Toyota AZ engine
Encyclopedia
The Toyota AZ engine family is a straight-4
piston engine series. The AZ series uses an aluminium engine block with cast iron cylinder liners and aluminium DOHC cylinder heads. The engine series features many advanced technologies including slant-squish combustion chambers,
offset cylinder and crank centers, and the VVT-i
continuously variable intake valve timing system. The aluminium engine measures 626 mm (25-in) long, 608 mm (24-in) wide, and 681 mm (27-in) tall.
The cylinder block is an open-deck, midi-skirt die-cast aluminium 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 dual overhead camshafts are driven by a single-stage roller chain of 8.0 mm (0.3-in) pitch, enabling a narrow included valve angle of 27.5°. The camshafts act on four valves per cylinder via bucket tappets. As in the recent Toyota engine practice, no clearance adjusting shim is employed. Valve diameters are 34.0 mm (1.3 in) for intake and 29.5 mm (1.2 in) for exhaust, with 8.0 mm (0.3-in) lift for both intake and exhaust. The four-vane VVT-i device is fitted on the intake camshaft, altering timing by 50°. The valve cover is made of magnesium to save weight.
Fuel is injected sequentially via an ultra-fine-atomization injector with twelve small injection holes, each 0.18 mm (0.01 in) in diameter. As in the smaller NZ engine, the new AZ adopts a plastic, built-up, and vibration-welded intake manifold integrating a large volume plenum chamber (3.5 L (214 in3) volume including a 1.3 L (79 in3) resonator). Exhaust manifolds are of tubular construction with integrated catalytic converters.
The AZ is the replacement for the S engine. It will eventually be replaced by the AR engine
.
The 1AZ has a total displacement of 1998 cm³ with 86.0 mm (3.39 in) bore and 86.0 mm (3.39 in) stroke, and a compression ratio of 9.6:1.
Applications:
system.
Applications:
in the USA, obtains a total displacement of 2362 cm³ with 88.5 mm (3.5 in) bore and 96.0 mm (3.8 in) stroke, with a compression ratio of 9.6:1. Output is 157 hp at 5600 rpm with 162 ft·lbf (220 N·m) of torque at 4000 rpm.
Later versions of the 2AZ-FE engine were upgraded with 9.8:1 compression ratio, a slightly more aggressive intake cam profile, 6500 rpm red line, and piston oil squirters. These later versions are rated at 161 hp in the Scion tC, 166 hp in the Rav4, and 158 hp in the Camry, Corolla XRS, and Scion xB.
A TRD
supercharger was available for the Scion tC until Spring 2009.
Applications:
variant of the 2AZ-FE. It has the same bore and stroke, but the cams and pistons are unique. It has a physical compression ratio
of 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 2AZ-FXE suitable for use in hybrid vehicle
s, where peak torque and power demands can be met by the electric motor
and battery
.
Maximum output when used in the Camry hybrid is 147 hp (108 kW) at 6000 rpm with 138 ft·lbf (187 N·m) of torque at 4400 rpm.
Applications:
Straight-4
The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....
piston engine series. The AZ series uses an aluminium engine block with cast iron cylinder liners and aluminium DOHC cylinder heads. The engine series features many advanced technologies including slant-squish combustion chambers,
offset cylinder and crank centers, and the VVT-i
VVT-i
VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing technology developed by Toyota, similar in performance to the BMW's VANOS. The Toyota VVT-i system replaces the Toyota VVT offered starting in 24 December 1991 on the 5-valve per cylinder 4A-GE engine. The...
continuously variable intake valve timing system. The aluminium engine measures 626 mm (25-in) long, 608 mm (24-in) wide, and 681 mm (27-in) tall.
The cylinder block is an open-deck, midi-skirt die-cast aluminium 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 dual overhead camshafts are driven by a single-stage roller chain of 8.0 mm (0.3-in) pitch, enabling a narrow included valve angle of 27.5°. The camshafts act on four valves per cylinder via bucket tappets. As in the recent Toyota engine practice, no clearance adjusting shim is employed. Valve diameters are 34.0 mm (1.3 in) for intake and 29.5 mm (1.2 in) for exhaust, with 8.0 mm (0.3-in) lift for both intake and exhaust. The four-vane VVT-i device is fitted on the intake camshaft, altering timing by 50°. The valve cover is made of magnesium to save weight.
