CN218816672U

CN218816672U - Methanol engine and motor vehicle

Info

Publication number: CN218816672U
Application number: CN202222379143.0U
Authority: CN
Inventors: 宋志平
Original assignee: Chongqing Benbiao Power Technology Co ltd
Current assignee: Chongqing Benbiao Power Technology Co ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-04-07
Anticipated expiration: 2032-09-07

Abstract

The utility model relates to a methanol engine and motor vehicle, methanol engine include the engine, the compression ratio of engine is not less than 11.5 and is not more than 12, the air-fuel ratio of engine is not less than 12.5 and is not more than 13.5, the ignition energy of the spark plug of engine is not less than 8.5mJ and is not more than 10mJ. The motor vehicle includes a methanol engine. The utility model discloses a rationally set up the compression ratio of engine, the ignition energy of air-fuel ratio and spark plug for the engine can use methyl alcohol as fuel, is favorable to reducing use cost and pollutant emission reduction.

Description

Methanol engine and motor vehicle

Technical Field

The utility model relates to an engine, concretely relates to methyl alcohol engine and motor vehicle.

Background

Most of the engines in the existing market are gasoline engines and diesel engines.

The chemical equation for gasoline combustion is:

2C ₈ H ₁₈ +25O ₂ ignition- ->16CO ₂ +18H ₂ O

The chemical equation for diesel combustion is:

2C ₁₆ H ₃₄ +49O ₂ ignition- ->32CO ₂ +34H ₂ O

The chemical equation for methanol combustion is:

2CH ₃ OH+3O ₂ ignition-ignition>2CO ₂ +4H ₂ O。

It is clear that methanol combustion emits relatively less CO ₂ And the emission of greenhouse gases can be reduced. Gasoline engines can also emit harmful substances such as CO and nitrogen oxides, diesel engines can also emit harmful substances such as CO, hydrocarbons, nitrogen oxides and carbon powder particles, and the harmful substances can pollute air.

Moreover, the current market price of gasoline is more than eight thousand yuan per ton, the price of diesel oil is more than seven thousand yuan per ton, the price of methanol is more than two thousand yuan per ton, and the price of methanol is low. Moreover, gasoline and diesel oil are non-renewable resources, the price is unstable, and the resources are limited; and the methanol is a renewable resource, has stable price and abundant resources, so the methanol has more excellent economy. Therefore, it is necessary to develop an engine using methanol as fuel.

Disclosure of Invention

The utility model aims at providing a methyl alcohol engine and motor vehicle can regard methyl alcohol as the fuel, is favorable to reducing use cost and pollutant discharge.

A methyl alcohol engine, including the engine, the compression ratio of engine is not less than 11.5 and is not more than 12, the air-fuel ratio of engine is not less than 12.5 and is not more than 13.5.

Optionally, the ignition energy of the spark plug of the engine is not less than 8.5mJ and not more than 10mJ.

Optionally, the ignition energy of the spark plug of the engine is 10mJ.

Alternatively, the compression ratio of the engine is 12.

Optionally, the air-fuel ratio of the engine is 12.5.

Optionally, the engine includes a cylinder head, a cylinder block, a piston, a connecting rod, a crankshaft, an intake valve, an exhaust valve and an ignition plug, the cylinder block has a cylinder hole, the piston is reciprocally disposed in the cylinder hole, the cylinder head is fixedly connected to the cylinder block, the cylinder hole, the piston and the cylinder head define a combustion chamber, the ignition plug is mounted in the cylinder head, the ignition plug is used for igniting the combustion chamber, the cylinder head has an intake passage and an exhaust passage disposed therein, the intake valve provides selective fluid communication between the intake passage and the combustion chamber, the exhaust valve provides selective fluid communication between the exhaust passage and the combustion chamber, the connecting rod is connected between the piston and the crankshaft, and the reciprocating motion of the piston can drive the crankshaft to rotate.

Optionally, the engine further comprises a carburetor, and a nozzle of the carburetor is communicated with the air inlet channel.

The utility model also provides a motor vehicle, including above-mentioned arbitrary methanol engine.

Optionally, the motor vehicle is a motor tricycle.

The utility model discloses a rationally set up the compression ratio of engine, the ignition energy of air-fuel ratio and spark plug for the engine can use methyl alcohol as fuel, is favorable to reducing use cost and pollutant emission reduction.

Drawings

FIG. 1 is a schematic diagram of a methanol engine according to one embodiment;

FIG. 2 is a second schematic diagram of a methanol engine according to an embodiment;

FIG. 3 is a schematic diagram of an electrical start-up system in accordance with an embodiment.

