CN211900834U

CN211900834U - Oil tank assembly device for cold start of methanol engine

Info

Publication number: CN211900834U
Application number: CN202020310732.1U
Authority: CN
Inventors: 古金培; 王毅; 李庆
Original assignee: Dongguan Fuel Injection Technology Co ltd
Current assignee: Dongguan Fuel Injection Technology Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-11-10
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses an oil tank assembly device for methanol engine cold start has integrateed spare parts such as methanol oil tank, petrol oil tank, fuel feeding oil tank, pipeline solenoid valve I, pipeline solenoid valve II, fuel feed pump, level gauge, can store the composite fuel after main fuel methyl alcohol, accessory fuel petrol and the ratio, through the automatic ratio of control methyl alcohol and petrol and the injection of fuel, can solve the problem of methanol engine cold start difficulty.

Description

Oil tank assembly device for cold start of methanol engine

Technical Field

The utility model belongs to the technical field of the methanol engine, concretely relates to solve methanol engine oil tank assembly device of methanol engine cold start difficulty and fuel storage mode.

Background

The methanol is a new alternative energy source, and the raw materials for producing the methanol mainly comprise natural gas, coal bed gas, coke oven gas and the like because of wide range of raw materials for producing the methanol, and particularly, the high-sulfur inferior coal and the coke oven gas are used for producing the methanol, so that the comprehensive utilization of resources can be improved, and the environmental pollution can be reduced. The characteristics of the methanol in transportation, storage, split charging, filling and use are similar to those of gasoline and diesel fuel for internal combustion engines in the market; the methanol has high octane number and large latent heat of vaporization, is beneficial to improving the heat efficiency of an engine, has thorough oxygen-containing combustion per se, has lower emission compared with gasoline and diesel oil, has higher ignition temperature than gasoline, is safe in combustion process, and becomes the most practical and ideal alternative fuel in the later petroleum era.

Along with the implementation of the policies of Chinese social economic development, energy safety and energy conservation and emission reduction, the popularization of the methanol automobile is more and more strong. Because the latent heat of vaporization of the methanol fuel is larger and 3.5 times that of the gasoline, and more heat needs to be absorbed for vaporization, the methanol fuel is more difficult to start when the engine is in cold start. Therefore, chinese patent CN101629533A discloses a methanol engine fuel supply system and a control method thereof, wherein gasoline is used to start the engine, and after being successfully judged by other conditions, the engine is switched to methanol fuel; the method adopts double oil rails, namely a gasoline rail injects gasoline fuel and a methanol rail injects methanol fuel, the engine is started by gasoline, and the gasoline is switched to the methanol fuel after being judged to meet other conditions. In the technical scheme, a set of device special for gasoline injection needs to be additionally installed on the engine, the manufacturing process is increased, the cost is increased, the increase of various parts brings the increase of after-sale maintenance cost, and the large-scale popularization is not utilized.

SUMMERY OF THE UTILITY MODEL

For solving above technical problem, the utility model provides an oil tank assembly device for cold start of methanol engine has integrateed spare parts such as methanol oil tank, petrol oil tank, fuel feeding oil tank, pipeline solenoid valve I, pipeline solenoid valve II, fuel feed pump, level gauge, can store the composite fuel after main fuel methyl alcohol, accessory fuel petrol and the ratio, through the automatic ratio of control methyl alcohol and petrol and the injection of fuel, can solve the problem of the cold start difficulty of methanol engine.

The utility model provides a technical scheme as follows:

the utility model provides an oil tank assembly device for methanol engine cold start, comprises methyl alcohol oil tank, petrol oil tank, fuel feeding oil tank, pipeline solenoid valve I, pipeline solenoid valve II, fuel feed pump and level gauge, and the fuel feeding oil tank is connected with methyl alcohol oil tank and petrol oil tank respectively, and methyl alcohol oil tank and petrol oil tank set up the top at fuel feeding oil tank. The bottom of the methanol oil tank is provided with a methanol outlet, so that the methanol outlet needs to be arranged at the lowest position of the bottom of the methanol oil tank in order to prevent the methanol oil tank from still entering the oil supply oil tank when the amount of oil in the methanol oil tank is extremely small, the top of the oil supply oil tank is provided with a methanol inlet, a pipeline is connected between the methanol outlet and the methanol inlet, and a pipeline electromagnetic valve I is arranged on the pipeline; the bottom of gasoline tank is equipped with the petrol export, when preventing that the petrol oil tank oil mass is at the minimum, still can get into the fuel feeding tank, so the petrol export need be established in the lower of petrol oil tank bottom, fuel feeding tank top is equipped with the petrol entry, be connected with the pipeline between petrol export and the petrol entry, be equipped with pipeline solenoid valve II on the pipeline, fuel feeding tank the latter half is equipped with the oil-out, be provided with the fuel feeding pump in the fuel feeding tank of oil outlet department, fuel feeding tank the first half is equipped with the oil return opening, the oil-out, the oil return opening is connected with the oil rail pipe in the engine respectively, fuel feeding tank's.

