- Mitsubishi 4B1 engine
4B1 Manufacturer Mitsubishi Motors Also called GEMA "World Engine" Production 2005–present Predecessor Mitsubishi 4G6 engine Cylinder block alloy Aluminium die cast Cylinder head alloy Aluminium die cast Valvetrain Direct acting DOHC, 16 valves, continuously variable MIVEC intake and exhaust valve timing
The Mitsubishi 4B1 engine is a range of all-alloy straight-4 engines built at Mitsubishi's Japanese "World Engine" powertrain plant in Shiga on the basis of the Global Engine Manufacturing Alliance (GEMA). Although the basic designs of the various engines are the same, their exact specifications are individually tailored for each partner (Chrysler, Mitsubishi, and Hyundai). The cylinder block and other basic structural parts of the engine were jointly developed by the GEMA companies, but the intake and exhaust manifolds, the cylinder head’s intake and exhaust ports, and other elements related to engine tuning were independently developed by Mitsubishi.
All engines developed within this family have aluminium cylinder block and head, four valves per cylinder, double overhead camshaft layouts, and MIVEC continuous variable valve timing. The 4B1 engine family is the first to have the continuously variable valve timing MIVEC system applied not only to its intake valves but also to its exhaust valves. The intake and exhaust cam timing is continuously independently controlled and provide four optimized engine operating modes.
Engine type Inline 4 cylinder DOHC 16v, MIVEC Displacement 1.8 L (1,798 cc) Bore 86 mm Stroke 77.4 mm Compression ratio 10.5:1 Fuel system ECI multiple Peak power 103-105 kW (140-143 PS) at 6,000 rpm Peak torque 177 N.m (130 ft.lbf) at 4,250 rpm
Engine type Inline 4 cylinder DOHC 16v, MIVEC Displacement 2.0 L (1,998 cc) Bore 86 mm Stroke 86 mm Compression ratio 10:1 Fuel system ECI multiple Peak power 108-114 kW (147-155 PS) at 6,000 rpm Peak torque 198 N·m (146 ft·lbf) at 4,250 rpm
- 2007 Mitsubishi Lancer
- 2009 Mitsubishi Outlander (Facelift Europe)
- 2010 Mitsubishi ASX
- 2010 Proton Inspira 2.0P
The engines's bore and stroke both measure 86.0 mm, which engineers refer to as square. According to Mitsubishi, the new cylinder dimensions contribute to a free-revving character (max power at 6,500 rpm, redline at 8,000 rpm), linear power delivery and wide torque curve. Mitsubishi used a timing chain instead of a belt for better reliability and iridium spark plugs to lower emissions and to help extend major service intervals for lower cost of ownership. To reduce weight, Mitsubishi used a plastic cam cover and intake manifold and double-layer stainless steel exhaust manifold. The exhaust manifold has a rear location on the transverse engine, compared to the front location for the previous engine, yielding important benefits such as better emissions performance. To lower vibration, Mitsubishi used a 4-point inertial axis system with cylindrical hydraulic engine mounts on the left and right sides. A lightweight, high-rigidity squeeze-cast aluminium bracket on the right side mount (engine side) lowers engine noise under acceleration. A lightweight, high-rigidity steel plate bracket on the left side mount (transmission side) lowers gear noise. A custom-tuned insulator was developed for the front and rear mounts to help control both idle vibration and acceleration shock.
Engine type Inline 4 cylinder DOHC 16v, Turbo MIVEC Displacement 2.0 L (1,998 cc) Bore 86 mm Stroke 86 mm Compression ratio 9:1 Fuel system ECI multiple Peak power 206 kW (280 PS) at 6,500 rpm (Japanese market)
217 kW (291 PS) at 6,500 rpm (US market)
177 kW (240 PS) (Lancer Ralliart)
217 kW (295 PS) at 6,500 rpm (European market)
Peak torque 422 N·m (311 ft·lbf) at 3,500 rpm (Japanese market)
407 N·m (300 ft·lbf) at 4,400 rpm (US market)
343 N·m from 2,500 to 4,725 rpm (353 N·m at 3,000 rpm) (Lancer Ralliart)
366 N·m at 3,500 rpm (European market)
The 4B11T is the first engine in the Lancer Evolution series that uses a die-cast aluminium cylinder block versus the cast-iron block used in the previous turbocharged 4G63 engine that powered all previous models. The engine weight has been reduced by 12 kg (26 lb) compared to the 4G63, even with the addition of a timing chain instead of a belt and MIVEC continuous variable valve timing on both the intake and exhaust camshafts (the 4G63 had MIVEC valve timing & lift switching type on the intake only). A revised turbocharger offers up to 20-percent quicker response at lower engine speeds compared to previous 4G63. The 4B11T offers a broader torque curve, producing more torque than the 4G63 at all engine speeds, helped by the engine's square bore and stroke design (both measure 86.0 mm). Redline starts at 7,000 rpm, with a fuel cutout at 7,600 rpm to protect the engine.
