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

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The AR series uses a die-castaluminium 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[edit]

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) at 5800 rpm, 247 N⋅m (182 lbf⋅ft) at 4200 rpm
• Toyota Highlander ASU40, 190 PS (140 kW; 187 hp) at 5800 rpm, 252 N⋅m (186 lbf⋅ft) at 4100 rpm
• Toyota Sienna ASU40, 190 PS (140 kW; 187 hp) at 5800 rpm, 252 N⋅m (186 lbf⋅ft) at 4100 rpm
• Lexus RX AGL10, 138 kW (188 PS) at 5800 rpm, 252 N⋅m (186 lbf⋅ft) at 4200 rpm

2AR-FE[edit]

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, Philippines, Thailand^[7] and Indonesia.

Applications:

• Toyota RAV4 (ASA33/38), 181 PS (133 kW; 179 hp) at 6000 rpm, 233 N⋅m (172 lbf⋅ft) at 4000 rpm.
• Toyota Camry ASV40 (Base & LE), 171 PS (126 kW; 169 hp) at 6000 rpm, 226 N⋅m (167 lbf⋅ft) at 4100 rpm
• Toyota Camry ASV40 (SE and worldwide) 181 PS (133 kW; 179 hp) at 6000 rpm, 233 N⋅m (172 lbf⋅ft) at 4100 rpm.
• Toyota Camry ASV50, 180 PS (132 kW; 178 hp) at 6000 rpm, 233 N⋅m (172 lbf⋅ft) at 4100 rpm * Include the Flexifuel Version (2AR-FBE)
• Scion tC (AGT20), 180 hp (130 kW), 173 lb⋅ft (235 N⋅m)
• Toyota Alphard (AH30)
• Lexus ES250 (XV60)

2AR-FXE[edit]

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. Only the intake valves are variable with VVT-i.^[9] Geometrical compression ratio is 12.5:1

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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 of the engine when used in the Camry hybrid is 154 hp with 153 lb·ft of torque.

Applications:

• Toyota Camry Hybrid (XV50)
• Toyota Avalon Hybrid (XX40)
• Toyota Harrier Hybrid (XU60)
• Lexus NX 300h (AZ10)
• Toyota Alphard/Vellfire Hybrid/Crown Vellfire (AH30)
• Lexus ES 300h (XV60)
• Toyota RAV4 Hybrid (XA40)
• Lexus LM 300h (AH30)

2AR-FSE[edit]

The 2AR-FSE^[10] 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.Maximum thermal efficiency is about 38.5%.^[11] The expansion ratio is 13.0 to 1.

Output in the Toyota Crown hybrid combined is 208 hp (155 kW) at 6000 rpm and 221 N⋅m (163 lbf⋅ft) at 4200–4800 rpm.

Applications:

5AR-FE[edit]

A 2.5 L version of the AR family, first released in the RAV4 in China in 2013.^[13]

Applications:

6AR-FSE[edit]

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.^[14] The stroke and bore are 86 mm × 86 mm (3.4 in × 3.4 in).

Applications:

• Camry 2.0 (XV50, Russia, China, Thailand)
• Camry 2.0 (XV70, China,2017-2018)
• Camry 2.0 (XV70, Myanmar, Vietnam, Cambodia, Kazakhstan)
• Lexus ES 200 (XV60)^[15]

6AR-FBS[edit]

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The 6AR-FBS 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 October 2018 for the Thai market.The output is 167 PS (123 kW; 165 bhp) at 6500 RPM and 199 N⋅m (147 lbf⋅ft) at 4600 RPM.^[16]

Applications:

• Camry 2.0 (XV70, Russia, Thailand, Singapore, China)

8AR-FTS[edit]

A 2.0 L turbochargeddirect-injected member of the AR family, fitted with VVT-iW it is able to operate in both the Otto and a modified-Atkinson cycle. Debuted in the Lexus NX200t.^[17] Power output in the 2015 NX200t is 175 kW (235 hp) at 4,800 - 5,600 rpm and 350 N⋅m (258 lb⋅ft) at 1,650 - 4000 rpm. The 8AR-FTS engine has Lexus’ ESTEC D-4ST (Economy with Superior Thermal Efficient Combustion Direct injection 4-stroke with Turbo) fuel injection. With separate twin injectors for both direct and port injection, ESTEC D-4ST could perform high-pressure direct injection into the cylinder and conventional intake port injection, or direct cylinder injection only, according to engine speed.^[18] Power output in some applications, e.g. Lexus IS 200t XE30, Lexus GS 200t and Lexus RC 200t is bumped up by 5 kW (6.7 hp) up to 180 kW (242 hp) in the same rev range but torque remains the same.^[18]

Applications:

• Lexus NX 200t (renamed NX 300) AGZ10/15
• Lexus IS 200t (renamed IS 300) ASE30^[19]
• Lexus GS 200t (renamed GS 300) ARL10^[20]
• Lexus RX 200t (renamed RX 300) AGL20/25^[21]
• Toyota Crown ARS210/ARS220^[22]
• Lexus RC 200t (renamed RC 300) ASC10
• Toyota Highlander (XU50, China)
• Toyota Harrier Turbo (XU60, Japan, 2017–2020) ASU60^[23]

Production[edit]

