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CN-224228763-U - Pump body of high-pressure pump, fuel supply system and engine system

CN224228763UCN 224228763 UCN224228763 UCN 224228763UCN-224228763-U

Abstract

The application relates to a pump body of a high-pressure pump, a fuel supply system and an engine system. The high-pressure pump is for supplying pressurized fuel to an engine, and a pump body of the high-pressure pump includes a first pump body portion made of a first material, and a second pump body portion made of a second material different from the first material, wherein the first material has higher corrosion resistance than the second material, and wherein the first pump body portion and the second pump body portion are fixed to each other. Thereby enabling a reduction in pump weight and cost.

Inventors

  • ZHANG JIANXIN

Assignees

  • 博世汽车系统(无锡)有限公司

Dates

Publication Date
20260512
Application Date
20250519

Claims (10)

  1. 1. A pump body (50) of a high-pressure pump (60), said high-pressure pump (60) being intended to supply pressurized fuel to an engine, It is characterized in that the method comprises the steps of, The pump body (50) comprises: A first pump body part (10) made of a first material, and A second pump body portion (20) made of a second material different from said first material, Wherein the first material has a higher corrosion resistance than the second material, Wherein the first pump body part (10) and the second pump body part (20) are fixed to each other.
  2. 2. The pump body (50) according to claim 1, characterized in that, The first pump body portion (10) includes a flow control module having: A fuel inlet (11); a fuel outlet (12); A metering valve mounting hole (13) in which a metering valve (18) can be mounted in the metering valve mounting hole (13), and And a relief valve mounting hole (14), wherein a relief valve (19) can be mounted in the relief valve mounting hole (14).
  3. 3. The pump body (50) according to claim 2, characterized in that, The second pump body portion (20) comprises: A pressurizing module (21), the pressurizing module (21) having at least one pressurizing assembly mounting hole (22), a pressurizing assembly (23) for pressurizing the fuel being mountable in the pressurizing assembly mounting hole (22), and -A drive module (25), the drive module (25) having a drive assembly receptacle (26), a drive assembly (27) for driving the supercharging assembly (23) being mountable in the drive assembly receptacle (26).
  4. 4. A pump body (50) according to claim 3, characterized in that, The flow control module of the first pump body part (10) has a first flow channel system (17) formed in a wall of the flow control module, and The pressure-increasing module (21) of the second pump body part (20) has a second flow channel system (24) formed in a wall of the pressure-increasing module (21), Wherein the fuel inlet (11), the fuel outlet (12), the metering valve mounting hole (13) and the relief valve mounting hole (14) of the flow control module and the pressurizing assembly mounting hole (22) of the pressurizing module (21) are in fluid communication with each other via the first flow channel system (17) and the second flow channel system (24), Wherein the inner wall of the second flow channel system (24) of the pressurizing module (21) is provided with an anti-corrosion coating or anti-corrosion coating.
  5. 5. A pump body (50) according to claim 3, characterized in that, The high pressure pump (60) is a single fuel high pressure pump and the fuel is methanol, or The high pressure pump (60) is a dual fuel high pressure pump, wherein the flow control module has a first fuel inlet, a first fuel outlet, a first metering valve mounting hole and a first relief valve mounting hole for a first fuel and a second fuel inlet, a second fuel outlet, a second metering valve mounting hole and a second relief valve mounting hole for a second fuel, wherein the pressurization module (21) has at least one first pressurization assembly mounting hole for the first fuel and at least one second pressurization assembly mounting hole for the second fuel.
  6. 6. The pump body (50) according to claim 5, characterized in that, The first fuel is methanol and the second fuel is diesel.
  7. 7. The pump body (50) according to claim 1, characterized in that, The first material is stainless steel and the second material is an aluminum alloy.
  8. 8. A high-pressure pump (60) is characterized in that, The high-pressure pump (60) has: pump body (50) according to any one of claims 1 to 7; A metering valve (18); An overflow valve (19); at least one pressurizing assembly (23), and A drive assembly (27).
  9. 9. A fuel supply system, characterized in that, The fuel supply system comprises a high pressure pump (60) according to claim 8.
  10. 10. An engine system, comprising an engine, It is characterized in that the method comprises the steps of, The engine system further comprising a fuel supply system according to claim 9 for supplying pressurized fuel to the engine.

