CN114439660B - Oil pump - Google Patents
Oil pump Download PDFInfo
- Publication number
- CN114439660B CN114439660B CN202210100512.XA CN202210100512A CN114439660B CN 114439660 B CN114439660 B CN 114439660B CN 202210100512 A CN202210100512 A CN 202210100512A CN 114439660 B CN114439660 B CN 114439660B
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- Prior art keywords
- oil
- oil outlet
- pump
- valve
- channel
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- 239000000446 fuel Substances 0.000 claims abstract description 98
- 238000002485 combustion reaction Methods 0.000 abstract description 29
- 239000003921 oil Substances 0.000 description 253
- 238000000034 method Methods 0.000 description 6
- 239000000295 fuel oil Substances 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/462—Delivery valves
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides an oil pump, and belongs to the technical field of automobiles. The oil pump solves the problem that the existing oil pump can not meet the requirements of the combustion chamber and the precombustion chamber of the engine at the same time. The oil pump comprises a pump body, wherein a plunger is movably connected in a pump cavity of the pump body, an oil inlet communicated with the pump cavity is formed in the pump body, an oil outlet I and an oil outlet II communicated with the pump cavity are formed in the pump body, an oil outlet valve I and an oil outlet valve II are arranged in the pump body, when the pressure in the pump cavity is greater than the lower limit threshold value of the oil outlet valve I, the oil outlet valve I can be opened to enable fuel to be output from the oil outlet I, when the pressure in the pump cavity is greater than the lower limit threshold value of the oil outlet valve II, the oil outlet valve II can be opened to enable fuel to be output from the oil outlet II, and a pressure reducing valve capable of reducing the pressure of the fuel output from the oil outlet II is arranged in the pump body. The oil pump can meet the requirements of the combustion chamber and the precombustion chamber of the engine on the premise of ensuring the structural simplification of the oil pump.
Description
Technical Field
The invention belongs to the technical field of automobiles, and relates to an oil pump.
Background
Automobiles are one of the very important transportation means in life nowadays, generally consist of four basic parts of an engine, a chassis, a vehicle body and electrical equipment, and have the advantage of being convenient for people to travel.
At present, fuel-type automobiles are still mainstream, and in order to ensure the function of an engine, an oil inlet pipe and an oil pump are generally arranged in the automobile, and the specific working principle is as follows: the fuel is input into the pump cavity of the oil pump through the oil inlet of the oil tank by the oil inlet pipe, then the ECU is closed by controlling the oil inlet, so that the plunger on the oil pump is driven by the camshaft on the oil pump to do piston motion, the fuel is compressed, after a certain pressure is reached in the pump cavity, at the same time, the fuel with a certain pressure is transmitted to the oil rail through the mechanical oil outlet on the oil pump, and finally the fuel is input into the combustion chamber of the engine through the oil rail, thereby completing the fuel supply.
However, with the continuous development of technology, the performance of the automobile is continuously increased, in order to ensure the power and running stability of the engine, a designer may add a precombustor on the basis that the engine of the automobile has a combustion chamber, so that the oil pump divides the fuel into two parts and inputs the two parts of fuel into the combustion chamber and the precombustor respectively at different pressures in the actual running process of the automobile.
In the prior art, a common oil pump cannot output fuel to a combustion chamber and a precombustion chamber respectively under different pressures, and a plurality of sets of fuel supply systems (specifically, parts such as an oil pump, a driving cam shaft oil inlet pipeline, an oil outlet pipeline and the like are respectively arranged for the combustion chamber and the precombustion chamber) are generally assembled between the engine and the oil pump so as to achieve the purpose of fuel output and supply.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides an oil pump, which aims to solve the technical problems that: how to ensure that the oil pump can meet the requirements of the combustion chamber and the precombustion chamber of the engine under the premise of ensuring the simplified structure of the oil pump.
The aim of the invention can be achieved by the following technical scheme: the utility model provides an oil pump, includes the pump body, the pump intracavity swing joint of the pump body has the plunger, have the oil inlet with pump chamber intercommunication on the pump body, its characterized in that, have on the pump body with pump chamber intercommunication oil-out first and oil-out second, be equipped with in the pump body can control pump chamber with oil-out first the oil outlet valve with can control pump chamber with oil-out second break-make's oil-out second, when pump chamber internal pressure is greater than oil-out first's lower limit threshold value, oil-out valve first can open and make the fuel by oil-out first output, when pump chamber internal pressure is greater than oil-out second's lower limit threshold value, oil-out valve second can open and make the fuel by oil-out second output, just be equipped with in the pump body can to the fuel by oil-out second output's fuel pressure reducing valve.
