Toyota AR engine

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Toyota AR engine
Overview
Manufacturer Toyota Motor Corporation
Production 2008-
Combustion chamber
Configuration Straight-4 4-cylinder
Chronology
Predecessor Toyota AZ engine
Toyota S engine

The AR engine family is a straight-4 piston engine series by Toyota, first introduced in 2008 for the RAV4, and subsequently for the Highlander, Venza, Camry and Scion tC

The AR series uses a die-cast aluminium engine block and aluminium DOHC cylinder head. The engine series shares many of the technologies in the AZ engine, while incorporating new features such as variable valve timing on both intake and exhaust camshafts or dual VVT-i, low friction technologies including an offset crankshaft, roller rockers for the valvetrain, a three-stage variable oil pump, reduced-tension piston rings and auxiliary belt drive. An Acoustic Control Induction System switches the length of the intake tract in two stages, based on rpm and throttle angle, thereby ensuring strong torque across a broad engine speed range. New tumble control valves enhances combustion while the engine is cold, and helps to bring the catalytic converters up to working temperature quickly. The Tumble control valves, along with new 12-hole high atomizing long-nozzle fuel injectors, reduce the amount of fuel adhering to the intake ports and therefore maximize fuel economy and reduce harmful emissions.

The cylinder block is an open-deck, midi-skirt type with cast-in iron liners and a die-cast aluminium lower crankcase and a stamped oil pan. The forged steel crankshaft is fully balanced with eight counterweights and supported by five main bearings. A helical gear pressed in No. 3 counterweight drives twin contra-rotating balance shafts in the shaft housing within the lower crankcase.

The AR engine replaces the AZ engine.

1AR-FE

1AR-FE
Overview
Manufacturer Toyota
Combustion chamber
Displacement 2,672 cc (163.1 cu in)
Cylinder bore 90 mm (3.543 in)
Piston stroke 105 mm (4.134 in)
Cylinder block alloy alloy
Cylinder head alloy alloy
Valvetrain DOHC
Compression ratio 10.0
Combustion
Fuel system EFI
Fuel type petrol (gasoline)
Output
Power output 182–187 bhp (136–139 kW)
Torque output 182–186 lb⋅ft (247–252 N⋅m)

A 2.7 L version of the AR family, first released in the Venza[1] and Highlander in late 2008.[2]

Applications:

  • Toyota Venza AGV10/15, 185 PS (136 kW; 182 hp)@5800, 247 N⋅m (182 lbf⋅ft)@4200
  • Toyota Highlander ASU40, 190 PS (140 kW; 187 hp)@5800, 252 N⋅m (186 lbf⋅ft)@4100
  • Toyota Sienna ASU40, 190 PS (140 kW; 187 hp)@5800, 252 N⋅m (186 lbf⋅ft)@4100
  • Lexus RX AGL10, 138 kW (188 PS)@5800, 252 N⋅m (186 lbf⋅ft)@4200

2AR-FE

2AR-FE
Overview
Manufacturer Toyota
Combustion chamber
Displacement 2,494 cc (152.2 cu in)
Cylinder bore 90 mm (3.543 in)
Piston stroke 98 mm (3.858 in)
Cylinder block alloy alloy
Cylinder head alloy alloy
Valvetrain DOHC
Compression ratio 10.4
Combustion
Fuel system EFI
Fuel type petrol (gasoline)
Output
Power output 169–180 bhp (126–134 kW)
Torque output 167–173 lb⋅ft (226–235 N⋅m)

A 2.5 L version of the AR family, first released in the RAV4 in the U.S. and Canada in 2008.[3] This engine also replaced the 2AZ-FE in the U.S. and Canada Camry in early 2009, giving 11% better fuel economy.[4] The engine service mass is 324 lb (147 kg) that includes the oil and coolant fully filled. The engine is used in the U.S., Australia,[5] New Zealand,[6] China, Taiwan, Korea, Malaysia, Thailand[7] and Indonesia.

Applications:

  • Toyota RAV4 (ASA33/38), 181 PS (133 kW; 179 hp)@6000, 233 N⋅m (172 lbf⋅ft)@4000
  • Toyota Camry ASV40 (Base & LE), 171 PS (126 kW; 169 hp)@6000, 226 N⋅m (167 lbf⋅ft)@4100
  • Toyota Camry ASV40 (SE), 181 PS (133 kW; 179 hp)@6000, 232 N⋅m (171 lbf⋅ft)@4100
  • Scion tC (AGT20), 180 hp (130 kW), 173 lb⋅ft (235 N⋅m)
  • Toyota Alphard (AH30)

2AR-FXE

Lua error in package.lua at line 80: module 'strict' not found. The 2AR-FXE [8] is an Atkinson cycle variant of the 2AR-FE. It has the same bore and stroke, but the cams and pistons are unique. Geometrical compression ratio is 12.5:1

The large valve overlap leads to a reduction in cylinder charge and reduced torque and power output, but efficiency is increased. This combination makes the 2AR-FXE suitable for use in hybrid vehicles, where peak torque and power demands can be met by the electric motor and battery.

Maximum output when used in the Camry hybrid is 154 hp with 153 lb·ft of torque which doesn't include the additional power of the electric motor that is used in the Camry Hybrid.

Applications:

2AR-FSE

Lua error in package.lua at line 80: module 'strict' not found. The 2AR-FSE [9] is a variant of the 2AR-FE equipped with D4-S direct-injection and port injection. It has the same bore and stroke as other 2AR engines but the cylinder head, cams, pistons and fuel management system are unique. Thermal efficiency is about 38.5%.[10] The expansion ratio is 13.0 to 1.

Output in the Toyota Crown hybrid is 178 hp (133 kW) at 6000 rpm and 221 N⋅m (163 lbf⋅ft) at 4200–4800 rpm.

Applications:

6AR-FSE

Lua error in package.lua at line 80: module 'strict' not found. The 6AR-FSE is a 4-cylinder, 1998 cc, twincam, petrol engine equipped with D4-S direct fuel injection and VVT-iW. It can work in the Otto cycle and a modified-Atkinson cycle depending on output power. It was first introduced in the Camry in December 2014 for the Chinese market and March 2015 for the Thai market. The output of 6AR-FSE is 123 kW (165 bhp) at 6500 RPM and 199 N⋅m (147 lbf⋅ft) at 4600 RPM.[11] The stroke and bore are 86 mm × 86 mm.

Applications:

8AR-FTS

A 2.0 L turbocharged direct-injected member the AR family, fitted with VVT-iW it is able to operate in both the Otto and a modified-Atkinson cycle. First debuted in the Lexus NX200t.[13] Power output in the 2015 NX200t is 175 kW (235 hp) at 4,800 rpm and 350 N⋅m (258 lb⋅ft) at 1,650 rpm.

Applications:

Production

In Japan built by Toyota Motor Corporation in Kamigo Plant and by Toyota Industries Corporation[18][19] Toyota Motor Manufacturing Alabama, Inc. (TMMAL) will start building the AR 2.5L and 2.7L engines beginning in mid-2011.[20]

GAC Toyota Engine Co.,Ltd Guangqi, China, announced start of AR 2.5L and 2.7L engine production November 2011[21]

Toyota Australia officially opened its new engine plant producing both petrol and hybrid engine variants in Melbourne. [22]

See also

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
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  8. ↑ http://toyota.jp/pages/contents/harrier/003_p_003/pdf/spec/harrier_spec_201506.pdf
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
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  20. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  21. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  22. ↑ Lua error in package.lua at line 80: module 'strict' not found.
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