In the figure: 1-cylinder head; 2, a cylinder body; 3, a machine body; 4-cylinder bore; 5, a piston; 6, a combustion chamber; 7, a connecting rod; 8-crankshaft; 9-a spark plug; 10-a magneto; 11-a carburetor; 12-oil needle; 13-a nozzle; 14-CDI igniter; 15-ignition switch; 16-ignition coil.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

A methanol engine as shown in fig. 1 and 2, which comprises an engine, the engine comprises a machine body 3, a cylinder head 1, a cylinder body 2, a piston 5, a connecting rod 7, a crankshaft 8, an inlet valve, an exhaust valve and an ignition plug 9, wherein the cylinder body 2 is fixedly connected to the machine body 3 through bolts, the cylinder head 1 is fixedly connected to the cylinder body 2 through bolts, a cylinder hole 4 is arranged in the cylinder body 2, the piston 5 is reciprocatingly arranged in the cylinder hole 4, the piston 5 and the cylinder head 1 define a combustion chamber 6, the ignition plug 9 is arranged in the cylinder head 1, the ignition plug 9 extends into the combustion chamber 6, the ignition plug 9 is used for igniting the combustion chamber 6, an inlet channel and an exhaust channel are arranged in the cylinder head 1, the inlet valve provides selective fluid communication between the inlet channel and the combustion chamber 6, the exhaust channel provides selective fluid communication between the exhaust channel and the combustion chamber 6, the crankshaft 8 is rotatably arranged in the machine body 3, the connecting rod 7 is connected between the piston 5 and the crankshaft 8, the piston 5 can drive the crankshaft 8 to rotate, the crankshaft 8 to drive the piston 5 to rotate, the crankshaft 8 to rotate, the compression ratio of the engine is not less than 11.5 and not less than 12.5 and not less than 12.12 and not less than 12. By adopting the scheme, the proper compression ratio and air-fuel ratio are determined through a large number of experiments, so that the methanol engine can use methanol as fuel, and the use cost and the pollutant emission are favorably reduced.

In some embodiments, in order to ensure the ignition success rate of the methanol engine, the ignition plug 9 of the engine can be selected as a high-heat-value ignition plug, and the ignition energy of the ignition plug 9 of the engine is not less than 8.5mJ and not more than 10mJ.

As a preferred embodiment, the compression ratio of the engine is 12, the air-fuel ratio of the engine is 12.5, and the ignition energy of the spark plug 9 of the engine is 10mJ.

In some embodiments, the engine further includes a carburetor 11, and a nozzle 13 of the carburetor 11 communicates with the intake passage. In concrete implementation, the air-fuel ratio can be adjusted by adjusting the taper of the oil needle 12 of the carburetor 11 and the hole diameter of the nozzle 13 of the carburetor 11.

In some embodiments, the methanol engine further comprises an electric starting system, the electric starting system adopts a CDI ignition system, as shown in fig. 3, the electric starting system comprises a CDI igniter 14, an ignition coil 16 connected with the CDI igniter 14 through a lead, a spark plug 9 connected with the ignition coil 16 through a lead, a magneto 10 connected with the CDI igniter 14 through a lead, and an ignition switch 15 connected with the CDI igniter 14 through a lead, the magneto 10 is connected with the crankshaft 8, the magneto 10 can drive the crankshaft 8 to rotate, a starting instruction is input by the ignition switch 15, and the CDI igniter 14 controls the magneto 10 to start and the spark plug 9 to ignite, so that the methanol engine is started.

In concrete implementation, the compression ratio can be increased by reducing the volume of the combustion chamber 6. That is, on the basis of the engine in the related art, by adjusting the volume of the combustion chamber 6, a compression ratio of not less than 11.5 and not more than 12 can be achieved; by adjusting the taper of the oil needle 12 of the carburetor 11 and the hole diameter of the nozzle 13 of the carburetor 11, an air-fuel ratio of not less than 12.5 and not more than 13.5 can be achieved. That is, the structure can be adjusted on the basis of the engine in the prior art to obtain the methanol engine proposed by the present application.

The working process of the methanol engine comprises the following steps:

the methanol engine is started by an electric starting system, methanol fuel is combusted in a combustion chamber 6, a piston 5 is pushed to reciprocate by utilizing high-temperature and high-pressure gas generated during combustion, a crankshaft 8 is driven to rotate, and the working cycle comprises the processes of an air inlet process, a compression process, a combustion expansion process, an exhaust process and the like. Of these processes, only the combustion and expansion process is the process of applying work externally, and the other processes are all the processes needed for better implementing the work applying process.

And (3) air inlet process: the piston 5 is driven by the crankshaft 8 to move from the top dead center to the bottom dead center, the intake valve is opened, the exhaust valve is closed, the volume of the upper cavity of the piston 5 is increased due to the downward movement of the piston 5 to form a certain vacuum degree, the mixed gas formed by air and methanol fuel is sucked into the combustion chamber 6 through the intake valve under the action of vacuum suction, when the piston 5 moves to the bottom dead center, the intake valve is closed, the air intake is stopped, and the air intake stroke is finished.

