Автор: Прохожий (194.84.190.---)
Дата: давно
еще, оригинал и картинки здесь:
http://www.nissan.co.jp/COMPASS/TECH/NEODI_D/neodi_d.html
It can be proud with field, We want Diesel.
Going out in the nature, you play, outdoor life. So, when it is the smoke lavish Diesel car where the car which goes out is black, it opposes to my feeling which loves the nature whether it is it is not, when, it is what, it can pull the air a little. While producing the black smoke which pollutes NOx and the air which are called cause of the acid rain and the photochemical smog as for running, the feeling which faces to field and being contrary, it is what, as for the person whom you feel hesitantly, probably there are no times when it is many unexpectedly?
But, is the Diesel engine probably the naturally villain? Making compression ratio high, because it can make the fuel thin, the CO2 discharge quantity is small in comparison with the gasoline engine. If of terrestrial warming is thought, the Diesel engine the advantage puts out the fact that CO2 which is the greenhouse effect gas is little, even fuel economy is good to that. The Diesel engine also the side, with the energy conservation kind engine in terrestrial environment has.
Then, it leaves the point where the Diesel engine that is good and the CO2 discharge quantity is small originally, in comparison with the gasoline engine, also fuel economy about 2 being tenths satisfactory, is superior in thermal efficiency, if it keeps turning off the part which becomes topic, it probably means that the engine of ideal is produced. If the black smoke and not putting out NOx of course next lose also Diesel unique noise and the vibration and also punch power like the gasoline engine increases, there is no something to say.
Such a selfishness we would like to say, at will the fact that it actualizes is, new development NEO Di 2.5l serial 4 cylinder direct injection Diesel engines "YD25DDTi". Becoming that key "M-Fire combustion". With the helical inhalation port the strong swirl (the eddy of the air) it makes inside the cylinder, there injecting the fuel of fog condition by high pressure. Because the air and the fuel mix ideally, it burns completely, the soot which is the cinders is not the majority. In other words it means that the black smoke does not come out. In addition, way with the exhaust gas recirculation which again sends mass exhaust inside the cylinder, oxygen density inside the cylinder is low held down, burning temperature does not rise, control. NOx which occurs with hot combustion has been decreased. In addition, by the fact that fuel injection time can be delayed substantially, combustion becomes calm and when noise and the vibration are decreased, in order simultaneously, to hold down burning temperature low, has contributed to the decrease of NOx even here. Vis-a-vis the former Diesel engine burning with the flame of the orange, as for the new development NEO Di direct injection Diesel engine with the blue flame complete combustion. As been taught to the time of the science, with clean combustion, there is no black smoke almost, 35% has reduced NOx. Furthermore, fuel economy to improve 40%, as for CO2 30% decrease. Due to the variable nozzle turbo and 4 valves DOHC, also acceleration efficiency like the gasoline powered vehicle has.
And, as for another new technology, ACM (Active Control Engine Mount: Active control engine mount). ACM which connects the engine and the body absorbs the vibration of the engine with computer control, almost holds down the vibration which is transmitted to the body to zero. Although the up-to-date earthquake-proof building, absorbs the vibration with the buffer agent and does not convey to the building itself it has been similar. Diesel silent characteristic of the car interior which cannot be thought. Diesel does not make say is noisy with already. It probably is long and live not to have to field on comfortable this.
New development NEO Di 2.5l serial 4 cylinder direct injection Diesel engines "YD25DDTi", in addition and oil exchange from 5000km, with consideration to environment such as the interval extension to every of 15000km, adoption of the metal gasket and adoption of the echo filter have tackled positively in recycling.
As for the Diesel engine, the CO2 discharge quantity is small originally in comparison with the gasoline engine, promising apparent it will be done in the future from the fact that also fuel economy is good. Ratio of the Diesel engine which is occupied in car new model car sale in Japan still is approximately 5%, but in sensitive European countries we occupy approximately about 15% ratio in regard to fuel economy and environment, in France 40% (the ratio in 95 car new model car selling) we have reached. You think Diesel from now on that it is possible to be taken a second look more and more. If we assume that this NEO Di direct injection Diesel has borne one end of the role, that very much happiness, it forces and it is thing.
* Merit of NEO Di direct injection Diesel engine
1. The M-Fire combustion which actualizes clean combustion
"M-Fire (Modulated-Fire) combustion
While decreasing NOx, the NISSAN individual "M-Fire combustion" which also the black smoke decreases simultaneously. Because mixture of the fuel and oxygen is done sufficiently, the soot where color of the flame is blue, becomes the cause of the black smoke (the smut) almost it does not occur. In the former Diesel engine, while with the purpose which decreases NOx and combustion noise, injecting the fuel because it burnt, mixture of the fuel and oxygen being insufficient, it became the orange flame, the soot occurred.
Epoch-making technology below is adopted for the actualization of "M-Fire combustion".
* Structure of NEO Di Diesel engine
Formation of strong swirl
By the adoption of the helical port of new development, the strong swirl (the eddy of the air) is formed inside the cylinder. The air and the fuel are mixed sufficiently the fuel of fog condition by injecting by high pressure in the strong swirl. It mixes with the air, as for the fuel which evaporates sufficiently in order to burn completely, as for the flame it becomes blue transparent, the soot of the cinders almost does not occur.
Large quantity EGR (Exhaust Gas Recirculation):Exhaust flow back for purifying the exhaust
Usual approximately 2 times and it increased EGR substantially. Oxygen density is decreased by the fact that exhaust is reset to inhalation in large quantities, burning temperature is controlled. As a result, it was possible to decrease NOx which occurs with former hot combustion.
Modification of fuel injection time
Injection timing of the fuel was modified. Combustion became calm depending upon the technique that, it can delay the injection substantially, in comparison with the injection timing of the former Diesel engine, noise and the vibration decreased substantially. In addition, burning temperature becomes low and has contributed to also the decrease of NOx.
* Cycle of M-Fire combustion
- Inhalation large quantity EGR
- Fuel injection
- Combustion
2. Actualizing the output of クラストップ
NEO Di Diesel engine "YD25DDTi" in addition to the high power by the intercooler attaching turbo, 4 valves DOHC (center arrangement of the nozzle) with achieves the output 150PS/4000rpm of クラストップ with the particulate conversion of the fuel with the improvement and the variable nozzle turbo of the combustion, actualizes the running which is not in the present Diesel car.
3. New development active control engine mount (ACM)
Inside the active control engine mount (ACM), the load sensor inspects the engine vibration which it tries probably to be transmitted to the body, uses the electromagnetic coil the power which it tries it will generate the power due to liquid pressure by the fact that the liquid where the actuator is while the mount is excited probably to be transmitted to the body is offset.
* The theory of ACM
*Theory
(1) the engine vibrates
It tries that (2) the vibration of the engine probably will be transmitted to the body,
The power which it tries that (3) the load sensor probably will be transmitted to the body,
(Transmission power) to inspect, control uni-
It conveys to ット
(4) control unit this transmission power striking
To calculate the electric current which is necessary in order to turn off, in the coil
It lets flow
(5) electric current flows to the coil due to the fact that magnetic force departure
Raising, movable edition vibrates, liquid pressure change occurs
(6) Power in order to deny transmission power with liquid pressure change
Occurs (the lower part right side arrow)
(7) As for the power where two powers are offset, are transmitted to the body instant
The time it becomes zero
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