Preferably, the oil supply tank is provided with four liquid level lines, which are a liquid level line, b liquid level line, c liquid level line and d liquid level line from top to bottom.

More preferably, the height of the methanol outlet is greater than that of a liquid level line c, and the size of a space between the methanol outlet and the methanol inlet can meet the installation requirement of the pipeline electromagnetic valve I; the height of the gasoline outlet is larger than that of a liquid level line, a pipeline passing through the gasoline inlet needs to extend into the oil supply tank, and the space between the gasoline outlet and the gasoline inlet can meet the installation requirement of a pipeline electromagnetic valve II.

Preferably, the distance between the outlet of the pipeline which passes through the gasoline inlet and is inserted into the fuel supply oil tank and the adsorption port of the fuel supply pump is less than 5 cm.

Preferably, the connection mode of the pipeline and the methanol outlet, the methanol inlet, the gasoline outlet, the connection part of the gasoline inlet and the oil supply oil tank body and the oil outlet is threaded connection or quick plug.

Compared with the prior art, the utility model discloses following technical advantage has:

(1) the utility model discloses a control pipeline solenoid valve II and pipeline solenoid valve I open and close, methyl alcohol or gasoline fuel get into the fuel supply tank smoothly under the action of gravity to through the real-time supervision of level gauge, can decide the replenishment time and the make-up volume of each fuel, alright accomplish the automatic ratio of required fuel, whole operation process need not artifical the participation, and degree of automation is high.

(2) The utility model provides an oil tank assembly device, simple structure only uses less system spare part, alright solve the problem of methyl alcohol engine cold start to saved parts such as petrol oil pump, petrol oil rail, petrol nozzle, low in production cost, and later maintenance is convenient.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

FIG. 2 is a schematic diagram of the cold start of the middle engine

FIG. 3 is a schematic flow chart of the engine cold start control method of the present invention

Wherein: 1. the system comprises a methanol oil tank 2, a pipeline electromagnetic valve I3, an oil supply oil tank 4, a gasoline oil tank 5, an oil return port 6, a liquid level meter 7, a pipeline electromagnetic valve II 8, an oil outlet 9, an oil supply pump 10, an oil pressure regulating valve 11, an oil rail 12, an ECU 13, an engine coolant temperature sensor 14, an engine air inlet temperature sensor 15, a methanol outlet 16, a methanol inlet 17, a gasoline outlet 18 and a gasoline inlet.

Detailed Description

The present invention will be further described with reference to the following specific embodiments and drawings, it should be noted that M100, M85, and M70 in the text respectively represent that the volume concentration of methanol is 100%, 85%, and 70%, respectively, and M85 methanol gasoline can easily start the engine at a temperature above-20 ℃, and M70 methanol gasoline can easily start the engine at a temperature above-30 ℃, which are exemplified by cold start temperatures of 12 ℃, -20 ℃, -30 ℃ in this application, and do not represent fixed values.

As shown in fig. 1 and fig. 2, the utility model discloses an oil tank assembly device for cold start of methanol engine, comprising a methanol oil tank 1, a gasoline oil tank 4, a fuel supply oil tank 3, a pipeline electromagnetic valve i 2, a pipeline electromagnetic valve ii 7, a fuel feed pump 9 and a liquid level meter 6, the methanol oil tank 1 and the gasoline oil tank 4 are horizontally connected and then are superposed above the fuel supply oil tank 3, the liquid level meter 6 is arranged inside the fuel supply oil tank 3, correspondingly, four liquid level lines are arranged on the fuel supply oil tank 3, which are respectively a liquid level line a, a liquid level line b, a liquid level line c and a liquid level line d from top to bottom, a methanol outlet 15 is arranged at the bottom of the methanol oil tank 1, the height of the methanol outlet needs to be larger than the height of the liquid level line c, a methanol inlet 16 is arranged at the top of the fuel supply oil tank 3, a pipeline is connected between the methanol outlet 15 and the methanol inlet 16, a, the size of the space needs to meet the installation requirement of the pipeline electromagnetic valve I2; the bottom of the gasoline tank 4 is provided with a gasoline outlet 17, the height of the gasoline outlet 17 needs to be higher than the height of a liquid level line, the top of the gasoline supply tank 3 is provided with a gasoline inlet 18, a pipeline is connected between the gasoline outlet 17 and the gasoline inlet 18, a pipeline electromagnetic valve II 7 is arranged on the pipeline, a certain space is arranged between the gasoline outlet 17 and the gasoline inlet 18, and the size of the space needs to meet the installation requirement of the pipeline electromagnetic valve II 7.

