CN117616916B

CN117616916B - Marine engine capable of using gasoline and diesel oil as multiple fuels

Info

Publication number: CN117616916B
Application number: CN201318000495.4A
Authority: CN
Inventors: 喻良明; 杨慧明; 杨会忠; 丰建军; 王树勇
Original assignee: Unit 32391 Of Chinese Pla; Zhejiang Painier Technology Inc
Current assignee: Unit 32391 Of Chinese Pla; Zhejiang Painier Technology Inc
Priority date: 2013-01-31
Filing date: 2013-01-31
Publication date: 2015-12-23
Anticipated expiration: 2033-01-31

Abstract

The invention relates to a marine engine capable of using gasoline and diesel oil for multiple fuels, which comprises an oil sprayer arranged on a cylinder cover, wherein an oil sprayer nozzle of the oil sprayer is opposite to the top of a piston, and the oil inlet pressure of the oil sprayer is 180-200 KPa and the injection pressure of the oil sprayer is 9-11 MPa. When the engine uses gasoline, the injector injects with an injection advance angle of 10-20 DEG, the injection time pulse is 8-10 ms, the pulse interval is 12-15 ms, and the single injection pressure is 9.2-9.5 Mpa; when the engine uses diesel oil, the injector injects with the injection advance angle of 10-20 degrees, the injection time pulse is 5-7 ms, the pulse interval is 12-15 ms, the single injection pressure: 10 to 10.5MPa. The invention can be applied to military ships and boats, and ensures that the military tasks are completed smoothly.

Description

Marine engine capable of using gasoline and diesel oil as multiple fuels

Technical Field

The invention relates to a marine engine capable of using gasoline and diesel oil for multiple fuels, in particular to a marine engine which is improved aiming at a two-stroke direct injection engine and is suitable for being applied to military ships and boats.

Background

The two-stroke outboard engine adopted at present is carburetor air intake, and gasoline and engine oil are mixed in a certain proportion and then are mixed with air in a certain proportion through the carburetor to be burnt in a combustion chamber. Such engines burn incompletely and have poor emissions. High oil consumption and low power. Such engines can only use 50:1 (gasoline mixed with engine oil) mixed fuel. The change of the using area is frequent when in war, if the fuel oil supply is abnormal or no gasoline is available on the ship, the common two-stroke outboard engine is used, and the common two-stroke outboard engine cannot be replaced by kerosene, alcohol and the like, so that serious consequences can be caused. It is therefore desirable to provide a marine engine that can use multiple fuels, gasoline and diesel.

Disclosure of Invention

The invention aims to solve the technical problem of providing a marine engine which can be applied to military ships and boats and can use gasoline and diesel oil for multiple fuels.

In order to solve the technical problems, the marine engine capable of using gasoline and diesel oil and multiple fuels comprises: the engine comprises a cylinder body, a crankshaft connecting rod assembly positioned in the cylinder body, a piston positioned in the cylinder body and connected with the crankshaft connecting rod assembly, a crankcase arranged at one end of the cylinder body adjacent to the crankshaft connecting rod assembly, and a cylinder head arranged at one end of the cylinder body adjacent to the piston; the oil injector is arranged on the cylinder cover, the oil nozzle of the oil injector faces to the top of the piston, the oil inlet pressure of the oil injector is 180-200 KPa, and the injection pressure is 9-11 MPa.

The engine oil pump is connected with an oil nozzle on the cylinder body, which is opposite to the piston skirt part in the cylinder body, through an oil pipe; the oil pump is connected with an oil nozzle on the crankcase through another oil pipe.

The oil pump has the use voltage of DC55V, the power of 2W and the flow of 20ml/min.

When the engine uses gasoline, the injector injects with an injection advance angle of 10-20 DEG, the injection time pulse is 8-10 ms, the pulse interval is 12-15 ms, and the single injection pressure is 9.2-9.5 Mpa;

when the engine uses diesel oil, the injector injects with the injection advance angle of 10-20 degrees, the injection time pulse is 5-7 ms, the pulse interval is 12-15 ms, and the single injection pressure is 10-10.5 MPa.

The fuel injector is controlled by an engine management module.

The invention adopts the direct injection technology in the cylinder to control the reasonable oil injection advance angle and the oil injection quantity of the oil injector according to different working conditions, so that the fuel of the engine is combusted with the optimal air-fuel ratio, and the complete combustion of the fuel is achieved. Thereby improving the utilization rate of fuel. The fuel utilization rate of the general engine is 30%, and the fuel utilization rate can reach 70% by adopting the technology. The engine oil of a common two-stroke engine is used in a ratio of 50:1, most of the engine oil cannot be completely combusted and is discharged out of the cylinder body, and serious pollution is caused to the environment. By adopting the direct injection technology in the cylinder, the using amount of engine oil can be reduced by 80 percent, and only a very small amount of engine oil participates in combustion, so that the waste gas generated by the incomplete combustion of a large amount of engine oil is reduced. Because the fuel is burnt with the optimal parameters, the combustion is complete, so that the emission of nitrogen oxides, CO and the like is greatly reduced by 25 percent compared with the same power machine type.