The oil pump comprises a pump body, wherein a plunger which is movably connected in a pump cavity is arranged on the pump body (the plunger is mainly used for compressing fuel in the pump cavity through piston movement), an oil inlet, an oil outlet I and an oil outlet II which are communicated with the pump cavity are formed in the pump body, when the oil pump is installed, the oil outlet I can be connected with a combustion chamber of an engine through an oil rail I, the oil outlet II can be connected with a precombustion chamber of the engine through an oil rail II, an oil outlet valve I and an oil outlet valve II are also arranged in the pump body, the oil outlet valve I is used for controlling the on-off of the pump cavity and the oil outlet I, the oil outlet valve II is used for controlling the on-off of the pump cavity and the oil outlet II, in the working process of the engine, fuel enters the pump cavity through the oil inlet, the plunger is compressed through the piston movement, and when the fuel pressure reaches a certain pressure value (the pressure value indicated by the plunger indicates the lower limit threshold value of the oil valve I and the oil outlet II), the oil outlet valve I and the oil outlet II can be opened passively through the fuel pressure, so that the pump body I and the oil outlet II can be respectively output to the fuel outlet I and the oil outlet I and II, and the outlet I, and II, so that the actions of the pump to be completed to the combustion chamber and the precombustion chamber of the engine; in addition, the pressure reducing valve is arranged in the pump body, and in the process that fuel flows through the second oil outlet valve and is output to the second oil outlet, the pressure reducing valve can firstly reduce the pressure of the part of fuel, so that the pressure of the fuel output by the second oil outlet is smaller than that of the fuel output by the first oil outlet, the fuel is respectively supplied to the precombustor and the combustion chamber through the pressure reducing valve at different pressures, a plurality of sets of fuel supply systems are not required to be integrated between the engine and the oil tank, and the oil pump (oil way) structure is simpler and the control strategy is simpler.
In the oil pump, the pump body is provided with an oil outlet channel I communicated with the pump cavity and the oil outlet I, the oil outlet valve I is arranged in the oil outlet channel I, and a pressure relief valve I is also arranged in the pump body, and when the pressure in the oil outlet channel I is larger than a lower limit threshold value of the pressure relief valve, the pressure relief valve I can be opened.
The pump body is internally provided with an oil outlet channel I, the oil outlet channel I is communicated with a pump cavity and an oil outlet I, an oil outlet valve I is arranged in the oil outlet channel I, the oil outlet channel I can be blocked under the closed state of the oil outlet valve I, the pump body is internally provided with a pressure relief valve I, the pressure relief valve I can relieve the pressure of fuel in the oil outlet channel I into the pump cavity, under the normal running state of an automobile, the continuous acting of a plunger can cause the excessive high pressure of the fuel in the pump cavity, the fuel flows out of the oil outlet I at the flow speed greater than the requirement of a combustion chamber after pushing the oil outlet valve I, the pressure of the fuel is greater than the lower limit threshold of the pressure relief valve I at the moment, the pressure relief valve I can be opened, the fuel in the requirement of the combustion chamber of the engine still flows out through the oil outlet I under the state, and the fuel greater than the lower limit threshold part of the pressure relief valve can push the pressure relief valve to flow back into the pump cavity together, so that the accurate control of the fuel output is achieved.
In the oil pump, the pump body is provided with an oil outlet channel II which is communicated with the pump cavity and the oil outlet II, the oil outlet valve II is arranged in the oil outlet channel II, and a pressure relief valve II is also arranged in the pump body, and when the pressure in the oil outlet channel II is larger than the lower limit threshold value of the pressure relief valve II, the pressure relief valve II can be opened.
The pump body is internally provided with a second oil outlet channel which is communicated with the pump cavity and the second oil outlet, the second oil outlet valve is arranged in the second oil outlet channel, the second oil outlet channel can be blocked under the closed state of the second oil outlet valve, the pump body is internally provided with a second pressure relief valve, the second pressure relief valve can relieve pressure of fuel in the first oil outlet channel into the pump cavity, under the normal running state of an automobile, the continuous acting of the plunger can cause the excessive high pressure of the fuel in the pump cavity, the fuel can flow out of the second oil outlet at the flow speed greater than the requirement of the combustion chamber after pushing the second oil outlet valve, the pressure of the fuel is greater than the lower limit threshold of the second pressure relief valve, the second pressure relief valve can be opened, the fuel in the requirement of the combustion chamber of the engine still flows out through the second oil outlet, and the fuel greater than the lower limit threshold of the pressure relief valve can push the second pressure relief valve and flow back into the pump cavity, so that the accurate control of the fuel output is achieved.
In the oil pump, the pressure reducing valve is arranged in the second oil outlet channel and is positioned between the second oil outlet valve and the second oil outlet.
The pressure reducing valve is arranged in the second oil outlet channel and is specifically positioned between the second oil outlet and the second oil outlet valve, fuel can flow into the pressure reducing valve after the second oil outlet valve is jacked up, and the pressure of the fuel can be reduced by the pressure reducing valve at the moment, so that the pressure of the fuel after passing through the pressure reducing valve is reduced, the pressure of the fuel in the first oil outlet channel is different from the pressure of the fuel in the second oil outlet channel, and the pressure of the fuel flowing out of the second oil outlet meets the requirement of the precombustion chamber.
In the oil pump, an oil return channel I communicated with the valve cavity and a buffer channel I communicated with the oil outlet I are further arranged in the pump body, the pressure relief valve I is arranged in the oil return channel I, one end of the buffer channel I is communicated with the oil outlet channel I, and the other end of the buffer channel I is communicated with the oil return channel I.
The oil return channel I and the buffer channel I are arranged in the pump body, one side of the buffer channel I is communicated with the oil outlet I, the pressure relief valve I is arranged in the oil return channel I, one end of the oil return channel I is communicated with the valve cavity, one end of the buffer channel I is communicated with the other end of the oil return channel I, and the other end of the buffer channel I is communicated with the oil outlet channel I, so that after the oil outlet valve I is jacked to enter the buffer channel I, part of fuel meeting the requirements of the combustion chamber flows out normally from the oil outlet I, and the fuel larger than the lower limit threshold part of the pressure relief valve jacks up the pressure relief valve and flows back into the valve cavity through the oil return channel I.
In the oil pump, an oil return channel II communicated with the valve cavity and a buffer channel II communicated with the oil outlet II are further arranged in the pump body, the pressure relief valve II is arranged in the oil return channel II, one end of the buffer channel II is communicated with the oil outlet channel II, and the other end of the buffer channel II is communicated with the oil return channel II.
The oil return channel II and the buffering channel II are arranged in the pump body, one side of the buffering channel II is communicated with the oil outlet II, the pressure relief valve II is arranged in the oil return channel II, one end of the oil return channel II is communicated with the valve cavity, one end of the buffering channel II is communicated with the other end of the oil return channel II, and the other end of the buffering channel II is communicated with the oil outlet channel II, so that after the oil outlet valve II is jacked up, part of fuel meeting the requirements of the combustion chamber normally flows out from the oil outlet II, and the fuel larger than the lower limit threshold part of the pressure relief valve II jacks up the pressure relief valve II and flows back into the valve cavity through the oil return channel II.
In the above oil pump, the pressure reducing valve is a proportional pressure reducing valve.
The pressure reducing valve is specifically a proportional pressure reducing valve, and can reduce the pressure of the fuel output by the oil outlet valve according to a certain proportion, so that the pressure of the fuel in the second oil outlet channel is smaller than that in the first oil outlet channel, and the fuel flowing out of the second oil outlet channel meets the fuel pressure requirement of the precombustor.
In the oil pump, the pump body is also provided with the needle valve and the control module arranged on the needle valve, the control module is provided with the connecting joint, the connecting joint is connected with the ECU for controlling the automobile, and the control module can control the needle valve to open or close according to the ECU command signal so as to open or close the oil inlet.
The needle valve and the control module are arranged on the pump body, the control module is provided with a connecting joint for connecting an automobile ECU, in the actual working process, the automobile ECU can drive the control module to control the needle valve to work according to a sensor signal (the sensor can detect the fuel quantity in a combustion chamber and a precombustion chamber in the engine), and the opening/closing of the needle valve is used for realizing the opening/closing of the oil inlet, so that the output of fuel is controlled.
Compared with the prior art, the oil pump has the following advantages:
1. the oil pump can supply fuel to the precombustor and the combustion chamber respectively through the first oil outlet valve and the second oil outlet valve, and the pressure of the fuel supplied to the precombustor and the combustion chamber is different through the setting of the pressure reducing valve, so that a plurality of sets of fuel supply systems are not required to be integrated between the engine and the oil tank, the structure of the oil pump (oil way) is simpler, and the control strategy is simpler.
