Engineering:Mitsubishi 4M4 engine

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Mitsubishi 4M4 engine
Overview
ManufacturerMitsubishi Motors
Production06/1994-
Layout
ConfigurationStraight-4
Displacement2.8–3.2 L (2,835–3,200 cc)
Cylinder bore95 mm (3.74 in)
98.5 mm (3.88 in)
95 mm (3.74 in)
Piston stroke100 mm (3.94 in)
105 mm (4.13 in)
105 mm (4.13 in)
Block materialCast iron
ValvetrainSOHC, DOHC 4 valves x cyl.
Compression ratio16.0:1-21.0:1
Combustion
Turbocharger
  • TD04 turbo (4M40)
  • TF035 turbo (4M40/4M41)
  • IHI RHV5 variable-geometry turbo (4M41)
  • Intercooler available
Fuel systemZexel Mechanical or Electronically controlled Distributor type injection pump
Denso Common rail direct injection
Fuel typeDiesel
Cooling systemWater-cooled
Output
Power output59–147 kW (80–200 PS)
Torque output198–441 N⋅m (146–325 lb⋅ft)

The Mitsubishi 4M4 engine is a range of four-cylinder diesel piston engines from Mitsubishi Motors, first introduced in the second generation of their Montero/Pajero/Shogun SUVs. They superseded the previous 4D5 engine family, main differences are enlarged displacements and the utilization of one or two over-head camshafts. Originally available only as a 2835 cc intercooled turbo, detail improvements in 1996 and a larger 3.2 litre option in 1999 served to improve power, torque, fuel economy and emissions. The final version has 3.0 litres swept volume and Common rail direct injection.[1]

4M40

Inline 4-cylinder SOHC, bore x stroke = 95 mm × 100 mm (3.74 in × 3.94 in), 2,835 cc (173.0 cu in), swirl combustion chamber

Naturally aspirated

Compression ratio 21.0:1, Zexel Distributor type injection pump, 59 kW (80 PS) at 4000 rpm, 198 N⋅m (146 lb⋅ft) at 2000 rpm

Applications:

  • 1996–1999 Canter (lightest-duty), 69 kW (94 PS), 191 N⋅m (141 lb⋅ft) at 2000 rpm

Intercooled Turbo Gen 1

Compression ratio 21.0:1, 92 kW (125 PS) at 4000 rpm, 294 N⋅m (217 lb⋅ft) at 2000 rpm

Applications:

Intercooled Turbo Gen 2

Compression ratio 21.0:1, Zexel Electronically controlled or Mechanical controlled distributor type Injection Pump, 103 kW (140 PS) at 4000 rpm, 314 N⋅m (232 lb⋅ft) at 2000 rpm

Applications:

4M41

Inline 4-cylinder DOHC 16 valve, Bore x Stroke 98.5 mm × 105 mm (3.88 in × 4.13 in), 3,200 cc (200 cu in)


Intercooled turbo

Compression ratio 17.0:1, Zexel Electronic control type distributor type pump (direct injection inside diesel tube) or Denso Common Rail direct injection, 121 kW (165 PS) at 4000 rpm, 351 N⋅m (259 lb⋅ft) at 2000-3000 rpm

Applications:

Variable geometry intercooled turbo

Compression ratio 17.0:1 or 16.0:1, Denso Common Rail Direct Injection

Applications:

  • 2006–2009 Pajero (fourth generation), 125 kW (170 PS) at 3800 rpm; manual transmission: 118 kW (160 PS), 382 N⋅m (282 lb⋅ft) at 2000 rpm
  • 2010–2022 Pajero (fourth generation), 147 kW (200 PS) at 3800 rpm, 441 N⋅m (325 lb⋅ft) at 2000 rpm

4M42

Inline 4-cylinder DOHC 16 valve, Bore x Stroke 95 mm × 105 mm (3.74 in × 4.13 in), 2,977 cc (181.7 cu in), direct injection

OAT , Applications:

CR , Applications:

See also


References