And (3) a compression process: the piston 5 is driven by the crankshaft 8, the piston 5 moves from a bottom dead center to a top dead center, and both the intake valve and the exhaust valve are closed; as the piston 5 moves upward, the volume of the combustion chamber 6 is reduced and the mixture is compressed, and the compression stroke ends when the piston 5 reaches the top dead center.

And (3) combustion and expansion processes: at the end of the compression process, the intake valve and the exhaust valve are both closed, the spark plug 9 generates electric sparks to ignite combustible mixed gas in the combustion chamber 6, the combustible mixed gas quickly ignites and burns to generate high-temperature and high-pressure gas, the piston 5 moves from the top dead center to the bottom dead center under the action of gas pressure, the connecting rod 7 drives the crankshaft 8 to rotate and output outwards to do work, and when the piston 5 moves to the bottom dead center, the combustion and expansion process is finished.

And (3) an exhaust process: when the combustion and expansion process is finished, the exhaust valve is opened, the piston 5 moves from the bottom dead center to the top dead center under the driving of the crankshaft 8, the exhaust gas is discharged out of the combustion chamber 6 from the exhaust valve under the driving action of the residual pressure of the exhaust gas and the piston 5, when the piston 5 moves to the top dead center, the exhaust valve is closed, and the exhaust process is finished.

After the exhaust stroke is finished, the intake valve is opened again, the next working cycle is started again, and the methanol engine operates automatically in such a way repeatedly.

The methanol engine described in any of the above has the following features:

in the aspect of environmental protection: compared with the old gasoline engine, the methanol engine reduces the emission of greenhouse gases after the types of fuels are changed, the gasoline engine also can emit harmful substances such as carbon monoxide, nitrogen oxides and the like, the diesel engine can emit the harmful substances such as carbon monoxide, hydrocarbon, oxynitride, carbon powder particles and the like, the emitted harmful substances can pollute the air, and the methanol engine does not emit the carbon monoxide. Carbon monoxide is a pollutant with strong toxicity to blood and nervous systems, so that the methanol engine has more excellent environmental protection performance.

In the economic aspect: at present, the market price of gasoline is more than eight thousand yuan per ton, the price of diesel oil is more than seven thousand yuan per ton, and the price of methanol is more than two thousand yuan per ton, so that the price is low. And the gasoline and the diesel oil are non-renewable resources, the price is unstable, the resources are limited, while the methanol is renewable resources, the price is stable, the resources are rich, and therefore the economy of the methanol engine is more excellent.

As a preferred embodiment, the motor vehicle is a motor tricycle. The methanol engine that provides in this application has installed and has carried out the real car experiment on motor tricycle, can satisfy motor tricycle's load requirement, to motor tricycle, adopts the methanol engine that provides in this application, is the more superior selection of economic nature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Claims

1. A methanol engine comprises an engine and is characterized in that,

the compression ratio of the engine is not less than 11.5 and not more than 12,

an air-fuel ratio of the engine is not less than 12.5 and not more than 13.5;

the engine comprises a cylinder head, a cylinder body, a piston, a connecting rod, a crankshaft, an air inlet valve, an air outlet valve and an ignition plug, wherein a cylinder hole is formed in the cylinder body, the piston is arranged in the cylinder hole in a reciprocating mode, the cylinder head is fixedly connected to the cylinder body, the cylinder hole, the piston and the cylinder head limit a combustion chamber, the ignition plug is installed in the cylinder head, the ignition plug is used for igniting the combustion chamber, an air inlet channel and an air outlet channel are formed in the cylinder head, the air inlet valve provides selective fluid communication between the air inlet channel and the combustion chamber, the exhaust valve provides selective fluid communication between the air outlet channel and the combustion chamber, the connecting rod is connected between the piston and the crankshaft, and the piston reciprocating motion can drive the crankshaft to rotate;

the engine also includes a carburetor, a nozzle of the carburetor being in communication with the intake passage.

2. The methanol engine of claim 1, wherein an ignition energy of a spark plug of the engine is not less than 8.5mJ and not more than 10mJ.

3. The methanol engine of claim 2, wherein the ignition energy of the engine's spark plug is 10mJ.

4. The methanol engine of claim 1, characterized in that the engine has a compression ratio of 12.

5. The methanol engine of claim 1, wherein the air-fuel ratio of the engine is 12.5.

6. A motor vehicle comprising a methanol engine according to any one of claims 1 to 5.

7. A motor vehicle according to claim 6, characterized in that the motor vehicle is a motor tricycle.