New Injector Nozzle Dlla149p1805 0433172099 for Fuel Injector 0445120168 0445120405 0445120406
products detail
Used in Vehicles / Engines
| Product Code | Dlla149p1805 0433172099 |
| Engine Model | / |
| Application | 0445120168 0445120405 0445120406 |
| MOQ | 6 pcs / Negotiated |
| Packaging | White Box Packaging or Customer's Requirement |
| Warranty | 6 months |
| Lead time | 7-15 working days after confirm order |
| Payment | T/T, PAYPAL, as your preference |
Injector working process
(1) After the main injection pre-injection, the oil pump plunger continues to move downward, causing the oil pressure in the high-pressure oil chamber to rise rapidly. When the oil pressure rises to be higher than the pre-injection oil pressure (30MPa), the injection needle valve moves up and the main injection starts. Because the fuel oil pressure in the high-pressure oil chamber rises extremely fast, the oil pressure in the high-pressure oil chamber will continue to rise to about 205MPa.
(2) The main fuel injection ends. When the electronic control system stops supplying power to the electromagnetic control valve, the needle valve of the electromagnetic control valve moves to the right under the action of the return spring of the electromagnetic control needle valve, and connects the high-pressure oil chamber and the low-pressure oil passage. At this time, the fuel in the high-pressure oil chamber flows to the low-pressure oil passage through the electromagnetic control valve, the fuel pressure in the high-pressure oil chamber drops, the fuel injection needle valve resets under the action of the return spring of the fuel injection needle valve, and the auxiliary plunger is in the injection state. Under the action of the return spring of the oil needle valve, the oil passage between the high-pressure oil chamber and the return spring of the injection needle valve is closed, and the main fuel injection ends.
(3) Oil enters the high-pressure oil chamber. When the descending section of the cam contacts the rocker arm, the pump oil plunger moves upward under the action of the return spring of the pump oil plunger, and the high-pressure oil chamber generates a vacuum due to the increase in volume. At this time, the fuel in the low-pressure oil passage (connected with the oil inlet pipe) flows to the high-pressure oil chamber through the electromagnetic control valve until the high-pressure oil chamber is filled, so as to prepare for the next fuel injection.
