The D Engine was designed simply because the "Energy Engine 1.2 Clio by design with its hemispherical cylinder head exhaust up to the front of the head could not fit under the hood early Twingo. The launch of the Twingo 1993 Renault was not thought too the success of this small car, at that time, the Energy engine had recently appeared, it was unthinkable to conceive another engine displacement and power equivalently, the design of an engine generates several years of study and costs are considerable. So to launch its Twingo in 1993, Renault's legendary spring and proven Cléon-Fonte engine in an exclusive engine, which it could fit under the hood of the little Renault, equipping it of single point injection system. The Cleon-Fonte engine is an old design, since it has a lateral camshaft, this engine appeared in 1962 on Renault Floride and Renault 8. For 1997, new standards pollution should be applied. Renault could have kept his Cléon-Fonte 1.2 on the Twingo and its Energy engine 1.2 on the Clio, applying changes to its engines, including equipping each multipoint injections, but rather than investing fees studies on two different engines and before the unexpected success of Twingo, it is preferable to opt for a new engine that could both be mounted on the Twingo as the Clio, hence the birth of the "D Engine". This new engine will be produced D7F1 kind Douvrin by the "Société Française de Mécanique". The D engine will be equipped as the Energy engine a hemispherical cylinder head incorporating the camshaft, but exhaust will be placed at the back of the head, in order to get under the hood of the Twingo. On machining cylinder engine has no removable shirts as was the case in Cléon-Fonte engine and Energy engine. The D7F engine was mounted since 1996 on the Twingo and Clio I. It is also used in the Express Kangoo 1 and Clio 2, Twingo 2.
The D7F was succeeded by the D4F in December 2000. It was the same displacement but added 16-valveSOHC heads for at 5500 rpm and at 3500 rpm. It was revised in 2004 to receive better intake design with much larger air filter extending torque range from 3500rpm to 4250 rpm. D4F-740 variant received changes to camshaft and valve lifters to allow lower idle at 650 rpm and shorter 1st and 2nd gear to help with extra weight of new Clio III introduced in 2005. Applications:
In an effort to produce a cost-effective fuel efficient engine Renault introduced a turbocharged version of the D4F, the D4FT, in 2007. Renault named it the 1.2 TCE. This engine features revised 16-valve heads, stronger internals and lower compression ratio to handle the higher stress caused by turbocharging, resulting in at 5500 rpm and at 3000 rpm. Renault created the break by suggesting downsizing on petrol engines, with the range of TCe engines. TCe engine - TCe 100, the bestpetrol engine due to its driving pleasure and moderate fuel consumptionthanks to high and instant low/midrange torque rather than high power near redline. The TCe petrol engine offers the power output of a 1.4L engine, the torque of a 1.6L engine and the fuel consumption almost of a 1.2L engine. It is responsive from low revs, flexible and has power in reserve while displaying the lowest fuel consumption figures for a petrol engine. It emits only 137 g/Km of CO2 on Clio 3 and 140 g/km of CO2 on Modus and the Twingo GT. These unique qualities are obtained thanks to the combination of a 1.2L capacity engine with a low inertia low boost pressure turbocharger whose response time is reduced to the minimum, through the use of a turbine and a small diameter compressor. It produces and. The turbocharger includes an "overpower" feature which temporarily boosts power output in 2nd, 3rd and 4th gears at engine speeds of more than 4,500 rpm. It is fitted to the following vehicles:
