CN202031717U - Gasoline engine modified from diesel engine - Google Patents

Abstract

A gasoline engine modified from a diesel engine comprises a diesel engine, a piston of the diesel engine, a cylinder cover of the diesel engine, a spark plug, an ignition coil and a set of nozzle fuel system of the gasoline engine. The gasoline engine modified from the diesel engine is characterized in that vertical non-through holes are arranged at the center of the piston of the diesel engine; the non-through holes are U-shaped or bowl-shaped with a straight opening; the cylinder cover of the diesel engine is provided with threaded holes of a fuel injector; and the spark plug and the ignition coil are arranged in the threaded holes of the fuel injector of the cylinder cover of the diesel engine. The gasoline engine modified from the diesel engine breaks the traditional theory that the diesel engine and the gasoline engine are not flexible in a state of the prior art; meanwhile, as an electronic control technology is applied to the current emission control field, the national requirement on low emission control can be realized.

Description

A kind of petrol engine that diesel engine is transformed into

Technical field

The utility model relates to a kind of petrol engine, especially relates to a kind of petrol engine that diesel engine is transformed into.

Background technique

At present, domestic, international general understanding is that diesel engine is the compression ignite technology, and petrol engine is a combustion technology, and the application technology of two kinds of products is not replaceable fully.

Under the situation of national Abgasgesetz increasingly stringent, existing many maximum discharge diesel engine face the restriction of emission compliance.Under the prior art, the low emission control technique of many diesel oil is all by international giant, grasp as companies such as Bosch, Delphi, continents, the high-pressure common rail product price of one cover state four is higher than the value of motor itself far away, the destiny of homemade diesel engine is being held firmly by these foreign technology type companies, and low emission is Chinese the only way which must be passed forever.Therefore, if the rules of national discharging aspect upgradings is too fast, the awkward situation of a large amount of diesel engine enterprise closes of China facing then.

And the utility model has solved a kind of outlet of these diesel engine maximum discharge enterprises, this diesel engine is changed to actual controllable electronic control type petrol engine, further be the research and development and the popularization (gasoline and LPG, gasoline and CNG, gasoline and LNG or the like) that can realize duel fuel engine, the state-run enterprise of suitable especially those old types, agricultural, engineering machinery diesel engine company product up-gradation transformation have extremely important commercial value.

Summary of the invention

The purpose of this utility model provides a kind of petrol engine that diesel engine is transformed into, pass through the utility model, can with no matter engine cylinder cover and motor body be that integral type or split type diesel engine all are transformed into qualified petrol engine, for national and enterprise have saved the energy, material, avoided diesel engine not suffer from scrapping because of meeting the reduction of discharging standard.

For this reason, the utility model provides a kind of petrol engine that diesel engine is transformed into:

A kind of petrol engine that diesel engine is transformed into, comprise diesel engine, diesel motor piston, diesel engine cylinder cap, spark plug and spark coil, the petrolic fuel nozzle of cover system, it is characterized in that, there is vertical non-through hole in described diesel motor piston central authorities, the U type that is shaped as of wherein said non-through hole or straight mouthful of bowl type; Described diesel engine cylinder cap has the helical oil injector hole, and described spark plug and spark coil are installed in the helical oil injector hole of described diesel engine cylinder cap.

Wherein, the volume of the non-through hole that the piston central authorities of described diesel engine form meets the following conditions: the volume of final non-through hole and the combustion chamber volume sum of former diesel engine are the petrolic combustion chamber volume of transforming out, and the cylinder total volume of former diesel engine should satisfy petrolic compression ratio range with the ratio of the petrolic combustion chamber volume of transforming out.

Preferably, described diesel engine is transformed in the petrolic method, a circular cone that raises up is arranged in the middle of the bottom of described non-through hole.

Preferably, described diesel engine is transformed in the petrolic method, comprises petrol jet in the described petrolic fuel nozzle system.

