The Micra DIG-S is the strongest expression of Pure Drive philosophy. Since 2011, all the new Nissan who look at the Mention Pure Drive emit less than 130 g/km of CO2, but the new MICRA DIG-S establishes new references. With emissions of only 95 g/km of CO2, it has one of the cleanest gasoline engines in the world.
The Tres-cylinder DIG-S motor compact, is called the HR12DDR code, which is related to the well-known HD16 family of four-cylinder engines that move the Note, Juke and Qashqai. This efficient unit of 12 valves, has a cylinder of 1,198 cc
The key technologies of this engine include the direct injection of gasoline and a compressor (hence the name of DIG -S by Direct Injection Gasoline - Superchard). This forced admission introduces more air in the engine to achieve greater efficiency and superior power; Despite a engine of only 1.2 liters, its 98 hp of power are closer to what is usually common in a 1.5 -liter engine, but with the own consumption of a 1.0 -liter engine.
The result, three basic qualities in a single engine: power, efficiency and fun. By combining the performance of a gasoline engine with the economy and emissions of a diesel, the engine is smaller, but this does not affect its benefits at all.
Its careful design ensures that the usual inconveniences of three -cylinder engines, such as idle vibrations, have been eliminated. In this case, with the inclusion of a counterweight in the crankshaft pulley that generates an oval movement that compensates for the vertical vibration originated by the piston race. Consequently, the HD12 engine has noise levels and vibrations (NVH) equivalent to those of a 4 -cylinder engine.
In addition to being more compact, the fact that this engine has fewer moving parts, involves a reduction in internal frictions and improvements at thermal efficiency level. The low friction techniques used, include a nano-pole nano, the adoption of a diamond carbon layer (DLC) hydrogen-free in the rings of the pistons and valve elevators, a variable displacement oil pump and the use of low viscosity oil. All these elements allow to reduce internal friction levels by 30%, compared to those of a four -cylinder power and equivalent benefits.
Other technologies designed to maximize consumption efficiency are the variable opening of the valves (VTC), with the recirculation of exhaust gases to improve combustion, low friction oil pumps, high drop pistons and a higher compression ratio.
Another key element to gain efficiency in the engine, is the adoption of the Miller combustion cycle, which combined with an efficient supercharging and an advanced Stop/Start system, provide high performance to the engine with low consumption and unparalleled emissions.
When delaying the time of closing the intake valves, the admission time in the Miller cycle improves thanks to the compression time, which implies that the thermal energy of the fuel is transformed into kinetic energy more efficiently than in a conventional four -stroke engine, and at the same time, pumping losses caused by negative pressure in the admission duct are reduced.
The mixture of high pressure at high pressure already high temperature, is refrigerated by the latent heat of the vaporization of the gasoline injected directly into the cylinder, and the temperature of the combustion chamber, is reduced thanks to the adoption of cooling channels in the pistons and exhaust valves filled with sodium that, in addition, control the detonation. These technologies have allowed a compression ratio of 13: 1 to increase the efficiency of combustion without the problems that are traditionally associated with high compression relationships.
The compressor is equipped with an automatic opening and closure clutch, which means that both the notable consumption efficiency, and the high level of motor benefits, are obtained by automatically disconnecting the compressor when circulating at low speed; For example, in urban driving.
Direct injection has numerous advantages over multipoint injection into gasoline engines. In a conventional engine, when the rotation speed of it increases, the opening and closing times of valves are gradually shortened and, therefore, the time available to perform the fuel injection is reduced. This problem does not exist in the DIG-S engine, since the high pressure injector is located directly into the combustion chamber: the adoption of this position means that it is possible to exercise complete control of the entire combustion process. With this, engine consumption is also improved and the power and torque are increased, while the emissions are even better controlled.
In the development process, Nissan engineers optimized all the peripheral components used in the car, such as the alternator. In a conventional car, the battery is recharged by an alternator permanently moved by the distribution strap. This process of creating electricity consumes fuel. A regenerative alternator, on the contrary, has an intelligent control system that restricts the battery charge to those moments when the power of the engine is not required, such as in the braking phases. The alternator will stop loading the battery when the vehicle advances with the gas maintained or when it is accelerating. In any case, the demand for electricity is constantly monitored, so the system will automatically load the battery when it considers that it is necessary to ensure at all times its full load.
The result is one of the most powerful engines of its segment, with levels of benefits of an atmospheric engine of 1.5 liters, but with the consumption of a 1.0 -liter engine in a smaller and lighter block than a four -cylinder conventional engine of its same displacement. The new Nissan DIG-S engine complies with Euro 5 anti-emissions regulations.
The power developed is 72 kW (98 hp) at 5,600 rpm and the torque is 142 Nm to 4,400 rpm. The maximum speed is 180 km/h (CVT: 178 km/h) with an acceleration of 0 to 100 km/h in 11.3 seconds. Combined consumption is 4.1 l/100 km (CVT: 5.0 l/100 km) while CO2 emissions are 95 g/km for the manual version and 115 g/km for the CVT gearbox equipped. This spectacular CO2 emissions figure is obtained at the level of visia equipment, which has a lower weight than the most equipped Autcenta (the best selling version) and Tekna (the range of range). But the efficiency of the DIG-S engine is so high and the use of the rest of Pure Drive technologies so effective, that all units with manual change, in any of the three finishes, emit less than 100 g/km of CO2.