Fuel is injected sequentially via an ultra-fine-atomization injector with twelve small injection holes, each 0.18 mm (0.01 in) in diameter. As in the smaller NZ engine, the new AZ adopts a plastic, built-up, and vibration-welded intake manifold integrating a large volume plenum chamber (3.5 L (214 in3) volume including a 1.3 L (79 in3) resonator). Exhaust manifolds are of tubular construction with integrated catalytic converters.
The AZ is the replacement for the S engine. It will eventually be replaced by the AR engine
Toyota AR 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, and Camry.The AR series uses a die-cast aluminium engine block and aluminium DOHC cylinder head...
.
1AZ-FE
The 1AZ-FE is a 2.0 L (1998 cc) version. Output is 108 kW at 6000 rpm with 190 newton metre of torque at 4000 rpm for the Camry Aurion version. Rav4 engines were rated at 148 hp at 6000 rpm and 142 lbft of torque at 4000 rpm.The 1AZ has a total displacement of 1998 cm³ with 86.0 mm (3.39 in) bore and 86.0 mm (3.39 in) stroke, and a compression ratio of 9.6:1.
Applications:
- 2006–2009 Toyota CamryToyota CamryThe Toyota Camry is a series of mid-size automobiles manufactured by Toyota since 1982, and sold in the majority of automotive markets throughout the world...
(AurionToyota AurionThe Toyota Aurion is a mid-size car produced by Toyota in Australia and parts of Asia since 2006. The Aurion, given the model designation XV40 is essentially a Toyota Camry with revised front- and rear-end treatment, along with changes to the interior...
version) - 2001–2003 Toyota Rav4Toyota RAV4The Toyota RAV4 is a compact crossover SUV from Toyota. It was the first compact crossover SUV, introduced in Japan and Europe in 1994 and beginning sales in North America in 1996...
1AZ-FSE
The 1AZ-FSE is a 2.0 L (1998 cc) version. Bore is 86.0 mm and stroke is 86.0 mm, and a compression ratio of 10.5:1. Output is 155 hp (114 kW) at 6000 rpm with 145 ft·lbf (192 N·m) of torque at 4000 rpm. The 1AZ-FSE features Toyota's D-4 direct injectionGasoline direct injection
In internal combustion engines, gasoline direct injection , also known as petrol direct injection or direct petrol injection, is a variant of fuel injection employed in modern two-stroke and four-stroke gasoline engines...
system.
Applications:
- Toyota AvensisToyota AvensisThe Toyota Avensis is a large family car built in Derbyshire, United Kingdom by Japanese carmaker Toyota since 1997. It is the direct successor to the Carina E and is available as a four-door saloon, five-door liftback and estate...
- Toyota Avensis Verso
- Toyota Noah/VoxyToyota NoahThe Toyota Noah is an eight-seater MPV with two rear sliding doors built by Toyota Motor Company and sold only in Asia. A five-seater version without the third seat row is available . Its predecessor was the Toyota Liteace Noah...
- Toyota RAV4Toyota RAV4The Toyota RAV4 is a compact crossover SUV from Toyota. It was the first compact crossover SUV, introduced in Japan and Europe in 1994 and beginning sales in North America in 1996...
- Toyota GaiaToyota GaiaThe Toyota Gaia is a Japanese market MPV that competes with the Nissan Prairie and the Honda Shuttle. It was replaced by the Toyota Isis. The Gaia shares a platform with the Toyota Ipsum and Toyota Corona Premio...
- Toyota IsisToyota IsisThe Toyota Isis is a seven-seat large MPV manufactured by Kanto Auto Works under contract for Japanese automaker Toyota. It is sold only in Japan and was launched in September 2004. It features sliding doors and is available with either front or four-wheel drive and straight-4 1.8 and 2.0-litre...
- Toyota CaldinaToyota CaldinaThe Toyota Caldina is an automobile manufactured by Toyota for the Japanese market and was released in 1992. It replaced the Toyota Carina Surf....
- Toyota WishToyota WISHThe Toyota WISH is a Compact MPV produced by Japanese automaker Toyota since 2003. It is available as a six and seven-seater, equipped with either a 1.8 or 2.0-litre gasoline engine...
- Toyota AllionToyota AllionThe Toyota Allion is a compact sedan sold in Japan by Toyota as designated by Japanese regulations concerning exterior dimensions and engine displacement. The Toyota Allion has a lot of space for the people sitting in the back-seats...
- Toyota PremioToyota PremioThe Toyota Premio is a compact sedan sold in Japan by Toyota as designated by Japanese regulations concerning exterior dimensions and engine displacement....
- Toyota OpaToyota OpaThe Opa was the result of the V50 series Vista Ardeo wagon modified into a 5-door hatchback. The transmission shifter was relocated from the floor between the front seats to a location on the lower portion of the dashboard, allowing passengers to walk to the rear area from either front seat...
2AZ-FE
The 2AZ-FE is a 2.4 L (2362 cc) version built in Japan and at TMMKToyota Motor Manufacturing Kentucky
Toyota Motor Manufacturing Kentucky, Inc. is an automobile manufacturing factory in Georgetown, Kentucky, USA. It is part of Toyota Motor Engineering & Manufacturing North America , owned by Toyota Motor Company of Japan....
in the USA, obtains a total displacement of 2362 cm³ with 88.5 mm (3.5 in) bore and 96.0 mm (3.8 in) stroke, with a compression ratio of 9.6:1. Output is 157 hp at 5600 rpm with 162 ft·lbf (220 N·m) of torque at 4000 rpm.
Later versions of the 2AZ-FE engine were upgraded with 9.8:1 compression ratio, a slightly more aggressive intake cam profile, 6500 rpm red line, and piston oil squirters. These later versions are rated at 161 hp in the Scion tC, 166 hp in the Rav4, and 158 hp in the Camry, Corolla XRS, and Scion xB.
A TRD
Toyota Racing Development
Toyota Racing Development or TRD is the in-house tuning shop for all Toyota, Lexus, and Scion cars. TRD is responsible both for improving street cars for more performance and supporting Toyota's racing interests around the world. TRD produces various tuning products and accessories, including...
supercharger was available for the Scion tC until Spring 2009.
Applications:
- 2002–2009 Toyota CamryToyota CamryThe Toyota Camry is a series of mid-size automobiles manufactured by Toyota since 1982, and sold in the majority of automotive markets throughout the world...
- 2009–2011 Toyota MatrixToyota MatrixThe Toyota Matrix, sometimes officially referred to as the Toyota Corolla Matrix, is a compact hatchback manufactured by the Toyota Motor Corporation in Canada, to be sold in the United States, Canada, and Mexico...
- 2009–2010 Pontiac VibePontiac VibeThe Pontiac Vibe is a compact hatchback car that was produced in Fremont, California, in the United States by NUMMI , a joint venture between General Motors and Toyota, and marketed under General Motors' Pontiac brand...
- 2009–2011 Toyota CorollaToyota CorollaThe Toyota Corolla is a line of subcompact and compact cars manufactured by the Japanese automaker Toyota, which has become very popular throughout the world since the nameplate was first introduced in 1966. In 1997, the Corolla became the best selling nameplate in the world, with over 35 million...
XRS - 2002–2009 Toyota Camry SolaraToyota Camry SolaraThis page is about the automobile manufactured by Toyota. For other uses, see Solara The Toyota Camry Solara, also more commonly known as the Toyota Solara, is a mid-size coupe/convertible designed and engineered by Toyota...
- 2004–2008 Toyota RAV4Toyota RAV4The Toyota RAV4 is a compact crossover SUV from Toyota. It was the first compact crossover SUV, introduced in Japan and Europe in 1994 and beginning sales in North America in 1996...