Preferably, described a kind of petrol engine that diesel engine is transformed into, also comprise the gasoline ignition system of an independent cover EFI that installs additional, comprise the automobile specified single-chip microcomputer ECU that has On-Board Diagnostics (OBD) OBD function in the gasoline ignition system of described EFI.

Preferably, the described petrol engine that diesel engine is transformed into, the gasoline ignition system of described EFI is installed in the former diesel engine cylinder cover, and removes former diesel oil supply system, comprises the diesel oil high pressure fuel pump that removes former diesel engine.

According to another program of the present utility model, also provide a kind of petrol engine that diesel engine is transformed into:

A kind of petrol engine that diesel engine is transformed into, comprise diesel engine, diesel motor piston, diesel engine cylinder cap, spark plug and spark coil, the petrolic fuel nozzle of cover system, it is characterized in that there is vertical non-through hole in described diesel motor piston central authorities; Described diesel engine cylinder cap has boring, embeds the copper sheathing with screw thread in the boring of cylinder cap in the non-integral type diesel engine, and described spark plug and spark coil are installed in the described copper sheathing with screw thread.

Wherein, the volume of the non-through hole that the piston central authorities of described diesel engine form meets the following conditions: the volume of final non-through hole and the combustion chamber volume sum of former diesel engine are the petrolic combustion chamber volume of transforming out, and the cylinder total volume of former diesel engine should satisfy petrolic compression ratio range with the ratio of the petrolic combustion chamber volume of transforming out.

Preferably, described diesel engine is transformed in the petrolic method, a circular cone that raises up is arranged in the middle of the bottom of described non-through hole.

Preferably, described diesel engine is transformed in the petrolic method, comprises petrol jet in the described petrolic fuel nozzle system.

Preferably, described a kind of petrol engine that diesel engine is transformed into, also comprise the gasoline ignition system of an independent cover EFI that installs additional, comprise the automobile specified single-chip microcomputer ECU that has On-Board Diagnostics (OBD) OBD function in the gasoline ignition system of described EFI.

The utility model has been broken under the prior art form, and diesel engine and petrol engine can not flexible traditional theories.And electron controls technology is applied to current emission control field, has realized the demand of country, meet the environmental protection policy of country for low emission control.

The existing low emission technology under the nail technology, diesel engine be in order to improve discharge control level, has only the buying Fuel Control System to external emission control Expert Co., Ltd, for example is: the buying of companies such as Bosch, Delphi.Seriously strengthened the dependence and the economic burden of Chinese Enterprise, the volume of production and marketing of enterprise will seriously be affected, and a large amount of foreign exchanges have flowed into abroad.

490 diesel engines with the fork truck industry are example: the price that diesel engine is sold to fork truck main engine factory is about 6800RMB, and the product price of the diesel oil emission control technique of a cover state four directions case is more than 20000RMB, substantially be 3 times of diesel engine body, seriously influence the sale of low-emission diesel, finally like this caused declining of national diesel engine enterprise.

Diesel engine enterprise, spend not quite and diesel engine changes the technology spending of petrol engine, totally increase cost and decide according to emission request.If realize that diesel oil changes petrol engine, state-two's emission request concerning them, increases cost about 3000RMB.

Therefore, advantage compared with prior art is as follows:

1, the energy-saving and emission-reduction policy that meets country reduces the discharging of carbon granule thing, and is favourable to environmental protection.

2, compare the not high and technology simple possible of the cost of gasoline electric injection with other diesel oil control techniques.

3, power is big: the petrol engine motor that adopts the diesel engine renovation technique to form, and power and moment of torsion have acted on the characteristic of diesel engine, and power character is not less than the diesel engine of homotype after the motor transformation, is more suitable for the user of the big power of demand.

4, the life-span is long: the lubrication state that helps improving motor.Few carbon distribution during because of burning, lubricating status can prolong the working life of motor well more than one times, and prolonged the service time of machine oil, reduces the maintenance cost of motor.

