|
 |
|
 |
|
In 1995, DENSO launched the world’s first common rail system. The common rail system accumulates high-pressure fuel in the common rail and injects the fuel into the engine cylinder at timing controlled by the engine ECU, allowing high-pressure injection independent from the engine speed
In 2002, DENSO introduced 180 MPa (1800 bar) systems with five-time multiple injections.
In 2007, DENSO announced a new diesel CRS featuring 200 MPa (2000 bar) injection pressure and up to nine injections per combustion stroke, once again achieving the highest injection pressure in the world Key benefits •Improved reliability, performance and drivability •Lightest common rail system of its type •Lowers fuel consumption and emissions such as nitrogen oxide (NOx) and particulate matter (PM) •Easily meets EURO 4 emission requirements without using expensive diesel particulate filters |
|
COMMON RAIL INJECTORS |
 |
Fuel injectors perform an important role in the accurate metering and atomisation of fuel. These electro-mechanical valves react in milli-seconds to open and close giving the electronic control unit optimal control over fuel flow to the engine.
Compared with its first-generation injector (1,450 bar, two-times injection) DENSO developed higher-response solenoid actuator and high-pressure injector design. The 2nd Generation injector is able to inject up to 1,800 bar pressure and multiple injection, with timing intervals of 4/10,000 seconds during which a maximum of 5 injections takes place. As a result, exhause gas is cleaner while noise is minimized. |
|
COMMON RAIL PUMPS |
|
A high-pressure pump generates in an accumulator – the rail – a pressure of up to 1,800 bar (determined by the injection pressure setting in the engine control unit), independently of the engine speed and the quantity of fuel injected.
The first-generation supply pump could generate pressures of up to 1,450 bar, which represented the mechanical limits of the inner cam design. However, to achieve pressures above this, DENSO developed revolutionary new coating and machining technologies, and by the second-generation design, changed to an outer cam design in the supply pump to achieve pressures up to 1,800 bar. |
|
COMMON FUEL RAIL |
|
| A common fuel rail which is nothing more than a pressure accumulator where the fuel is stored at high pressure. This accumulator supplies multiple fuel injectors with high pressure fuel. |
|
 |
|
|
