Mazda 3 I-stop
green technology
Once stopped to a traffic light or congestion, the shutdown of walk in idle can reduce fuel consumption by roughly 5 percent according to the European tests of lead-mode of city. However, the disadvantage with conventional with vacuum-stop systems is that they are based only on the use of an electrical motor to restart the engine. In oneself, they require of a number of hours relatively long to carry out combustion in the engine when it restarts. In the real drive, this means that delay between the moment when the accelerator pedal is inserted and the car starts to move, like the vibration and the noise.
I-stop the system for new Mazda 3 powers the engine of DISI 'the potential of direct-injection of S to improve the economy of fuel, while restarting the engine quickly and quietly by injecting the fuel directly in the cylinder and by firing it to force the piston to the bottom and to place the crank in the movement. The engine is ordered with the precision to do this to occur:
Special conditions of engine
In order to employ the energy of combustion of the initial stage to restart the engine, and to start the engine quickly, the three following conditions must be satisfactory while the engine is turned off. (1) the engine must be able to inject the fuel directly in the combustion chamber and to fire it; (2) by with proportioned quantity of fresh air must exist in the combustion chamber of the cylinder where the fuel must be put at fire; and (3) the control system of computer must be able to determine which cylinder to put fire right after starting the engine. I-stop the system must, therefore, use an engine of direct-injection which can provide the fuel to the combustion chamber to the pressure, and which can easily fire this fuel. Mazda 'the gasoline of liter DISI of S MZR 2.0 is the ideal engine to carry out this.
Position of control of piston
The pistons are stopped in position appropriate when the engine is turned off, to proportioned quantity of air is held in the combustion chamber, and the combustion chamber is correctly cleaned to reduce the quantity of not burned gasoline. For this purpose, the position of piston is ordered by applying the current to the engine with the 'generator of S while the engine is turned off. In this manner, it functions an electrical motor just like, whereas the use of the signal of the ruined probe of angle this supervises the position of piston while feedback of order to stop the piston in position indicated in its race of expansion.
Order of balance special of valve and crankshaft
To clean the combustion chamber, new Mazda 3 I-stop the system temporarily opens the control valve of power slightly during the stopped process. (The control valve of power is normally closed while cutting the engine.) The regular ruined probes of angle can only determine the rotation forwards, which leaves them unable to supervise reversed rotation or to determine the correct position of piston. Mazda 's I-stop uses a ruined probe of angle which can supervise the rotation ruined in the two directions, enabling him to determine exactly the correct position of piston. To maintain the crankshaft suitable balance when the engine is turned off, it is turned slightly in the direction of inversion.
A faster restarting + lower fuel consumption
These measurements make it possible to inject the fuel correctly when the engine is restarted and lighting of order advances, allowing of this fact the energy of combustion of being employed while the engine is turned off and to restart the engine in 0.35 second, harshly half of time required by conventional with vacuum-stop systems. While Mazda 's new I-stop the system uses the energy of combustion to restart the engine, it is helped by the starter for only the turns first of the crank. This carries out optimum balance between maximizing savings in fuel while reducing the number of hours to the minimum required to restart the engine. Consequently, it leaves I-stop to reduce fuel consumption beyond what would be possible using only the energy of combustion to restart the engine.
Communication system of support of driver
On new Mazda 3 actuated by the engine of MZR 2.0 DISI, I-stop the system supports the driver by allowing the visual confirmation of the operation of engine compared to leading the model. There is I-stop the switch "Goes/Arr't" on the instrument panel, and the beam of driver contains a light which postings I-stop when the system turned off the engine in front traffic lights, for example. Once put not under tension, an amber legend proves that I-stop the system is not above.
To ensure the reliable operation
Nouveau Mazda 3 I-stop the system (only available with the gasoline of liter DISI of MZR 2.0) is equipped with an auxiliary battery which actuates the system if the principal battery isn 't correctly charged or a certain similar problem would occur. These additional control measures make sure that the driver can employ the system naturally, without him to give doubts. Moreover, the system does not cut the engine if the car is stopped on a road with an extremely stiff category, (slope moreover more considerably than 14 percent).
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