
Power output 55–160 kW (75–218 PS; 74–215 hp)
Torque output 122–250 N⋅m (90–184 lb⋅ft)
Chronology
Successor Fiat E.torQ engine
Prince engine

The Tritec engine (also known as Pentagon) is a four-cylinder petrol engine that was manufactured between 1999 and 2007 by Tritec Motors in Brazil and was used in various cars including Chrysler and Mini models.

Contents

Tritec Motors Ltda

In 1997, Chrysler Corporation and Rover Group (then a subsidiary of BMW) formed a joint venture called Tritec Motors to design a new small straight-4 engine. The new company built a factory in Campo Largo of Curitiba, Brazil specifically to manufacture the new engine. The Tritec name stands for the union of the three countries involved: Germany, the United Kingdom, and Brazil.

When BMW broke up the remains of Rover Group in 2000, BMW kept the stake in Tritec Motors as the engine was in use in the Mini range which BMW had retained. In 2007 BMW sold its 50% stake to DaimlerChrysler and cancelled its contract for the Tritec engine. [1] BMW entered into a new joint venture with PSA Peugeot Citroen to develop the Prince engine which is used in the second generation Mini cars. [2]

The factory had a capacity of 400,000 engines a year, [3] and in 2006 production was around 200,000 engines. Production ceased in June 2007 following the ending of the joint venture. [4]

In March 2008 Fiat Powertrain Technologies bought the plant and licenses to produce Tritec engines at a cost of €83 million, [5] and in 2010 subsequently launched its own E.torQ engine.

Engine details

It is a modern engine with an SOHC 16-valve head, electronic throttle control, and meets Euro IV emissions requirements. There are three versions of the engine, 1.4 L (1,397 cc), 1.6 L (1,598 cc) and supercharged 1.6 L (1,598 cc).

BMW complained about the performance of the engine. According to Ward's Auto, Erich Sonntag of BMW described the Tritec engine as old fashioned and not very effective on function, performance and fuel efficiency. This was no news to the Rover Group engineers on the MINI project, who had wanted to use Rover's K-Series engine, which had greater specific power output, better fuel efficiency, was built next door to the proposed MINI line at Longbridge, and already had amortised its R&D. [6]

1.4 (T14a)

The 1.4 L (1,397 cc) version uses a bore and stroke of 77 mm × 75 mm (3.03 in × 2.95 in). Like all Tritecs, it is an SOHC 16-valve cast iron engine with an aluminium cylinder head and multipoint sequential electronic fuel injection. Output is rated at 55 kW (75 PS; 74 hp) and 122 N⋅m (90 lb⋅ft).

Applications:

1.6 (T16b3)

The 1.6 L (1,598 cc) version uses the same 77 mm (3.03 in) bore with a longer 85.8 mm (3.38 in) stroke. Output is rated at 66 kW (90 PS; 89 hp) and 140 N⋅m (103 lb⋅ft) in the Mini One, and 85 kW (116 PS; 114 hp) and 149 N⋅m (110 lb⋅ft) in the Mini Cooper and Chrysler PT Cruiser.

Applications:

1.6 SC (T16b4)

The 1.6 SC uses an Eaton M45 Roots type supercharger with intercooler. The compression ratio is reduced from 10.5:1 to 8.3:1. Output was initially rated at 120 kW (160 PS; 160 hp) and 210 N⋅m (150 lb⋅ft) of torque and increased to 125 kW (170 PS; 168 hp) and 220 N⋅m (160 lb⋅ft). The 1.6 L (1,598 cc) SC won the "1.4 L to 1.8 L" category at the International Engine of the Year awards for 2003. It also won Ward's 10 Best Engines award for 2003.

The 2006 Mini John Cooper Works GP Kit was upgraded to 160 kW (218 PS; 215 bhp) at 7,100 rpm and 250 N⋅m (184 lb⋅ft) of torque at 4,600 rpm. [7]

Applications:

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References

  1. "BMW Out of Tritec Engine JV". Wards Auto. 12 July 2007. Retrieved 1 February 2013.
  2. "BMW signs-off Tritec engine project to Chrysler". Motor Authority. 7 June 2007. Retrieved 1 February 2013.
  3. "BMW, Chrysler Break Ground for Joint Tritec Engine Plant". Auto Channel. 14 April 1998. Retrieved 1 February 2013.
  4. "Tritec Motors ceased production". Just Auto. 26 June 2007. Retrieved 1 February 2013.
  5. "13.03.2008 Fiat Powertrain Technologies buys CHRYSLER'S BRAZILIAN ENGINE UNIT". italiaspeed.com. Retrieved 2008-03-13.
  6. "BMW sold Tritec engine joint venture". Moldova. Archived from the original on March 26, 2010. Retrieved November 8, 2009.
  7. Suttie, Alisdair (1 May 2014). "Mini Cooper S (R53): PH Buying Guide". PistonHeads. Retrieved 5 October 2016.