How does a common rail fuel pump work?
How does a common rail fuel pump work?
Abstract: In the common rail system, fuel is distributed to the injectors from a high pressure accumulator, called the rail. The rail is fed by a high pressure fuel pump. The pressure in the rail, as well as the start and end of the signal that activates the injector for each cylinder are electronically controlled.
What kind of fuel pump does a 3304 have?
The 13.5° camshaft is installed in all the later 3304 fuel injection pump and governor groups. It gives better fuel combustion characteristics than the 12.5° camshaft. On some engines, an automatic timing advance unit connects the drive sleeve on the end of the camshaft to the timing gears in the front of the engine.
Where is the timing pin on a fuel injection pump?
The timing of the fuel system is according to the camshaft installed in the housing for the fuel injection pumps (15). The difference between the camshafts is in the different angle between the lobes on the camshaft and the slot for the timing pin.
How does the fuel timing work on a Caterpillar engine?
On some engines, an automatic timing advance unit connects the drive sleeve on the end of the camshaft to the timing gears in the front of the engine. The unit changes the timing of the fuel system according to the engine speed to give better combustion of the fuel at all levels of engine operation.
What kind of camshaft does a 3306 engine have?
The 3306 Engine can have either one of two different camshafts for the fuel injection pump. The 8.5° camshaft is for the 3306 Engines which have a turbocharger, an aftercooler and an automatic timing advance unit. ALL other 3306 INDUSTRIAL AND MARINE ENGINES use the 13.5° camshaft.
Where are the timing gears on a Caterpillar 3304?
1. Drive gear for fuel injection pump. 2. Idler gear for fuel injection pump. 3. Camshaft gear. 4. Crankshaft gear. 5. Balancer shafts (3304 Engines only). 6. Idler gear for oil pump. 7. Drive gear for oil pump. The timing gears are at the front of the cylinder block.
The 13.5° camshaft is installed in all the later 3304 fuel injection pump and governor groups. It gives better fuel combustion characteristics than the 12.5° camshaft. On some engines, an automatic timing advance unit connects the drive sleeve on the end of the camshaft to the timing gears in the front of the engine.
The timing of the fuel system is according to the camshaft installed in the housing for the fuel injection pumps (15). The difference between the camshafts is in the different angle between the lobes on the camshaft and the slot for the timing pin.
On some engines, an automatic timing advance unit connects the drive sleeve on the end of the camshaft to the timing gears in the front of the engine. The unit changes the timing of the fuel system according to the engine speed to give better combustion of the fuel at all levels of engine operation.