2. When the pump body supplies oil to the combustion chamber normally, due to the existence of the first pressure relief valve, when the pressure of fuel output from the pump cavity to the first oil outlet channel is higher than the lower limit threshold value of the first pressure relief valve, the first pressure relief valve can be opened to enable the fuel which is larger than the lower limit threshold value of the pressure relief valve to prop up the pressure relief valve and flow back into the pump cavity together, and therefore accurate control of fuel output is achieved.
3. When the pump body supplies oil to the combustion chamber normally, due to the existence of the second pressure relief valve, when the pressure of fuel oil output from the pump cavity to the second oil outlet channel is higher than the lower limit threshold value of the second pressure relief valve, the second pressure relief valve can be opened to enable the fuel oil larger than the lower limit threshold value of the second pressure relief valve to prop up the second pressure relief valve and flow back to the pump cavity, and therefore accurate control of fuel oil output is achieved.
4. The pressure reducing valve is arranged in the oil outlet channel II and is positioned between the oil outlet valve II and the oil outlet II, and can further reduce the pressure of the fuel output by the oil outlet valve II, so that the pressure of the fuel in the oil outlet channel II is smaller than that of the fuel in the oil outlet channel I, and the pressure of the fuel in the oil outlet channel II meets the requirement of the precombustor.
5. The fuel entering the first oil outlet channel can enter the first buffer channel, partial fuel meeting the requirements of the combustion chamber is output from the first oil outlet, and the fuel larger than the lower limit threshold value part of the pressure relief valve flows back to the valve cavity through the first pressure relief valve and the first oil return channel in sequence, so that the output fuel pressure is accurately controlled.
6. The fuel entering the second oil outlet channel can enter the second buffer channel first, partial fuel meeting the requirements of the combustion chamber is output from the second oil outlet, and the fuel larger than the lower limit threshold of the second pressure relief valve flows back to the valve cavity through the second pressure relief valve and the second oil return channel in sequence, so that the output fuel pressure is accurately controlled.
7. The pump body is provided with a needle valve and a control module, the control module is provided with a connecting joint for connecting an automobile ECU, and in the actual working process, the automobile ECU can drive the control module to control the needle valve to work, and the opening/closing of the oil inlet is realized through the opening/closing of the needle valve, so that the output of fuel is controlled.
Drawings
Fig. 1 is a cross-sectional view of the present oil pump.
Fig. 2 is a second cross-sectional view of the present oil pump.
In the figure, 1, a pump body; 1a, a plunger; 1b, an oil inlet; 1c, a first oil outlet; 1d, an oil outlet II; 1e, an oil outlet valve I; 1f, an oil outlet valve II; 1g, an oil outlet channel I; 1h, a first pressure relief valve; 1i, an oil outlet channel II; 1i1, a pressure reducing valve; 1j, a pressure relief valve II; 1k, an oil return channel I; 1l, buffer channel one; 1m, an oil return channel II; 1n, buffer channel two; 1o, needle valve; 1o1, a control module; 1o11, connection joints.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1-2, the oil pump comprises a pump body 1, a pump cavity is formed in the pump body 1, a plunger 1a capable of moving in the pump cavity is arranged on the pump body 1, an oil inlet 1b is formed in the outer wall of the pump body 1, an oil inlet channel is formed in the pump body 1, one end of the oil inlet channel is communicated with the oil inlet 1b, the other end of the oil inlet channel is communicated with the pump cavity, and fuel in an oil tank can enter the pump cavity through the oil inlet 1b and the oil inlet channel in sequence.
As shown in fig. 1, a needle valve 1o is movably connected in a pump body 1, a control module 1o1 for controlling the needle valve 1o is mounted on the pump body 1, the control module 1o1 is specifically a signal receiver, a connecting joint 1o11 is arranged on the control module 1o1, the connecting joint 1o11 is used for connecting an ECU, the ECU can send an instruction to the control module 1o1 through the connecting joint 1o11 in the use process of the oil pump, the control module 1o1 controls the needle valve 1o to perform piston movement, an oil inlet channel can be plugged when the needle valve 1o stretches out, and the oil inlet channel can be opened when the needle valve is retracted.
As shown in fig. 1, an oil outlet 1c is formed in a pump body 1, an oil outlet channel 1g which is communicated with a pump cavity and the oil outlet 1c is formed in the pump body 1, and fuel oil in the pump cavity can be input into an oil rail 1 communicated with a combustion chamber of an engine through the oil outlet channel 1g and the oil outlet 1c after being compressed by a plunger 1 a.