5, noise is low: because compression ratio reduces, be difficult for phenomenon of detonation takes place, can obviously reduce the noise of diesel engine.

Description of drawings

Fig. 1 is for embedding the schematic representation of the structure of the copper sheathing with screw thread in the cylinder cap boring in the non-integral type diesel engine according to a mode of execution of the present utility model;

Fig. 2 is the sectional view of former diesel engine piston;

Fig. 3 for form after the diesel engine piston transformation according to a kind of mode of execution of the present utility model the sectional view of piston of gasoline engine;

Fig. 4 is a kind of profile of diesel fork lift trucks motor;

Fig. 5 is the profile of the improved gasoline forklift engine of diesel fork lift trucks motor shown in Figure 4, has shown the Transform Type design part of engine body.

Fig. 6 is the profile of the improved gasoline forklift engine of diesel fork lift trucks motor shown in Figure 4, has shown the constituent element (giving an example with four-cylinder) of electronic engine management system.

Number description:

Cylinder lid 1, spark-plug hole 2, diesel oil high pressure nozzle 3, diesel oil high pressure fuel pump 4, diesel engine (improved petrol engine) 5, former diesel oil piston 6, diesel oil cylinder head 7, diesel oil high pressure fuel pump plug 8, gasoline electric injection system (premixing mode) 9, gasoline engine cylinder lid 10, piston of gasoline engine 11, engine computer 12, E-Gas 13 (drag-line control being changed to the signal source of CAN bus arrangement), engine wiring harness 14, gasoline igniting spark plug 15, another E-Gas (control engine speed and valve opening) 16, water temperature induction plug 17, speed probe 18, signal panel 19, high voltage wire 20.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail, can implements according to this with reference to the specification literal to make those skilled in the art.

The utility model provides a kind of petrol engine that diesel engine is transformed into, comprise diesel engine, diesel motor piston, diesel engine cylinder cap, spark plug and spark coil, the petrolic fuel nozzle of cover system, it is characterized in that, there is vertical non-through hole in described diesel motor piston central authorities, the U type that is shaped as of wherein said non-through hole or straight mouthful of bowl type; Described diesel engine cylinder cap has the helical oil injector hole, and described spark plug and spark coil are installed in the helical oil injector hole of described diesel engine cylinder cap.

Piston central openings at diesel engine, promptly begin milled holes from piston head along the piston rod direction, milling always to piston rod away from till near the end of piston head, finally the piston central authorities at diesel engine form vertical non-through hole, the U type that is shaped as of wherein said non-through hole or straight mouthful of bowl type;

Cylinder cap to diesel engine is transformed, and the oil injector hole on the cylinder cap of diesel engine is carried out reaming, processes screw thread after the reaming to form spark-plug hole, and spark plug and spark coil are installed in spark-plug hole;

Supply system to diesel engine is transformed, and removes former diesel oil supply system, installs the petrolic fuel nozzle of cover system additional;

Wherein, the volume of the non-through hole that the piston central authorities of described diesel engine form meets the following conditions: the volume of final non-through hole and the combustion chamber volume sum of former diesel engine are the petrolic combustion chamber volume of transforming out, the cylinder total volume of former diesel engine should satisfy petrolic compression ratio range with the ratio of the petrolic combustion chamber volume of transforming out, promptly known former diesel engine parameter: cylinder diameter D piston stroke 1 compression ratio ε

1. former diesel engine, when piston arrived lower dead center, single combustion chamber of air cylinder volume was V ₁

Piston is during to top dead center, and single combustion chamber of air cylinder volume is V ₂

$\frac{V_1}{{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_2}=\mathrm{\&epsiv;}$

$V_1-{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=\frac{\mathrm{\&pi;}{D}^{2}l}{4}$

Then ${\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=\frac{\mathrm{\&pi;}{D}^{2}l}{4(\mathrm{\&epsiv;}-1)}$

2. behind the piston remodeling, new compression ratio is ε ' (compression ratio diminishes)

