Configuration l4 | Production 1995–present | |
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Displacement 1.4 L (1,390 cc)1.5 L (1,461 cc)1.6 L (1,598 cc) Predecessor Renault Energy engineRenault F-Type engine | ||
The K-Type is a family of inline-4 automobile engines developed and produced by Renault since the mid-1990s. This is an internal combustion engine, four-stroke, with 4 cylinders in line bored directly into the iron block, water cooled, with tree (s) driven overhead camshafts (s) by a toothed timing belt, with an aluminum cylinder head and valve head. This engine is available in petrol and diesel versions, with 8 or 16 valves.
Contents
History
The K-Type engine is an evolution of "Energy engine", it is intended to replace. The "Energy engine" was already an evolution of "Cléon-Fonte engine" in which a hemispherical head incorporating head 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 operated at machining cylinder, since this engine has removable liners. The 8-valve cylinder versions species is taken from Energy engine. The first engine K appears on the Megane 1 with a capacity of 1598 cm3, with a yoke 8 valves, K7M.
Gasoline versions
In 1998, the K7M engine is topped by a 16-valve cylinder head under the hood of the Laguna 1 Phase 2 - the K4M. This new engine replaces the 1.8 "F-Type engine" of Laguna 1 Phase 1.
The specificity of K4J and K4M engines is that they have a 16-valve cylinder head, similar to the F4P and F4R versions of F-Type engine, over the K4J and K4M engines share the same distribution kit and even water pump that the F-Type engine 16 valves (F4P and F4R).
Diesel versions
The K9K engine - diesel version with 1461 cc - appeared on the Clio 2 Phase 2, to replace the 1.9 D ("F-Type engine" ). This engine is equipped with high-pressure direct injection common-rail.
KxJ petrol engine
The KxJ displaces 1390 cc or 1.4 L. It is an evolution from Renault Energy ExJ.
Applications (K7J 8v)
Starting 2011 Dacia replaced the old KxJ with Euro 5 1.0 (16 valves), 1.2 (16 valves) and 1.6 liter engines.
KxM petrol engine
The KxM engine has a displacement of 1,598 cc (or 1.6 L) 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.
K9K dCi
The K9K is a family of straight-4 turbocharged diesel engines co-developed by Nissan and Renault. The turbocharger is provided by Borg-Warner. It has a displacement of 1461 cc and is called 1.5 dCi (diesel Common-rail injection). Fuel injection systems were supplied by Delphi on the lower power level versions (up to 66 kW/90 hp) and by Continental (ex Siemens) on the higher power level versions (70 kW/95 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. 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 105 PS (77 kW). In Euro 5 standards, their power levels are 75 PS (55 kW), 90 PS (66 kW) and 110 PS (81 kW). Torque outputs range from 160 to 260 Nm at 1,750 rpm.
The engine has been in production since 2001, with over 9 million units sold as of 2012. 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 NOx 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/km of carbon dioxide.