The lower half part of the oil supply tank 3 is provided with an oil outlet 8 near the bottom, an oil supply pump 9 is arranged inside the oil tank at the oil outlet 8, the oil outlet 8 is connected with an oil rail 11 through a pipeline, the oil supply pump 9 pumps the oil fuel in the oil supply tank 3 into the oil rail 11 on the engine through the oil outlet 8, the other end of the oil rail 11 is connected with an oil pressure regulating valve 10, the oil outlet of the oil pressure regulating valve 10 is connected with an oil return opening 5 positioned at the upper half part of the oil supply tank 3 and near the top through a pipeline, in the utility model, the oil pressure regulating valve 10 is a valve which is arranged on the oil rail 11 and stabilizes the fuel pressure of the system, once the oil supply pump 9 starts to supply oil, the pressure in the oil rail 11 at the front end of the oil pressure regulating valve 10 is higher than the pressure in the oil return pipe at the rear end of the oil pressure regulating valve 10, the, and is connected with an oil return port 5 at the upper part of an oil supply tank 3 to ensure that the oil pressure in an oil rail 11 reaches stable pressure; the distance between the outlet of the pipeline inserted into the fuel supply oil tank 3 through the gasoline inlet 18 and the adsorption port of the fuel supply pump 9 is less than 5cm, so that after the gasoline enters the fuel supply oil tank 3, a large amount of gasoline is kept near the adsorption port of the fuel supply pump 9, and when the fuel pump works, more fuel containing gasoline components can be pumped out, so that the original M100 methanol fuel in the pipeline and the oil rail 11 is discharged through the oil pressure regulating valve 10 under the action of the pump pressure and flows into the fuel supply oil tank 3 through the oil return pipeline.

In the utility model, a pipeline electromagnetic valve I2, a pipeline electromagnetic valve II 7, an oil supply pump 9 and a liquid level meter 6 are respectively and electrically connected with an ECU 12; the connection mode of the pipeline, the methanol outlet 15, the methanol inlet 16, the gasoline outlet 17, the connection part of the gasoline inlet 18 and the tank body of the oil supply tank 3, the oil outlet 8, the oil return port 5 and the oil pressure regulating valve 10 is threaded connection or quick plug connection.

In the utility model, the liquid level line a meets the gasoline supply amount when the ratio is M70, namely when the liquid level reaches the line, the pipeline electromagnetic valve II 7 is closed, otherwise, the pipeline electromagnetic valve is opened; b, the liquid level line meets the gasoline supply amount when the mixture ratio is M85, namely when the liquid level reaches the line, the pipeline electromagnetic valve II 7 is closed, otherwise, the pipeline electromagnetic valve is opened; the liquid level line is the upper limit of the methanol fuel supplement, once the liquid level reaches the line, the pipeline electromagnetic valve I2 is closed to cut off the methanol supplement so that the oil tank can reserve enough volume for supplementing the gasoline during cold start, and the volume of the methanol fuel below the line is enough to warm up the engine sufficiently, and is more enough to warm up the engine when M70 or M85 fuel is used; and d, a liquid level line is equivalent to an oil tank oil shortage alarm mark, and once the liquid level reaches the line, the fact that the fuel oil in the oil tank is not much is shown, and the pipeline electromagnetic valve I2 needs to be opened in time to supplement the methanol fuel.

In actual operation, as shown in fig. 3, after the whole engine system is powered on, the ECU 12 first detects whether the liquid level M100 of the fuel tank 3 reaches the liquid level c, and if the liquid level M100 of the fuel tank does not reach the liquid level c, the pipeline electromagnetic valve i 2 needs to be opened to replenish the methanol fuel until the liquid level meets the liquid level c, the pipeline electromagnetic valve i 2 is closed, and the methanol fuel replenishment is cut off. Namely, after the system supplies power under any condition, the liquid level of the oil supply oil tank 3 needs to be satisfied at the liquid level c.

