DISI Turbo | Direct Injection Spark Ignition Technology | Variable Timing Technology

DISI includes a whole new set of innovations for gasoline engines. To mention a few, direct injection (including cooling the air-gasoline mixture), a new combustion chamber geometry, variable timing technology, and nanotechnology for the catalyst. This all makes the engines consume 20 percent less while getting 15 to 20 percent better performance.

01-DISI Turbo Engine-Direct Injection Spark Ignition system-idle stop mechanism

Further developments for its diesels: new direct injection technology (most European automakers are switching to piezoelectric injectors), making the engine lighter, DPF, and urea technology to reduce NOx emissions

01-Direct Injection spark ignition-DISI Turbo Technology-engine-schematic arrangement

Mazda’s DISI* engines balance sporty driving with outstanding environment performance. With the next generation engine in the series, we are aiming for a 15% ~ 20% improvement in dynamic performance and a 20% increase in fuel economy (compared with a Mazda 2.0L gasoline engine). Based on the direct injection system, we aim to reduce all energy losses (see figure on the right) and improve thermal efficiency through innovative engineering in a variety of technological areas. Among these technologies we are paying particular attention to direct injection, combustion control, variable valve system technology and catalyst technology. Also, among the various fuels on the market, we are studying the use of flex-fuel.

Common Rail Type Fuel Injection System

01-bosch-common rail injection system-cutting edge diesel technology-ultra high performance 12 cylinder engine

Electronic control common rail type fuel injection system drives an integrated fuel pump at an ultrahigh pressure to distribute fuel to each injector per cylinder through a common rail.


01-common rail fuel injection system
This enables optimum combustion to generate big horsepower, and reduce PM* (diesel plume) and fuel consumption.

01-common rail type fuel injection system-distribute in ultrahigh pressure- optimum combustion rate

Bosch will supply the complete common-rail injection system for the high-performance 12-cylinder engine introduced by Peugeot Sport for its latest racing car. The system comprises high-pressure pumps, a fuel rail shared by all cylinders (i.e. a common rail), piezo in-line injectors, and the central control unit which compiles and processes all relevant sensor data.