CRDi stands for Common Rail Direct Injection meaning, direct
injection of the fuel into the cylinders of a diesel engine via a
single, common line, called the common rail which is connected to all
the fuel injectors. Common-rail technology is intended
to improve the pulverization process. Conventional direct injection
diesel engines must repeatedly generate fuel pressure for each
injection. But in the CRDI engines the pressure is built up
independently of the injection sequence and remains permanently
available in the fuel line. CRDI system that uses an ion sensor to
provide real-time combustion data for each cylinder. The common rail
upstream of the cylinders acts as an accumulator, distributing the fuel
to the injectors at a constant pressure of up to 1600 bar. Here
high-speed solenoid valves, regulated by the electronic engine
management, separately control the injection timing and the amount of
fuel injected for each cylinder as a function of the cylinder's actual
need.
CRDi stands for Common Rail Direct Injection meaning, direct injection of the fuel into the cylinders of a diesel engine via a single, common line, called the common rail which is connected to all the fuel injectors.
Whereas ordinary diesel direct fuel-injection systems have to build up pressure anew for each and every injection cycle, the new common rail (line) engines maintain constant pressure regardless of the injection sequence. This pressure then remains permanently available throughout the fuel line. The engine's electronic timing regulates injection pressure according to engine speed and load. The electronic control unit (ECU) modifies injection pressure precisely and as needed, based on data obtained from sensors on the cam and crankshafts. In other words, compression and injection occur independently of each other. This technique allows fuel to be injected as needed, saving fuel and lowering emissions.
More accurately measured and timed mixture spray in the combustion chamber significantly reducing unburned fuel gives CRDi the potential to meet future emission guidelines such as Euro V. CRDi engines are now being used in almost all Mercedes-Benz, Toyota, Hyundai, Ford and many other diesel automobiles.
Download your Presentation Papers from the following Links.
CRDi stands for Common Rail Direct Injection meaning, direct injection of the fuel into the cylinders of a diesel engine via a single, common line, called the common rail which is connected to all the fuel injectors.
Whereas ordinary diesel direct fuel-injection systems have to build up pressure anew for each and every injection cycle, the new common rail (line) engines maintain constant pressure regardless of the injection sequence. This pressure then remains permanently available throughout the fuel line. The engine's electronic timing regulates injection pressure according to engine speed and load. The electronic control unit (ECU) modifies injection pressure precisely and as needed, based on data obtained from sensors on the cam and crankshafts. In other words, compression and injection occur independently of each other. This technique allows fuel to be injected as needed, saving fuel and lowering emissions.
More accurately measured and timed mixture spray in the combustion chamber significantly reducing unburned fuel gives CRDi the potential to meet future emission guidelines such as Euro V. CRDi engines are now being used in almost all Mercedes-Benz, Toyota, Hyundai, Ford and many other diesel automobiles.
Download your Presentation Papers from the following Links.
Labels:
Seminar Topics,
Seminar Topics 2012
Previous Article
Posts
Responses
0 Respones to "crdi Common Rail Direct Injection"
Post a Comment