A semi-closed deck structure, an integrated ladder frame and four-bolt main bearing caps contribute to engine strength, durability and lower NVH levels. Unlike the 4G63, the 4B11T does not use a balancer shaft. The semi-floating pistons of the 4G63 have been replaced with a fully floating pistons for the 4B11T. Aluminium is also used for the timing chain case and cylinder head cover. The engine features an electronically controlled throttle, an isometric short port aluminium intake manifold and the stainless steel exhaust manifold is positioned at the rear of the engine. The use of a direct-acting valvetrain eliminates the need of the roller rocker arm configuration previously used in the 4G63. The 4B11T features built-up hollow camshafts and its valve stem seals are integrated with the spring seats. The internal components of the 4B11T engine have been reinforced to withstand high levels of boost.
Engine type Inline 4 cylinder DOHC 16v, MIVEC Displacement 2.4 L (2,359 cc) Bore 88 mm Stroke 97 mm Compression ratio 10.5:1 Fuel system ECI multiple Peak power 125 kW (170 PS) at 6,000 rpm Peak torque 232 N·m (171 ft·lbf) at 4,100 rpm
- 2005 Mitsubishi Outlander
- 2005 Mitsubishi Lancer Ralliart
- 2004 Mitsubishi Grandis
- 2007 Mitsubishi Delica
- 2008 Mitsubishi Lancer
- 2008 Citroën C-Crosser
- 2008 Peugeot 4007
- 2009 Mitsubishi Lancer Sportback GTS
The cylinder head intake and exhaust ports and intake and exhaust manifolds are shape optimized for better volumetric efficiency. Mitsubishi lowered the friction of the engine by including elastic grinding of the valve stems, adopting a high-efficiency shroud equipped plastic impeller in the water pump and using 0W-20 low-viscosity oil. Mitsubishi increased the combustion efficiency by optimizing the design of the cylinder head intake and exhaust ports, by incorporating the MIVEC system on both intake and exhaust valves and by using injectors that give an ultra micro droplet fuel spray. To lower the engine's weight, Mitsubishi used die-cast aluminium for the cylinder block, plastic for the cylinder head cover and intake manifold, and stainless steel for the exhaust manifold. The engine features a compact balancer shaft module with an integrated oil pump. A silent chain is used to drive the camshafts. The compact balancer module, the silent chain, the stable combustion yielded by the intake and exhaust MIVEC system, and high rigidity designs for the cylinder head and cylinder block realize low vibration and noise.
- List of Mitsubishi engines
- ^ a b c d "Newly Developed Four-Cylinder MIVEC Engine", Masato TOJO, Akihito KUBO, .pdf file, Mitsubishi Motors technical review
- ^ "Mitsubishi Motors Makes Shiga Plant Japanese Production Facility of World Engine", Mitsubishi Motors website
- ^ "DaimlerChrysler, Hyundai, and Mitsubishi Motors to Form Global Engine Alliance", Mitsubishi Motors website
- ^ a b "All-New 2008 Mitsubishi Lancer Delivers Driven-To-Thrill Performance from New 152-HP Engine and Optional CVT", Mitsubishi Motors North America press release
- ^ "LANCER Evolution X GSR", Mitsubishi Motors official website, August 26, 2007
- ^ a b c "All-New 2008 Lancer Evolution Debuts All-New Aluminium Turbocharged/Intercooled Engine", Mitsubishi Motors North America website, November 14, 2007
Engines Platforms Technologies
Wikimedia Foundation. 2010.
Look at other dictionaries:
Mitsubishi KE engine — Manufacturer Mitsubishi Motors Production 1963–? Cylinder block alloy Iron Cylinder head alloy Iron The Mitsubishi KE engine is a range of engines produced by Mitsubishi Motors during the 1960s and … Wikipedia
Mitsubishi 6G7 engine — 6G7 Manufacturer Mitsubishi Motors Also called Cyclone V6 Cylinder block alloy … Wikipedia
Mitsubishi 4N1 engine — 4N1 Manufacturer Mitsubishi Motors Production 2010–present Cylinder block alloy Aluminium die cast Cylinder head alloy Aluminium die cast Valvetrain DOHC, 16 … Wikipedia
Mitsubishi 6A1 engine — 6A1 Manufacturer Mitsubishi Motors Production 1992–present Cylinder block alloy … Wikipedia
Mitsubishi 4A9 engine — 4A9 Manufacturer MDC Power Production 2004–present Predecessor Mitsubishi 4G1 engine Cylinder block alloy Aluminum die cast Cylinder head alloy Aluminum die cast … Wikipedia
Mitsubishi Vulcan engine — 2G2 Manufacturer Mitsubishi Motors Also called Vulcan Production 1972–1989 Predecessor Mitsubishi 2G1 engine Successor Mitsubishi 3G8 engine The Mitsubishi Vulcan engine, identified by … Wikipedia
Mitsubishi 3B2 engine — 3B2 Manufacturer Mitsubishi Motors Production 2005–present Predecessor Mitsubishi … Wikipedia
Mitsubishi 6B3 engine — 6B3 Manufacturer Mitsubishi Motors Production 2005–present Predecessor Mitsubishi 6G7 engine … Wikipedia
Mitsubishi 3G8 engine — 3G8 Manufacturer Mitsubishi Motors Production 1987–present Cylinder block alloy Cast iron … Wikipedia
Mitsubishi 4G9 engine — 4G9 Manufacturer Mitsubishi Motors Production 1991 2007 Cylinder block alloy … Wikipedia