The reason why the new micra is only available with gasoline engines is very simple: with its advanced technology, it achieves the consumption figures of a diesel with the added benefits of benefits and refine Very high price particles, something not very compatible with an urban car.
Transmissions
The standard transmission is a precise five -speed manual gearbox, which activates the front wheels. A sophisticated CVT transmission is also available in option. This gearbox, new development, has numerous technological advances and is the world's first CVT box with a system of sub-planetaries that achieve high softness.
It also has the highest change relationship; 7.3: 1 which allows transmission to combine an excellent response to low revolutions with a high consumer economy at high speed.
The adoption of a sub-planetary change allows to use smaller pulleys, which increases the distance between them, allowing the oil to circulate between them more effectively. With this, the quality of the oil is preserved and friction is reduced inside the box.
The use of smaller components, such as an ultrafine torque converter, allows the assembly to be 10% more compact and 13% lighter than the previous box.
Equipment and finishes
The MICRA DIG-S has a complete standard equipment and proposes numerous and innovative elements designed to facilitate driving in the city. Following Nissan's policy, the reason is to facilitate European clients their day to day in the city.
Externally, the different finishes are recognized by subtle differences: the visia have 14 -inch steel tires and doors of the doors and rearviews in black color, while they accent them, with 15 -inch steel tires, they have the B pillar between both doors in black, the doors of the doors and the mirrors in the color of the body and a chrome junch. Tekna versions are identified by the chrome frame that adorns air inlets and front fog lights and its 15 -inch alloy wheels.
All versions of the micra have complete active and passive safety equipment with standard ESP. All micra equip front, lateral and curtain airbags, rear headrest and ABS. The automatic closure of doors depending on the speed is also standard.
The assisted address with inclination adjustment, central locking, travel computer and front electric windows are also standard.
The accent versions, which must be the best selling of the range, add a front signs and the height -adjustable driver seat. Both the steering wheel and the shift lever protector are lined with leather, while the audio equipment is of higher performance, thanks to the inclusion of a CD reader, four speakers and an Aux-In connection. It also includes bluetooth connectivity for mobile phones. The practical elements include a hook to hang bags in the companion seat that prevents the objects from whet by the cabin when the car is moving.
The Tekna versions add the Nissan Connect system, an integrated entertainment and information equipment that incorporates a navigation system with a five-inch color touch screen, bluetooth connectivity for mobile phones, streaming audio for external music devices, Aux-In and USB connections and a six speakers system.
The navigation system uses complete street maps instead of the indications by arrows, common in the cheapest systems, and can be programmed in up to nine languages, including Russian. The maps, which can be easily updated, through an SD card, cover Western Europe, Eastern Europe and Russia.
With the integration of the information offered by the positioning sensors and those of the vehicle speed, the system does not suffer from the signal losses when driving through a tunnel or when the car is surrounded by very high buildings.
The system incorporates TMC messages (Traffic Message Channel), which uses a second radio receiver to facilitate information about the traffic status or notify incidents on the main roads. When processing this data in real time, the system suggests faster alternative routes, which saves time and reduces emissions. Serially in the Tekna versions, the Nissan Connect is optional in the accent versions.
Other serial elements in the Tekna are the headlights and automatic windshield wiper, electrically folding rearviews, linked to the optional smart key (very unusual equipment in an urban car), the commissioning button and off the engine, and an information screen in the instrumentation. In addition to providing information on consumption, autonomy or external temperature, the on -board computer reports in real time saved thanks to the Stop/Start system. The optional equipment includes the smart key system, an unusual element in an urban car, which incorporates a button for the engine and off the engine.
Another example of how Nissan has become a pioneer brand to provide high -tech equipment, is the innovative parking aid system Parking Slot Measurement (PSM), really easy to use and offered as standard in the Tekna versions and optionally in Accent.
Reflecting the urban vocation of the micra, the PSM helps the driver to calculate if a space on the road is large enough to park. When the driver locates a space, he can activate the PSM by means of a button on the dashboard and put the intermittent side on which the space chosen to indicate to the system the side of the vehicle to analyze is located.
With a speed less than 25 km/h, the sensors scan the available space and warn about the convenience of parking on it or not, by notice on the instrumentation screen. The screen will present an 'OK' if the space exceeds 100 cm or more the length of the car, it will notify a message 'difficult' if the space is between 60 and 99 cm larger than the, micra and warn with a message 'not advised' if the excess space is less than 60 cm. The final decision to park will then be in the hands of the driver ...
These tolerance levels can be adjusted to adapt to driver's ability according to three levels; Amateur, normal and expert. The sensors are scheduled to detect even tow balls, signaling cones or elements of similar size. When the micra has PSM, it also includes the parking assistant sensors in the rear. These sensors produce acoustic and visual signals to show the distance with another vehicle parked in the rear or with a wall. The micra is the only car in its segment that equips the PSM system.
Among the options available, one of the most demanded will be, without a doubt, the glass ceiling that covers practically the entire upper of the car between the windshield and the B pillars and virtually all the width of it. This roof transforms the lighting of the morder of the micra contributing a natural light bath. The ceiling has an integrated interior curtain for when the sun squeezes excessively and can affect comfort.
Main serial equipment
Visia
Front, lateral and curtain airbags
Esp
ABS
Stop/Start
Power steering
Doors closure depending on speed
Manual air conditioning
Travel computer
Centralized closure with remote control