- 2001–2008 Toyota Highlander/Kluger/Harrier
- Toyota Estima / Toyota PreviaToyota PreviaThe Toyota Previa, also known as the Toyota Estima in Japan and the Toyota Tarago in Australia, is an MPV or multi-purpose vehicle produced by Toyota Motor Corporation since 1990...
/ Toyota TaragoToyota TaragoThe Toyota Tarago is a people mover developed and manufactured by the Toyota Motor Corporation. It has been the most popular people mover for 3 decades now and continues to be the highest seller in Australia.... - Toyota AlphardToyota AlphardThe Toyota Alphard is a luxury MPV produced by the Japanese automaker Toyota since 2002. It is available as a seven or eight-seater with 2.4 and 3.0 litre gasoline engines in 3 different model lines - Alphard G, Alphard V, and the Alphard Hybrid, which uses the 2.4 litre engine along with an...
- Toyota Blade
- Toyota AvensisToyota AvensisThe Toyota Avensis is a large family car built in Derbyshire, United Kingdom by Japanese carmaker Toyota since 1997. It is the direct successor to the Carina E and is available as a four-door saloon, five-door liftback and estate...
- 2005–2010 Scion tCScion tCThe Scion tC is an automobile manufactured and sold by Scion, a division of Toyota. Introduced in the United States in June 2004 and Canada in 2010. The name tC does not fit in with its stablemates the xA, xB, and xD, because the name XC designation has already been used by Volvo for its lineup of...
- 2008–2012 Scion xBScion xBThe Scion xB is a vehicle made by Toyota for the United States market and sold under their youth-oriented Scion brand. It is a box-shaped, 5-door compact hatchback.-First generation :...
2AZ-FXE
The 2AZ-FXE is an Atkinson cycleAtkinson cycle
The Atkinson cycle engine is a type of internal combustion engine invented by James Atkinson in 1882. The Atkinson cycle is designed to provide efficiency at the expense of power density, and is used in some modern hybrid electric applications.-Design:...
variant of the 2AZ-FE. It has the same bore and stroke, but the cams and pistons are unique. It has a physical compression ratio
Compression ratio
The 'compression ratio' of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity...
of 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 2AZ-FXE suitable for use in hybrid vehicle
Hybrid vehicle
A hybrid vehicle is a vehicle that uses two or more distinct power sources to move the vehicle. The term most commonly refers to hybrid electric vehicles , which combine an internal combustion engine and one or more electric motors.-Power:...
s, where peak torque and power demands can be met by the electric motor
Electric motor
An electric motor converts electrical energy into mechanical energy.Most electric motors operate through the interaction of magnetic fields and current-carrying conductors to generate force...
and battery
Battery (electricity)
An electrical battery is one or more electrochemical cells that convert stored chemical energy into electrical energy. Since the invention of the first battery in 1800 by Alessandro Volta and especially since the technically improved Daniell cell in 1836, batteries have become a common power...
.
Maximum output when used in the Camry hybrid is 147 hp (108 kW) at 6000 rpm with 138 ft·lbf (187 N·m) of torque at 4400 rpm.
Applications:
- Toyota AlphardToyota AlphardThe Toyota Alphard is a luxury MPV produced by the Japanese automaker Toyota since 2002. It is available as a seven or eight-seater with 2.4 and 3.0 litre gasoline engines in 3 different model lines - Alphard G, Alphard V, and the Alphard Hybrid, which uses the 2.4 litre engine along with an...
Hybrid - Toyota Estima Hybrid
- 2007–2010 Toyota Camry Hybrid ACV40
- 2011– Toyota Camry Hybrid AVV50
- 2009– Lexus HS 250h
- 2009– Toyota SaiToyota SaiThe Toyota Sai is a sister model sharing the same platform and hybrid drivetrain with Lexus HS. It was launched in Japan on October 20, 2009. Toyota received about 14,000 orders in one month after its introduction. It is a hybrid....