In Japan built by Toyota Motor Corporation in Kamigo Plant and by Toyota Industries Corporation.^[24][25]Toyota Motor Manufacturing Alabama, Inc. (TMMAL) started building the AR 2.5L and 2.7L engines beginning in mid-2011.^[26]

GAC Toyota Engine Co.,Ltd Guangqi, China, announced start of AR 2.5L and 2.7L engine production November 2011^[27]

Toyota Australia officially opened its new engine plant producing both petrol and hybrid engine variants in Melbourne.^[28]

See also[edit]

References[edit]

1. ^'2009 Venza Product Information' (Press release). USA: Toyota. 2008-11-03. Retrieved 2013-05-24.
2. ^'2009 Highlander Product Information' (Press release). USA: Toyota. 2008-09-11. Retrieved 2013-05-24.
3. ^'2009 RAV4 Product Information' (Press release). USA: Toyota. 2008-09-11. Retrieved 2013-05-24.
4. ^Madelin, Jacqui (2012-02-26). 'Camry: Toyota eyes fleet buyers'. NZ Herald News. Retrieved 2013-05-24.
5. ^'Toyota Camry homepage'. Australia: Toyota. Retrieved 2013-05-24.
6. ^'Camry - Are you an Executive of Life?'. New Zealand: Toyota. Archived from the original on 2013-02-09. Retrieved 2013-05-24.
7. ^'ข้อมูลทางเทคนิค - New Camry' [Technical - New Camry] (in Thai). Thailand: Toyota. Archived from the original on 2012-06-01. Retrieved 2013-05-24.
8. ^'トヨタ ハリアー 主要諸元' [Toyota Harrier ー Main specifications] (PDF) (in Japanese). Japan: Toyota. Retrieved 2020-03-28.
9. ^'Toyota RAV4 Technical Specifications'(PDF) (Press release). UK: Toyota. Retrieved 2020-03-28.
10. ^Lithgow, Ian. '2AR-FSE Lexus engine'. australiancar.reviews. Retrieved 2015-08-28.
11. ^'Lexus begins sales of new IS 300h hybrid in Japan along with new IS lineup'. Green Car Congress. 2013-05-16. Retrieved 2015-05-03.
12. ^'Toyota Global Site | Vehicle Gallery | Camry'. Toyota. Retrieved 2017-11-16.
13. ^'【图】途观/CR-V的天敌 抢先实拍全新国产RAV4_RAV4荣放_汽车之家' [[Figure] Tiguan / CR-V's natural enemies first shot real new domestic RAV4_RAV4 Rong _Car House] (in Chinese). China. 2013-08-26. Retrieved 2017-11-16.
14. ^'New Camry'(PDF) (Brochure). Malaysia: Toyota. October 2015. Archived from the original(PDF) on 2016-03-04. Retrieved 2016-01-12.
15. ^Lee, Jonathan (2015-04-20). 'Shanghai 2015: Lexus ES facelift unveiled, new 2.0 mill'. PaulTan.org. Retrieved 2015-04-21.
16. ^Lye, Gerard (2018-10-30). '2018 Toyota Camry launched in Thailand - four variants, including hybrids; priced from 1.445 mil baht'. paultan.org. Malaysia. Retrieved 2018-11-02.
17. ^'LEXUS、コンパクトクロスオーバーSUV「NX」をワールドプレミア' [Lexus, world premiere of the compact crossover SUV 'NX'] (Press release). Japan: Toyota. 2014-04-20. Retrieved 2014-06-22.
18. ^ ^ab'8AR-FTS Toyota engine'. australiancar.reviews. Retrieved 2016-07-02.
19. ^Goreham, John (2014-08-01). 'Upcoming Lexus IS 200t will be more than 1 second faster to 60 MPH'. Torque News. United Kingdom. Retrieved 2015-04-16.
20. ^'Mingling with the Classics: Lexus Introduces 2016 GS During Pebble Beach Concours Celebrations' (Press release). US: Toyota. 2015-08-13. Retrieved 2015-08-22.
21. ^Tan, Paul (2015-04-20). 'Shanghai 2015: Lexus RX 200t replaces the old RX 270'. PaulTan.org. Malaysia. Retrieved 2015-04-20.
22. ^Radu, Mihnea (2015-10-02). 'Toyota Crown Gets 2-Liter Turbo Engine, Upgraded Suspension in Japan'. www.autoevolution.com. Retrieved 2015-10-24.
23. ^'Harrier equipped with Turbo Engine'. Japan. 2017-07-20. Retrieved 2017-07-20.
24. ^'General Status of Plants in Japan | Kamigo Plant' (Press release). Toyota. 2012. Retrieved 2013-05-25.
25. ^'Engines for Passenger Cars'. Japan: Toyota Industries. Retrieved 2013-05-25.
26. ^'TMC's Alabama, U.S.A. Plant to Build 4-cylinder Engines' (Press release). Japan: Toyota. 2009-08-21. Retrieved 2013-05-25.
27. ^中国の広汽トヨタエンジン工場で新型エンジンの生産開始 [Start of production of the new Toyota engine, in Guangqi Toyota engine plant in China] (Press release) (in Japanese). Japan: Toyota. 2011-11-09. Retrieved 2013-05-25.
28. ^'Toyota Unveils New Engine Plant'. Australia: Toyota Australia. Retrieved 2013-08-16.