High-pressure oil feeding pump assembly for diesel engine common rail system
A common rail system and diesel engine technology, applied in the direction of charging system, engine components, mechanical equipment, etc., can solve the problems of small diesel engines such as difficulty in exhausting, small size, and difficulty in starting, and achieve the solution of difficult exhausting, small size, and reduced cost effect
Inactive Publication Date: 2018-12-18
龙口龙泵柴油喷射高科有限公司
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Problems solved by technology
It has small size, reduces the mixing of diesel and engine oil, and solves the problems of difficult exhaust and difficult starting of small diesel engines
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[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them.
[0030] Such as figure 1 , figure 2As shown, a high-pressure fuel supply pump assembly for a common rail system of a diesel engine includes a pump body part, a fuel delivery pump part 19 connected to the pump body part, a pump oil system part, a pressure stabilizing valve part 27, and a fuel metering valve part 6. Among them, the pump body parts include pump body 13, drive shaft parts, and tappet body parts 9. The pump body is used as a base to support other parts. The pump body parts are provided with bearing seats and tappet body mounting holes, an...
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The invention discloses a high-pressure oil feeding pump assembly for a diesel engine common rail system. The high-pressure oil feeding pump assembly for the diesel engine common rail system comprisesa pump body part, an oil delivery pump part, an oil pumping system part, a pressure stabilizing valve part and a fuel oil metering valve part, wherein the oil delivery pump part, the oil pumping system part, the pressure stabilizing valve part and the fuel oil metering valve part are connected with the pump body part. The pump body part comprises a pump body, a driving shaft part and a tappet body part. A bearing pedestal and a tappet body installation hole are arranged in the pump body part. The driving shaft part comprises a camshaft. The tappet body part is installed in the tappet body installation hole of the pump body, and a rolling wheel on the lower portion of the tappet body part makes contact with a cam on a shaft portion shaft. The oil delivery pump part is driven by the camshaft to generate the negative pressure so as to suck diesel oil from a diesel oil tank. The pressure stabilizing valve part and the fuel oil metering valve part are connected in parallel, and the fuel oil metering valve part quantitatively conveys the low-pressure diesel oil to the oil pumping system part. The oil pumping system part enables the diesel oil metered by the fuel oil metering valve partto be pressurized and then drives the diesel oil to enter a common rail pipe. The two ends of the camshaft are connected with the bearing pedestal on the pump body and a bearing pedestal support on ashaft cover plate part through two bearings correspondingly.
Description
technical field [0001] The invention relates to the technical field of high-pressure fuel supply pumps for diesel engines, in particular to a high-pressure fuel supply pump assembly used in a diesel engine common rail system. technical background [0002] With the rapid development of engine technology and increasingly stringent emission regulations, the fuel injection systems of small diesel engines of China III and IV for non-road use and small diesel engines of China IV and V for vehicles are gradually switching to electronically controlled high-pressure common rail systems. [0003] The defects of the high-pressure oil supply pump assembly of the common rail system of diesel engines in the prior art are: ① the multi-cylinder high-pressure oil supply pump in the common rail system used by most small diesel engines is relatively large in size, and the oil supply capacity is far greater than the actual demand of the engine; ② As the injection pressure of the common rail sys...
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IPC IPC(8): F02M59/12F02M59/44F02M59/46F02M37/04F02M37/14
CPCF02M59/12F02M37/045F02M37/14F02M59/44F02M59/442F02M59/46
Inventor 刘本学潘永利李贯杨明亮赵华来于海徐卫平
Owner 龙口龙泵柴油喷射高科有限公司
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