Mazda 3 i-stop, 2010
The one way Mazda achieved this is to develop unique idle-stop technology that shuts down the engine when stopped in traffic jams and similar situations as a way to reduce fuel consumption.
The Mazda 3 will be powered by the MZR 2.0L DISI engine with green idle-stop technology - Mazda's unique i-stop system. Developed solely by Mazda, it is the world's only idle-stop system that restarts the engine using the remaining energy in the pistons (with a quick help of the starter motor) by injecting fuel directly into the cylinder and igniting it to force the piston down. The benefit of combining a DISI engine with i-stop (originally called SISS: Smart Idle Stop System) is that the system restarts the engine about twice as fast, and quieter, than conventional idle-stop systems.
Combining these two Mazda proprietary technologies and further measures like aerodynamic modifications, help the new Mazda 3 achieve approximately 14 percent lower fuel consumption (combined) than the previous Mazda 3.
When the driver stops the vehicle (red light, traffic jam) the engine stops automatically and sets itself to be ready for a prompt restart. As soon as the driver presses the clutch, the engine initiates the restart procedure automatically. This is a totally neutral operation for the driver.
The Mazda 3 i-stop Green Technology
When stopped at a traffic light or in a traffic jam, shutting off the idling engine can reduce fuel consumption by approximately 5 percent according to European city driving-mode tests. However, the drawback with conventional idle-stop systems is that they rely solely on the use of an electric motor to restart the engine. As such, they require a relatively long amount of time to achieve combustion in the engine when it restarts. In real-world driving, this means a lag between the moment the accelerator pedal is pressed down and the car begins to move, as well as vibration and noise.
The i-stop system for the new Mazda 3 leverages the DISI engine's direct-injection potential for improving fuel economy, restarting the engine quickly and quietly by injecting fuel directly into the cylinder and igniting it to force the piston down and set the crank in motion. The engine is controlled with precision to make this happen:
The Special engine requirements
In order to use combustion energy from the initial stage of restarting the engine, and to start the engine quickly, the following three conditions must be satisfied while the engine is stopped. (1) The engine must be able to inject fuel directly into the combustion chamber and ignite it; (2) an adequate amount of clean air must exist in the combustion chamber of the cylinder where the fuel is to be ignited; and (3) the computer control system must be able to determine which cylinder to fire immediately after starting the engine. The i-stop system, therefore, must use a direct-injection engine that can deliver fuel to the combustion chamber at high pressure, and that can easily ignite that fuel. Mazda's MZR 2.0-litre DISI petrol is the ideal engine to achieve this.
The Mazda 3 will be powered by the MZR 2.0L DISI engine with green idle-stop technology - Mazda's unique i-stop system. Developed solely by Mazda, it is the world's only idle-stop system that restarts the engine using the remaining energy in the pistons (with a quick help of the starter motor) by injecting fuel directly into the cylinder and igniting it to force the piston down. The benefit of combining a DISI engine with i-stop (originally called SISS: Smart Idle Stop System) is that the system restarts the engine about twice as fast, and quieter, than conventional idle-stop systems.
Combining these two Mazda proprietary technologies and further measures like aerodynamic modifications, help the new Mazda 3 achieve approximately 14 percent lower fuel consumption (combined) than the previous Mazda 3.
When the driver stops the vehicle (red light, traffic jam) the engine stops automatically and sets itself to be ready for a prompt restart. As soon as the driver presses the clutch, the engine initiates the restart procedure automatically. This is a totally neutral operation for the driver.
The Mazda 3 i-stop Green Technology
When stopped at a traffic light or in a traffic jam, shutting off the idling engine can reduce fuel consumption by approximately 5 percent according to European city driving-mode tests. However, the drawback with conventional idle-stop systems is that they rely solely on the use of an electric motor to restart the engine. As such, they require a relatively long amount of time to achieve combustion in the engine when it restarts. In real-world driving, this means a lag between the moment the accelerator pedal is pressed down and the car begins to move, as well as vibration and noise.
The i-stop system for the new Mazda 3 leverages the DISI engine's direct-injection potential for improving fuel economy, restarting the engine quickly and quietly by injecting fuel directly into the cylinder and igniting it to force the piston down and set the crank in motion. The engine is controlled with precision to make this happen:
The Special engine requirements
In order to use combustion energy from the initial stage of restarting the engine, and to start the engine quickly, the following three conditions must be satisfied while the engine is stopped. (1) The engine must be able to inject fuel directly into the combustion chamber and ignite it; (2) an adequate amount of clean air must exist in the combustion chamber of the cylinder where the fuel is to be ignited; and (3) the computer control system must be able to determine which cylinder to fire immediately after starting the engine. The i-stop system, therefore, must use a direct-injection engine that can deliver fuel to the combustion chamber at high pressure, and that can easily ignite that fuel. Mazda's MZR 2.0-litre DISI petrol is the ideal engine to achieve this.




















































