Mazda makes leap in fuel economy

Mazda makes leap in fuel economy

Mazda has independently developed an idling stop system, called the Smart Idle Stop System (SISS), which improves fuel economy by about ten percent (in Japan’s 10-15 mode tests*).

The SISS uses direct injection technology to achieve an excellent engine restart, ensuring drivers do not experience any discomfort with the new system.  Mazda plans to begin progressively introducing this core environmental technology to the marketplace in 2009.

Andrew Clearwater, managing director Mazda New Zealand says the Smart Idle Stop System will be an important addition to Mazda’s vehicles.  “Mazda is focussed on improving fuel efficiency across our vehicle line up.  The new smart idling stop system will benefit motorists in busy urban areas where vehicles frequently stop at traffic lights or in heavy traffic.”

Idling stop systems save fuel by shutting down the engine automatically when the car is stationary, and restarts it when the driver resumes driving.

Conventional idling stop systems restart a vehicle’s engine with an electric motor using exactly the same process as when the engine is started normally. Mazda’s SISS, on the other hand, restarts the engine through combustion.  Mazda’s system initiates engine restart by injecting fuel directly into the cylinder while the engine is stopped, and igniting it to generate downward piston force.

In order to restart the engine by combustion, the pistons must be stopped at exactly the correct position to create the right balance of air volume in each cylinder. The Smart Idle Stop System provides precise control over the piston positions during engine shutdown to accomplish this.  The SISS indexes each cylinder and initiates fuel injection before the engine begins to rotate.  This enables the engine to be restarted in just 0.35 seconds for vehicles with an automatic transmission, roughly half the time of a conventional electric motor idling stop system.

In addition to saving fuel, Mazda’s Smart Idle Stop System ensures that the engine will restart quickly and with exactly the same timing every time.  Drivers will feel no delay when resuming their drive, which means they can enjoy a comfortable and stress-free ride.

* The 10-15 mode test is the Japanese standard for emission certification and fuel economy for light duty vehicles.  It consists of two separate drive cycles.  The 10-mode drive cycle is a low speed drive cycle test, while the 15-mode is a higher speed assessment.

Mazda has independently developed an idling stop system, called the Smart Idle Stop System (SISS), which improves fuel economy by about ten percent (in Japan’s 10-15 mode tests*).

The SISS uses direct injection technology to achieve an excellent engine restart, ensuring drivers do not experience any discomfort with the new system.  Mazda plans to begin progressively introducing this core environmental technology to the marketplace in 2009.

Andrew Clearwater, managing director Mazda New Zealand says the Smart Idle Stop System will be an important addition to Mazda’s vehicles.  “Mazda is focussed on improving fuel efficiency across our vehicle line up.  The new smart idling stop system will benefit motorists in busy urban areas where vehicles frequently stop at traffic lights or in heavy traffic.”

Idling stop systems save fuel by shutting down the engine automatically when the car is stationary, and restarts it when the driver resumes driving.

Conventional idling stop systems restart a vehicle’s engine with an electric motor using exactly the same process as when the engine is started normally. Mazda’s SISS, on the other hand, restarts the engine through combustion.  Mazda’s system initiates engine restart by injecting fuel directly into the cylinder while the engine is stopped, and igniting it to generate downward piston force.

In order to restart the engine by combustion, the pistons must be stopped at exactly the correct position to create the right balance of air volume in each cylinder. The Smart Idle Stop System provides precise control over the piston positions during engine shutdown to accomplish this.  The SISS indexes each cylinder and initiates fuel injection before the engine begins to rotate.  This enables the engine to be restarted in just 0.35 seconds for vehicles with an automatic transmission, roughly half the time of a conventional electric motor idling stop system.

In addition to saving fuel, Mazda’s Smart Idle Stop System ensures that the engine will restart quickly and with exactly the same timing every time.  Drivers will feel no delay when resuming their drive, which means they can enjoy a comfortable and stress-free ride.

* The 10-15 mode test is the Japanese standard for emission certification and fuel economy for light duty vehicles.  It consists of two separate drive cycles.  The 10-mode drive cycle is a low speed drive cycle test, while the 15-mode is a higher speed assessment.

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