Renault K-Type engine

The K-Type engine is an evolution of the Energy engine, itself derived from the Cléon-Fonte engine in which a hemispherical head incorporating a camshaft driven by a toothed timing belt was fitted. The K-Type engine is the ultimate evolution of the Cléon-Fonte engine. The main modification of the K-Type engine is the use of removable cylinder liners. The first K-Type appeared on the Megane with a capacity of 1.6 L (1,598 cc).[1]

The KxJ displaces 1.4 L (1,390 cc). It is an evolution from Renault Energy ExJ.

The KxM engine has a displacement of 1.6 L (1,598 cc) featuring multi-point fuel injection and EGR emission control system fitted.

K7M engines tend to suffer quite badly from head gasket failure due to coolant pumps and overheating but are otherwise very tough and powerful engines. 8mm square key is required for the oil drain plug.

Renault K-Type dCi
Overview
Manufacturer	Renault-Nissan
Also called	1.5 dCi
Production	2001–present
Layout
Configuration	Inline-4
Displacement	1.5 L; 89.2 cu in (1,461 cc)
Cylinder bore	76 mm (2.99 in)
Piston stroke	80.5 mm (3.17 in)
Valvetrain	SOHC/2 valves x cyl.
Compression ratio	15.2:1
Combustion
Turbocharger	BorgWarner Variable-geometry
Fuel system	Common rail direct injection
Management	Delphi Continental (ex Siemens) Bosch
Fuel type	Diesel
Cooling system	Water-cooled
Output
Power output	65–110 PS (48–81 kW; 64–108 hp)
Torque output	160–260 N⋅m (118–192 lb⋅ft)
Chronology
Predecessor	Renault F-Type engine
Successor	Renault R-Type engine

The K9K is a family of straight-4 turbocharged diesel engines co-developed by Nissan and Renault. The turbochargers used with this engine are provided by Garrett and BorgWarner.[10] It has a displacement of 1461 cc and is called 1.5 dCi (direct Common-rail injection). Fuel injection systems were supplied by Delphi on the lower power level versions (up to 66 kW (90 PS; 89 hp) and by Continental (ex Siemens) on the higher power level versions (70 kW (95 PS; 94 hp) and higher). The Delphi injection systems have been replaced with Bosch ones in the Euro 5 versions.

There are three versions of this engine: a low power version, a high power version and a high power version with variable-geometry turbocharger.[11] Their maximum power output varies depending on the emission standards they meet. In Euro 3 standards, their power levels are 65 PS (48 kW), 80 PS (59 kW) and 100 PS (74 kW). In Euro 4 standards, their power levels are 70 PS (51 kW), 85 PS (63 kW) and 106 PS (78 kW). In Euro 5 standards, their power levels are 75 PS (55 kW), 90 PS (66 kW) and 110 PS (81 kW).[11] Torque outputs range from 160 to 260 N⋅m (118 to 192 lb⋅ft) at 1,750 rpm.

The engine has been in production since 2001, with over 10 million units sold as of April 2013. Improvements over this period have included coating the tappets to reduce friction by 40%; redesigning the injector spray angle, resulting in a 15% reduction of NO
x during combustion and a small improvement in torque; and fitting new piston rings, reducing the tension on the belt-driving engine accessories and optimizing the dimensions of the base engine. The injection pattern has been altered to have two pilot injections over a wide operating range, reducing combustion noise by up to 3 decibels. Still newer technology also includes using a variable-pressure oil pump, and adding stop/start battery technology and low-pressure exhaust-gas recirculation. The K9K engine is produced in Bursa, Turkey; Chennai, India; and Valladolid, Spain. Emissions-wise, it emits as little 90 g (3.2 oz)/km of carbon dioxide.[12]

• Renault R-Type engine
• List of Renault engines
• List of PSA engines
• Nissan HR engine
• Renault–Nissan Alliance