As shown in fig. 1, an oil return channel 1k and a buffer channel 1l are also arranged in the pump body 1, the oil return channel 1k is communicated with a pump cavity, one side of the buffer channel 1l is communicated with an oil outlet 1c, two ends of the buffer channel are respectively communicated with the oil outlet 1g and the oil return channel 1k, the oil pump also comprises an oil outlet valve 1e and a pressure relief valve 1h, the oil outlet valve 1e is a one-way valve, the pressure relief valve 1h can also be replaced by a safety valve, the oil outlet valve 1e is arranged in the oil outlet channel 1g to block the oil outlet channel 1g (the oil outlet valve 1e specifically comprises a valve core, a spring and a valve plate are arranged in the valve core, one side of the valve plate is abutted against a step surface at the inlet of the oil outlet channel 1g, the other side of the valve plate is abutted against the spring, the other end of the spring is abutted against the inner wall of the valve core), compressed fuel continuously impacts the oil outlet valve 1e by self pressure, when the pressure of the fuel is larger than the lower limit threshold of the first oil outlet valve 1e, the first oil outlet valve 1e is pushed open by the fuel (at this time, the spring is compressed, the fuel enters the first oil outlet valve 1e through a gap between the valve plate and the inner wall of the first oil outlet channel 1g, flows into the first oil outlet channel 1g from the first oil outlet valve 1 e), and flows into the buffer channel 1l along the first oil outlet channel 1g, the pressure relief valve 1h is arranged in the first oil return channel 1k, when the pressure of the fuel in the buffer channel 1l is larger than the lower limit threshold of the pressure relief valve 1h, the first oil outlet valve 1e still keeps an open state, part of the fuel meeting the requirements of the combustion chamber is output outwards from the first oil outlet valve 1c, and part of the fuel larger than the lower limit threshold of the pressure relief valve 1h enters the first valve body, and flows back into the pump cavity from the pressure relief valve 1h (the structure of the pressure relief valve 1h can be understood as the same as the first oil outlet valve 1 e).
As shown in fig. 2, an oil outlet II 1d is formed on the pump body 1, an oil outlet channel II 1i for communicating the pump cavity with the oil outlet II 1d is formed in the pump body 1, and fuel oil in the pump cavity can be input into an oil rail II communicated with the combustion chamber of the engine through the oil outlet channel II 1i and the oil outlet II 1d after being compressed by the plunger 1 a.
As shown in fig. 2, an oil return channel two 1m and a buffer channel two 1n are further arranged in the pump body 1, the oil return channel two 1m is communicated with a pump cavity, one side of the buffer channel two 1n is communicated with an oil outlet two 1d, two ends of the oil return channel two are respectively communicated with the oil outlet channel two 1i and the oil return channel two 1m, the oil pump also comprises an oil outlet valve two 1f and a pressure relief valve two 1j, the oil outlet valve two 1f is a one-way valve, the pressure relief valve two 1j can be replaced by a safety valve, the oil outlet channel two 1i is also internally provided with a pressure relief valve 1i1, the pressure relief valve 1i1 is in particular a proportional pressure relief valve (which can be replaced by an adjustable pressure relief valve), the pressure relief valve 1i1 is positioned between the oil outlet valve two 1f and the buffer channel, the compressed fuel continuously impacts the oil outlet valve two 1f through self pressure, when the pressure of the fuel is larger than the lower limit threshold of the oil outlet valve two 1f, the fuel is pushed open, the fuel enters the oil outlet channel two 1i, the pressure relief valve 1i is further depressurized, the fuel is input into the buffer channel two 1n after the pressure is reduced, and finally the fuel is output from the two 1d to the pre-combustion chamber so that the fuel can be supplied to the fuel chambers and the combustion chamber and can not be combusted; the second pressure relief valve 1j is arranged in the second oil return channel 1m, when the pressure of the fuel in the second buffer channel 1n is larger than the lower limit threshold value of the second pressure relief valve 1j, the fuel still normally outputs the second oil outlet 1d, but part of the fuel with the pressure higher than that of the second pressure relief valve 1j pushes the second pressure relief valve 1j open and flows back to the pump cavity through the second oil return channel 1m (the structure of the second oil outlet valve 1f is the same as that of the first oil outlet valve 1e, and the structure of the second pressure relief valve 1j is the same as that of the first pressure relief valve 1 h).