Description

Pump body of high-pressure pump, fuel supply system and engine system Technical Field The application relates to the technical field of engines, in particular to a pump body of a high-pressure pump, a fuel supply system and an engine system. Background In an engine system, fuel is supplied to an engine of the engine system by a fuel supply system. In order to supply fuel to the engine, the fuel supply system draws fuel from a fuel tank by a transfer pump (also referred to as a low pressure pump or a pre-transfer pump) and delivers the fuel to a high pressure pump where the fuel is pressurized to a sufficient injection pressure to ensure efficient injection of the fuel into the cylinders of the engine. With the growing global economy and the increasing population, energy demand continues to rise. The traditional petroleum fuels are increasingly supplied with intense and widely fluctuating prices, which has prompted people to search for alternative energy sources. Such as methanol, natural gas, etc., are becoming an important alternative to petroleum fuels as clean and efficient energy sources. High pressure methanol injection systems are currently in research and development stages in the world and there are no mass produced products. The high-pressure pump for research test is also a diesel high-pressure pump, and most of the diesel high-pressure pump body is made of aluminum alloy material, and some of the diesel high-pressure pump body is made of cast iron. However, methanol on the market is corrosive to aluminum alloys and cast iron used in existing high pressure pump bodies. For commonly used aluminum alloys, the main problem is that aluminum corrosion can produce tiny aluminum oxide particles that can clog the injection holes of the injector or enter the cylinder to damage the engine. Although the corrosion resistance of the aluminum alloy part can be improved by hard anodic oxidation, the corrosion resistance requirement of the whole service life cannot be met. Customers require designs that do not allow aluminum to methanol contact on future mass produced high pressure pumps. For the above requirements, an all-stainless steel pump body can be a simple and quick solution, but the drawbacks are also very obvious, namely that the weight and cost of the parts will be greatly increased: Since the density of the stainless steel is about 3 times that of the aluminum alloy, the weight of the pump body is increased to about 3 times that of the original pump body; The cost of raw materials is greatly increased, and can be up to about 3-5 times of the original cost, even higher, depending on the finally selected materials; stainless steel is not suitable for casting, the forging process of the pump body blank is difficult, and the cost is greatly increased; The stainless steel pump body is high in machining difficulty, the materials are difficult to stick to the cutter, the chip breaking is difficult, the roughness is difficult to ensure, the cutter breaking is easy to occur, and particularly the deep long hole is machined, so that the machining cost is greatly increased. Disclosure of utility model The present application aims to solve or at least alleviate at least some of the problems of the prior art. A first aspect of the present application is to provide a pump body of a high-pressure pump for supplying pressurized fuel to an engine, wherein the pump body includes: a first pump body portion made of a first material, and A second pump body portion made of a second material different from the first material, Wherein the first material has a higher corrosion resistance than the second material, Wherein the first pump body portion and the second pump body portion are secured to one another. Optionally, the first pump body portion and the second pump body portion are detachably secured to each other. Thus, only the first pump body portion of the pump body is made of a material having a higher corrosion resistance, such as stainless steel, while the second pump body portion of the pump body may be made of a material having a lower corrosion resistance, such as an aluminum alloy, so that the total weight and cost of the pump body do not increase much relative to an all-aluminum alloy pump body, but are significantly reduced relative to an all-stainless steel pump body, while meeting the corrosion resistance requirements for fuel. Optionally, the first pump body portion includes a flow control module having a fuel inlet, a fuel outlet, a metering valve mounting hole in which a metering valve can be mounted, and an overflow valve mounting hole in which an overflow valve can be mounted. Optionally, the second pump body portion includes a pressurizing module having at least one pressurizing assembly mounting hole in which a pressurizing assembly for pressurizing the fuel can be mounted, and a driving module having a driving assembly receiving portion in which a driving assembly for driving the pressurizing assembly