When the ECU 12 detects that the temperatures monitored by the engine coolant temperature sensor 13 and the engine intake temperature sensor 14 are both less than or equal to 12 ℃, namely the cold start condition is met, the ECU 12 still closes the oil supply pump 9, closes the control function of the starting motor, keeps the pipeline electromagnetic valve I2 in a closed state, and opens the pipeline electromagnetic valve II 7 to communicate the gasoline tank 4 and the oil supply tank 3. Firstly, the ECU 12 enters the fuel supply oil tank 3 by gravity according to the real-time temperature values monitored by the engine coolant temperature sensor 13 and the engine intake temperature sensor 14, and closes the pipeline electromagnetic valve II 7 when the real-time liquid level reaches the position of a target liquid level a or a target liquid level b, so as to complete the proportioning of M70 or M85 fuel components; next, the ECU 12 opens the fuel supply pump 9 to start running for 5 seconds (which can be calibrated according to the actual conditions such as the length of the fuel pipe, etc., and aims to reduce the residual amount of the M100 fuel in the fuel pipe and the fuel rail 11) so as to discharge the original M100 methanol fuel in the pipeline back to the fuel supply tank 3 (a small amount of M100 remains in the fuel pipe and the fuel rail 11, but this does not affect the starting performance of the engine) by the pressure relief function of the oil pressure regulating valve 10 at the fuel rail 11, and fully circulate and mix the methanol gasoline fuel in the fuel supply tank 3.

The ECU 12 switches the injection amount according to the fuel components, after the engine is successfully started in a cold state, along with the consumption of fuel until the liquid level reaches a liquid level d, the ECU 12 opens the pipeline electromagnetic valve I2 to replenish the methanol fuel, closes the pipeline electromagnetic valve I2 when the liquid level reaches a liquid level c, and always keeps the liquid level between the liquid level c and the liquid level d to replenish M100 methanol fuel for the engine.

When the ECU 12 detects that the temperatures monitored by the engine coolant temperature sensor 13 and the engine intake temperature sensor 14 are both higher than 12 ℃, the system judges that the engine is started at normal temperature, the oil supply pump is started for 5 seconds, if the engine rotates within 5 seconds, the oil supply pump 9 is kept running, and otherwise, the system stops running after 5 seconds. As long as the engine runs, after fuel is pumped out by the fuel supply pump 9, the pipeline electromagnetic valve I2 is opened until the liquid level reaches a liquid level d, the pipeline electromagnetic valve I2 is closed when the liquid level reaches a liquid level c, the liquid level is always kept between the liquid level c and the liquid level d, and M100 methanol fuel is supplemented for the engine.

Claims

1. The utility model provides an oil tank assembly device for methanol engine cold start which characterized in that: the device comprises a methanol oil tank, a gasoline oil tank, an oil supply oil tank, a pipeline electromagnetic valve I, a pipeline electromagnetic valve II, an oil supply pump and a liquid level meter, wherein the oil supply oil tank is respectively connected with the methanol oil tank and the gasoline oil tank; the bottom of gasoline tank is equipped with the petrol export, and fuel feeding tank top is equipped with the petrol entry, is connected with the pipeline between petrol export and the petrol entry, is equipped with pipeline solenoid valve II on the pipeline, and fuel feeding tank the latter half is equipped with the oil-out, is provided with the fuel feed pump in the fuel feeding tank of oil outlet department, and the upper half of fuel feeding tank is equipped with the oil return opening, and oil-out, oil return opening are respectively with the oil rail tube coupling in the engine, and the inside of fuel feeding tank is equipped with the level gauge.

2. The tank assembly device for cold start of methanol engine as claimed in claim 1, wherein: four liquid level lines are arranged on the oil supply tank, and the liquid level lines are a liquid level line, b liquid level line, c liquid level line and d liquid level line from top to bottom.

3. The tank assembly device for the cold start of the methanol engine as set forth in claim 2, wherein: the height of the methanol outlet is greater than that of a liquid level line c, and the space between the methanol outlet and the methanol inlet can meet the installation requirement of a pipeline electromagnetic valve I; the height of the gasoline outlet is larger than that of a liquid level line, a pipeline passing through the gasoline inlet needs to extend into the oil supply tank, and the space between the gasoline outlet and the gasoline inlet can meet the installation requirement of a pipeline electromagnetic valve II.

4. The tank assembly device for cold start of methanol engine as claimed in claim 1, wherein: the distance between the outlet of the pipeline and the adsorption port of the fuel feed pump is less than 5 cm.

5. The tank assembly device for cold start of methanol engine as claimed in claim 1, wherein: the connection mode of the pipeline and the methanol outlet, the methanol inlet, the gasoline outlet, the connection part of the gasoline inlet and the oil supply oil tank body and the oil outlet is threaded connection or quick plug.