In addition, the included angle between the first oil outlet channel 1g and the control module 1o1 II as well as the oil outlet channel 1i in the radial direction of the pump body 1 is smaller than 180 degrees.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although 1, pump body is used more herein; 1a, a plunger; 1b, an oil inlet; 1c, a first oil outlet; 1d, an oil outlet II; 1e, an oil outlet valve I; 1f, an oil outlet valve II; 1g, an oil outlet channel I; 1h, a first pressure relief valve; 1i, an oil outlet channel II; 1i1, a pressure reducing valve; 1j, a pressure relief valve II; 1k, an oil return channel I; 1l, buffer channel one; 1m, an oil return channel II; 1n, buffer channel two; 1o, needle valve; 1o1, a control module; 1o11, connection joints, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (7)
1. The oil pump comprises a pump body (1), wherein a plunger (1 a) is movably connected in a pump cavity of the pump body (1), an oil inlet (1 b) communicated with the pump cavity is formed in the pump body (1), the oil pump is characterized in that the pump body (1) is provided with an oil outlet I (1 c) and an oil outlet II (1 d) communicated with the pump cavity, an oil outlet valve I (1 e) capable of controlling the on-off of the pump cavity and the oil outlet I (1 c) and an oil outlet valve II (1 f) capable of controlling the on-off of the pump cavity and the oil outlet II (1 d) are arranged in the pump body (1), when the pressure in the pump cavity is larger than the lower limit threshold of the oil outlet valve I (1 e), the oil outlet I (1 e) can be opened to enable fuel to be output from the oil outlet I (1 c), when the pressure in the pump cavity is larger than the lower limit threshold of the oil outlet II (1 f), an oil outlet II (1 f) can be opened to enable the fuel to be output from the two (1 d), a buffer channel II (1 d) is arranged in the pump body (1) and is communicated with one end of the two buffer channels (1 i) which are communicated with the oil outlet I (1 i), and the pressure reducing valve (1 i 1) is positioned between the oil outlet valve II (1 f) and the buffer channel II (1 n).
2. The oil pump according to claim 1, characterized in that an oil outlet channel I (1 g) which is communicated with the pump cavity and the oil outlet I (1 c) is arranged in the pump body (1), the oil outlet valve I (1 e) is arranged in the oil outlet channel I (1 g), and a pressure relief valve I (1 h) is also arranged in the pump body (1), and when the pressure in the oil outlet channel I (1 g) is larger than the lower limit threshold value of the pressure relief valve I (1 h), the pressure relief valve I (1 h) can be opened.
3. The oil pump according to claim 2, characterized in that the oil outlet valve two (1 f) is installed in the oil outlet channel two (1 i), and the pump body (1) is also internally provided with a relief valve two (1 j), and when the pressure in the oil outlet channel two (1 i) is greater than the lower limit threshold of the relief valve two (1 j), the relief valve two (1 j) can be opened.
4. An oil pump according to claim 2 or 3, characterized in that an oil return channel I (1 k) and a buffer channel I (1 l) communicated with the oil outlet I (1 c) are further arranged in the pump body (1), the pressure relief valve I (1 h) is arranged in the oil return channel I (1 k), one end of the buffer channel I (1 l) is communicated with the oil outlet channel I (1 g), and the other end of the buffer channel I is communicated with the oil return channel I (1 k).
5. The oil pump according to claim 4, wherein an oil return channel II (1 m) communicated with the valve cavity is further arranged in the pump body (1), the pressure relief valve II (1 j) is arranged in the oil return channel II (1 m), and the other end of the buffer channel II (1 n) is communicated with the oil return channel II (1 m).
6. The oil pump according to claim 4, characterized in that the pressure reducing valve (1 i 1) is a proportional pressure reducing valve (1 i 1).
7. The oil pump according to claim 5, characterized in that the pump body (1) is further provided with a needle valve (1 o) and a control module (1 o 1) arranged on the needle valve (1 o), the control module (1 o 1) is provided with a connecting joint (1 o 11), the connecting joint (1 o 11) is connected with an ECU (electronic control unit) for controlling an automobile, and the control module (1 o 1) can control the needle valve (1 o) to open and close according to an ECU command signal so as to open/close the oil inlet (1 b).
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| CN202210100512.XA CN114439660B (en) | 2022-01-27 | 2022-01-27 | Oil pump |
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| CN202210100512.XA CN114439660B (en) | 2022-01-27 | 2022-01-27 | Oil pump |
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| CN114439660B true CN114439660B (en) | 2023-08-11 |
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