Nissan HR engine

Nissan HR engine
Overview
Manufacturer	Nissan Machinery (Aichi Kikai), Renault and MDC Power GmbH (for Mercedes-Benz)
Also called	Mercedes-Benz M281/282 engine Renault H engine
Production	2004-present
Layout
Configuration	Inline-3, Inline-4
Displacement	series 72.2: 0.9–1.3 L (898–1,332 cc) series 75.5: 1.2–1.5 L (1,199–1,498 cc) series 78: 1.0–1.6 L (999–1,598 cc)
Cylinder bore	72.2 mm (2.84 in) 75.5 mm (2.97 in) 78 mm (3.07 in)
Piston stroke	69.7 mm (2.74 in) 73.1 mm (2.88 in) 78.4 mm (3.09 in) 81.3 mm (3.20 in) 83.6 mm (3.29 in) 83.7 mm (3.30 in) 89.3 mm (3.52 in)
Cylinder block material	Aluminum
Cylinder head material	Aluminum
Valvetrain	DOHC 4 valves x cyl. with VVT
Combustion
Supercharger	On DDR series
Turbocharger	On DDT series
Fuel system	Electronic fuel injection Direct injection
Fuel type	Gasoline
Cooling system	Water-cooled

The HR is a family of straight-3 12-valve and straight-4 16-valve automobile engines with continuously variable valve timing, involving development by Nissan (Aichi Kikai) and/or Renault, and also Mercedes-Benz in the case of the H5Ht/M282. The designation of H engine is used by Renault, and M28x by Mercedes-Benz, to classify the family. There are three basic specifications of engine involving variations in engine architecture, or all-new architecture, with 72.2 mm (2.84 in), 75.5 mm (2.97 in) and 78 mm (3.07 in) bore diameter.