Engine 2ZR-FE
Content
The ZR series engines appeared in the fall of 2006. The following summer, they began their serial production with Valvematic. One of them, the 2ZR-FE engine, developed in 2007, replaced the 1ZZ-FE model.
Technical data and resource
This motor is an in-line "four" and the characteristics of the 2ZR-FE are as follows:
| Volume | 1,8 l. |
| Power | 132-140 l. With. at 6000 rpm |
| Torque | 174 N * m at 4400 rpm |
| Compression ratio | 10.0:1 |
| Number of valves | 16 |
| Bore | 80,5 mm |
| Piston stroke | 88,3 mm |
| Weight | 97 kg |
The features of the unit include:
- DVVT system;
- version with Valvematic;
- the presence of hydraulic lifters;
- deaxage of the crankshaft.
The resource of the Toyota 2ZR-FE before the bulkhead is more than 200 thousand km, which usually consists of replacing worn or stuck piston rings.
Устройство
The cylinder block is lined from aluminum alloys. The sleeves have a ribbed outer side, which they are fused to the material of the block for a strong connection and improved heat dissipation. Due to the 7 mm wall thickness between the cylinders, no overhaul is foreseen.
The longitudinal axis of the crankshaft is offset by 8 mm relative to the axes of the cylinders. This so-called desaxage reduces the friction between the piston and the liner when the maximum pressure is created in the cylinder.
The camshafts are placed in a separate housing mounted on the block head. Valve clearances are adjusted by hydraulic lifters and roller tappets/rockers. The timing drive is a single-row chain (8 mm pitch) with a hydraulic tensioner installed on the outside of the cover.
The valve timing is changed by actuators mounted on the valve camshafts. Their angles vary between 55° (inlet) and 40° (outlet). The inlet valves are continuously adjustable in lift height using the system (Valvematic).
The oil pump operates from the crankshaft using a separate circuit, which is good when starting in winter, but complicates the design. The block is equipped with oil jets that cool and lubricate the pistons.
Advantages and disadvantages
The economy of a car with a 2ZR-FE engine is rated positively. It has a low consumption on the highway, however, depending on the outside temperature. The consumption is also affected by aggregation with a more efficient variator in this regard, and paired with an automatic transmission, the motor shows “average” efficiency.
With an increase in speed, the camshaft moves in an angular direction with respect to the pulley. Cams of a special shape, when the shaft is turned, the intake valves open a little earlier, and close later, which increases N and Mcr at high speeds.
The engine has a piston stroke of 88,3 mm, so its Vav = 22 m / s at rated load. Even light pistons do not increase the life of the motor. Yes, and increased waste of oil is also associated with this.
On this model, it is necessary to replace the timing chain after 150 thousand kilometers, it would be better together with other parts, since the old sprockets quickly wear out the new chain. But since the camshaft sprockets are made at the same time with expensive VVT drives and are not replaced separately, changing only the chain does little.
The horizontal location of the oil filter is unfortunate, since oil flows from it into the crankcase when the engine is turned off, which increases the time for raising the oil pressure at a new start.
There are also such disadvantages:
- difficult start and misfiring;
- traditional EVAP errors;
- leaks and noise of the coolant pump;
- problems with forced XX;
- hot start difficulty, etc.
Register of cars with 2ZR-FE engine
The following vehicles have this power plant:
- Toyota Allion?
- Toyota Premium;
- Toyota Corolla, Corolla Altis, Axio, Fielder;
- Toyota Auris;
- Toyota Yaris;
- Toyota Matrix / Pontiac Vibe (USA);
- Scion XD.
This engine is promising: it will be installed on the new Toyota Corolla along with the 2ZR-FAE model.
