Nissan HR engine

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.

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