The two-stroke engine using direct injection in a cylinder of gasoline is tested by using diesel oil, the engine runs normally, and when different fuels are used for switching, the engine works stably. Compared with gasoline, the engine output power of the diesel engine is improved by 1 percent through engine test comparison.

Because no gasoline and only diesel oil are arranged on the ship, the outboard engine equipped with the direct-injection two-stroke engine can be used at the moment, the matched light ship can be realized, and the tasks of river crossing logging, reconnaissance searching, mine removal, patrol lifesaving, communication operation and the like are implemented. When the boat is used for rescue and relief work, the carried gasoline is limited, so that the gasoline supply is possibly insufficient, and the outboard engines equipped with other common engines cannot be normally used. The engine provided with the invention can use diesel oil as fuel to replace gasoline, thereby ensuring that the task is successfully completed.

Drawings

Fig. 1 is a schematic structural diagram of a marine engine capable of using multiple fuels, i.e., gasoline and diesel, according to the present invention.

In the figure: 1 is an oil sprayer, 2 is a cylinder cover, 3 is a cylinder body, 4 is an oil pump, 5 is a crankcase, 6 is a crankshaft connecting rod assembly, and 7 is a piston.

Detailed Description

The invention will now be described in further detail with reference to the drawings and examples.

The invention comprises an oil sprayer 1, a cylinder cover 2, a cylinder body 3, an oil pump 4, a crankcase 5, a crankshaft connecting rod assembly 6 and a piston 7. The piston 7 is assembled on the crankshaft connecting rod assembly 6 through a piston pin, and then is inserted into the cylinder block 3, the crankcase 5 is closed, and the crankcase 5 is fastened by bolts. The cylinder head 2 is mounted on the cylinder block 3 by bolts, the fuel injector 1 is locked on the cylinder head 2 by bolts, and the fuel injector 1 is opposite to the top of the piston 7. The oil inlet pressure of the oil sprayer 1 is 180-200 KPa, and the injection pressure is 9-11 MPa.

The oil pump 4 is installed in the oil tank and is connected with an oil nozzle on the cylinder body 3 through an oil pipe, the oil nozzle is opposite to a piston skirt part in the cylinder body 3, and the sprayed oil lubricates the piston 7. The oil pump 4 is connected with an oil nozzle on the crankcase 5 through another oil pipe to lubricate the crankshaft connecting rod assembly 6 rotating at high speed. The oil pump 4 has a voltage of DC55V, a power of 2W and a flow of 20ml/min.

After the engine is started, the piston 7 descends, air in the crankcase 5 is compressed and enters the cylinder block 3, the oil pump 4 supplies oil to the cylinder block 3 and the crankcase 5 according to signals provided by EMM (engine management module), and a sufficient amount of oil is provided for lubricating each kinematic pair. When the piston 7 moves up to a certain position, EMM gives a signal to the fuel injector according to the information of the rotation speed, the air inlet pressure, the engine temperature and the like of the engine, so that the fuel injector 1 carries out gasoline injection at an injection advance angle of 10-20 degrees, the injection time pulse is 8-10 ms, the pulse interval is 12-15 ms, and the single injection pressure is 9.2-9.5 MPa.

When the engine uses diesel oil, the control system automatically executes a program of corresponding fuel by using the change-over switch, and at the moment, the fuel injection parameters of the fuel injector 1 are as follows: the injection time pulse is 5-7 ms, the pulse interval is 12-15 ms, and the single injection pressure is 10-10.5 MPa.

The fuel oil and air sprayed into the combustion chamber are completely mixed, the mixed gas is ignited by spark plug spark, and the high-temperature and high-pressure fuel gas does work on the piston.

Claims

1. A marine engine capable of using gasoline, diesel oil and multiple fuels, comprising: the engine comprises a cylinder block, a crankshaft connecting rod assembly positioned in the cylinder block, a piston positioned in the cylinder block and connected with the crankshaft connecting rod assembly, a crankcase arranged at one end of the cylinder block adjacent to the crankshaft connecting rod assembly, and a cylinder head arranged at one end of the cylinder block adjacent to the piston; the method is characterized in that: the oil injector is arranged on the cylinder cover, an oil nozzle of the oil injector faces to the top of the piston, and the oil inlet pressure of the oil injector is 180-200 KPa, and the injection pressure is 9-11 MPa.

2. A marine engine capable of using multiple fuels, gasoline and diesel, as claimed in claim 1, wherein: the engine oil pump is connected with an oil nozzle of an oil sprayer on the cylinder body, which is opposite to a piston skirt part in the cylinder body, through an oil pipe; and the oil pump is connected with an oil nozzle on the crankcase through another oil pipe.

3. A marine engine operable with multiple fuels, gasoline and diesel, as claimed in claim 2, wherein: the oil pump has the use voltage of DC55V, the power of 2W and the flow of 20ml/min.

4. A marine engine capable of using multiple fuels, gasoline and diesel, as claimed in claim 1, wherein: when the engine uses gasoline, the injector injects with an injection advance angle of 10-20 DEG, the injection time pulse is 8-10 ms, the pulse interval is 12-15 ms, and the single injection pressure is 9.2-9.5 Mpa;

5. A marine engine operable with multiple fuels, gasoline and diesel, as defined in claim 4, wherein: the fuel injector is controlled by an engine management module.