Toyota SZ engine
Reciprocating internal combustion engine From Wikipedia, the free encyclopedia
The Toyota SZ engine family is a series of straight-4 piston engines with a forward-facing exhaust.[1] Toyota Motor Manufacturing (UK) in Deeside produces SZ engines for the Yaris.[2] All three types of the SZ engine are built in Tianjin FAW Toyota Engine Co., Ltd. (TFTE) Plant No. 1 in Xiqing District, Tianjin, China.[3][4] The 2SZ-FE and 3SZ-FE variations are also manufactured by PT Astra Daihatsu Motor's Karawang Engine Plant in Indonesia.[5][6][7]
| Toyota SZ engine | |
|---|---|
1SZ-FE engine | |
| Overview | |
| Manufacturer | Toyota, Daihatsu[1] |
| Production | 1999–present |
| Layout | |
| Configuration | Naturally aspirated straight-4 |
| Displacement | 1.0 L (997 cc) 1.3 L (1,298 cc) 1.5 L (1,495 cc) |
| Cylinder bore | 69 mm (2.72 in) 72 mm (2.83 in) |
| Piston stroke | 66.7 mm (2.63 in) 79.6 mm (3.13 in) 91.8 mm (3.61 in) |
| Cylinder block material | Cast-iron |
| Valvetrain | DOHC 4 valves x cyl. with VVT-i |
| Compression ratio | 10.0:1, 11.0:1 |
| RPM range | |
| Max. engine speed | 6500 |
| Combustion | |
| Fuel system | Electronic fuel injection Direct injection |
| Fuel type | Petrol |
| Cooling system | Water-cooled |
| Output | |
| Power output | 51.5–80 kW (69.1–107.3 hp; 70.0–108.8 PS) |
| Torque output | 95–141 N⋅m (70–104 lbf⋅ft) |
| Dimensions | |
| Dry weight | 68 kg (150 lb) |
| Chronology | |
| Predecessor | Toyota E engine Daihatsu H-series engine (for K3 and 3SZ models) |
| Successor | Toyota NR engine (for some models) Toyota KR engine (I3, for 1SZ-FE) |
This engine family has offset crankshaft center to cylinder center-line called the Desaxe,[8] thin-wall cast-iron engine block, variable valve timing, and the 1.3L and 1.5L versions have the design to adopt to both longitudinal and transverse mounting.
1SZ-FE
The 1SZ-FE was jointly developed by Toyota and Daihatsu. It has 4 cylinders [1] It is 1.0 L (997 cc). 4 valve per cylinder. Bore and stroke is 69 mm × 66.7 mm (2.72 in × 2.63 in), with a compression ratio of 10.0:1. Output is 51.5 kW (69.1 hp; 70.0 PS) at 6000 rpm with 95 N⋅m (70 lbf⋅ft) of torque at 4000 rpm. It features VVT-i, off-set type crankshaft which enlarges Intake and Expansion strokes for a better thermal efficiency, and narrow-angle valves. Engine weight of 68 kg (150 lb); was achieved by using cast-iron cylinder block produced by cold-box method.
Applications:
2SZ-FE
The 2SZ-FE is 1.3 L (1,298 cc). Bore and stroke is 72 mm × 79.7 mm (2.83 in × 3.14 in), with a compression ratio of 11.0:1. Output is 64 kW (86 hp; 87 PS) at 6000 rpm with 122 N⋅m (90 lbf⋅ft) of torque at 4200 rpm. Daihatsu's internal code for this engine is labeled as K3-DE/VE and the turbocharged version as K3-VET.[citation needed] The engine features VVT-i (except for K3-DE model). In China, this engine is usually known as the 4A13.
Applications:
- Transversal:
- Toyota Yaris/Toyota Vitz (XP10/XP90)
- Toyota Belta
- Daihatsu Materia
- Daihatsu YRV (as K3-VE)
- Daihatsu YRV Turbo (as K3-VET)
- Toyota Ractis (XP100)
- Daihatsu Sirion (M100/M300) (as K3-VE)
- Perodua Myvi (M300/M600) (as K3-VE)
- Daihatsu Copen (export model for 2006-2011, as K3-VE)
- Longitudinal:
- Daihatsu Gran Max (as K3-DE)
- Toyota Avanza/Daihatsu Xenia (as K3-VE)
- Daihatsu Terios (first generation, 2000-2004) (as K3-VE)
3SZ-VE
Summarize
Perspective
The 3SZ-VE is 1.5 L (1,495 cc), introduced in October 2005. First installed in 2005 on the second generation Daihatsu Terios. Bore and stroke is 72 mm × 91.8 mm (2.83 in × 3.61 in), with a compression ratio of 10.0:1. Output is 80 kW (107 hp; 109 PS) at 6000 rpm with 141 N⋅m (104 lbf⋅ft) of torque at 4400 rpm. Commercial variant in Daihatsu Luxio and Daihatsu Gran Max has output of 97 PS (96 hp; 71 kW) at 6000 rpm with 13.7 kg⋅m (134 N⋅m) of torque at 4400 rpm.[9]
In addition to the series-common combination of offset desaxe crankshaft and VVT-i for a high thermal efficiency, this 1.5 Liter 3SZ-VE version has unusually long connecting rods to avoid the high rpm vibration (due to secondary imbalance, that can be lessened with a longer conrod) often associated with long-stroke engines. Compared to the 1.3L 2SZ-FE that shares the same bore size, the stroke is 12.2mm longer, and the conrod center-to-center length is 18.5mm longer, more than three times as large as the 6.1mm, one half of the increased stroke that is normally required as the conrod length increase.
In order to accommodate this long conrod in addition to the increased stroke, the deck height (distance from the crankshaft center to the top of cylinder wall) was increased by 25.5mm, making the engine assembly taller. This unique design (comparable to 2L Volvo B5204 five-cylinder that has the same deck-height as the 2.3L version because of its modular design, or Formula One and other racing engines) enabled the same 6,500rpm redline as the 1L and 1.3L versions despite a vastly different bore-to-stroke ratio.[8]
To cope with the increase in intake and exhaust flow volume, the intake valve size was increased from 26.1mm to 27.8mm, and the exhaust valve size was increased from 22.6mm to 23.4mm, which necessitated the use of small 12mm spark plugs. Throttle butterfly diameter was increased from 45mm of the 1.3L to 50mm, and the cam timing and lift are made more aggressive (Duration of 230° from 220°, lift of IN8.0mm/EX6.7mm from IN7.2mm/EX6.7mm).[8]
Applications:
- Transversal:
- Daihatsu Sirion
- Daihatsu Materia / Daihatsu Coo
- Toyota bB
- Toyota Passo Sette
- Perodua Alza (M500) (2009–2022)
- Perodua Myvi SE / Perodua Myvi Advance (2011–2017)
- Toyota Vios (China)
- Longitudinal:
- Daihatsu Terios
- Daihatsu Gran Max (1.5-litre variants)
- Daihatsu Luxio
- Toyota Avanza (1.5-litre variants)
- Toyota Rush
- Toyota TownAce/LiteAce (2008–2020)
See also
Wikimedia Commons has media related to Toyota SZ engines.
References
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