Toyota UR engine

Toyota UR engine
Overview
Manufacturer	Toyota Motor Corporation
Production	2006–present
Combustion chamber
Configuration	DOHC 90° V8
Chronology
Predecessor	Toyota UZ engine

The Toyota UR engine family is a 32-valve quad-camshaft V8 piston engine series which was first introduced in 2006 as the UZ series it replaced began phasing out. Production started with the 1UR-FSE engine with D4-S direct injection for the 2007 Lexus LS. The series launched with a die-cast aluminum block, aluminum heads, and magnesium cylinder head covers. All UR engines feature variable valve timing for both intake and exhaust cams or Dual VVT-i. Timing chains are used to drive the camshafts. The UR engine has been produced in 4.6, 5.0, and 5.7 liter displacement versions.

The 1UR-FSE V8 engine, introduced with the Lexus LS 460 & LS 460 L luxury sedans in 2006 has a 4.6 litre (4608cc) displacement, which it gets from a 94 mm bore and 83 mm stroke. The engine includes D4-S direct injection and dual VVT-iE producing 385 hp (287 kW) at 6,400 rpm and 51 kg·m (500 N·m; 369 lb·ft) at 4,100 rpm.

1UR-FSE undergoes X-ray inspection and a CT (computed tomography) scan to ensure minimal deformation after the die-casting process. Camshafts are hollow to minimize weight.

Applications:

The 1UR-FE is based on the 1UR-FSE but lacks the D4-S direct injection technology. Originally used for Lexus vehicles in the Middle East, it was introduced in 2010 in other markets to replace the 2UZ-FE engine in truck and SUV applications. This engine produces 347 hp (259 kW) at 6,400 rpm and 46.9 kg·m (460 N·m; 339 lb·ft) at 4,100 rpm in the Lexus GS and LS. For the Toyota Land Cruiser the engine produces 304 hp (227 kW) at 5,500 rpm and 44.8 kg·m (439 N·m; 324 lb·ft) at 3,400 rpm.

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