When piston arrived lower dead center, single combustion chamber of air cylinder volume was V ₁'

When piston arrived lower dead center, single combustion chamber of air cylinder volume was V ₂'

$\frac{{\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_1^{\&prime;}}{{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_2^{\&prime;}}={\mathrm{\&epsiv;}}^{\&prime;}$

${\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_1^{\&prime;}-{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_2^{\&prime;}=\frac{\mathrm{\&pi;}{D}^{2}l}{4}$

Then ${\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_2^{\&prime;}=\frac{\mathrm{\&pi;}{D}^{2}l}{4({\mathrm{\&epsiv;}}^{\&prime;}-1)}$

Then piston combustion hole volume-variation is:

$\mathrm{\&Delta;V}={\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_2^{\&prime;}-{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HSA00000385711500011.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=\frac{\mathrm{\&pi;}{D}^{2}l}{4}(\frac{1}{{\mathrm{\&epsiv;}}^{\&prime;}-1}-\frac{1}{\mathrm{\&epsiv;}-1}).$

3. measuring former diesel engine piston flare pit volume is V ₀

Then new piston combustion hole volume should be: V ₀'=V ₀+ Δ V.

As shown in Figure 4, Fig. 4 is a kind of profile of diesel fork lift trucks motor.In Fig. 4, the piston head of the diesel oil piston 6 of diesel engine 5 is recessed, can be ω type, shallow basin type, ball-type or u type, and diesel oil cylinder head 7 is arranged on the top of cylinder body, and diesel oil high pressure nozzle 3 is arranged on the diesel oil cylinder head 7.And diesel oil high pressure fuel pump 4 is arranged in the cylinder block, is the important component part of diesel oil supply system.

As shown in Figure 5, Fig. 5 is the profile of the improved gasoline forklift engine of diesel fork lift trucks motor shown in Figure 4, has shown the Transform Type design part of engine body.In Fig. 5, gasoline electric injection system (premixing mode) 9 is installed in the cylinder head of diesel engine (improved petrol engine) 5, the gasoline ignition system of EFI just, the gasoline engine cylinder lid of transforming out 10 is arranged on the top of cylinder body, gasoline engine cylinder lid 10 oil nozzle that gets on changes to spark-plug hole, piston of gasoline engine 11 is to transform on the basis of former diesel engine piston 6, particularly exactly the recessed degree of depth is strengthened at former diesel engine piston top, the ω type of original diesel engine, shallow basin type, ball-type etc. are all changed to straight mouthful of bowl type or U type.Diesel oil high pressure fuel pump plug 8 has substituted former diesel oil high-pressure service pump.

As shown in Figure 6, Fig. 6 is the profile of the improved gasoline forklift engine of diesel fork lift trucks motor shown in Figure 4, has shown the constituent element (giving an example with four-cylinder) of electronic engine management system.Engine computer 12 among Fig. 6 is used to control the electronics of motor, and links to each other with E-Gas 13, and E-Gas 13 changes to drag-line control the signal source of CAN bus arrangement.Engine wiring harness 14 couples together each parts.The gasoline igniting is arranged on the cylinder head with spark plug 15.Another E-Gas (control engine speed and valve opening) 16 is used to control engine speed and valve opening; Water temperature induction plug 17 is used to measure.Also comprise speed probe 18, signal panel 19 and high voltage wire 20 in the electronic control system.

One circular cone that raises up is arranged in the middle of the bottom of described non-through hole.

Comprise petrol jet in the described petrolic fuel nozzle system.

In diesel engine, install the gasoline ignition system of a cover EFI separately additional, comprise the automobile specified single-chip microcomputer ECU that has On-Board Diagnostics (OBD) OBD function in the gasoline ignition system of described EFI.

The gasoline ignition system of described EFI is installed in the former diesel engine cylinder cover, and removes former diesel oil supply system, comprises the diesel oil high pressure fuel pump that removes former diesel engine.

According to another program of the present utility model, also provide a kind of petrol engine that diesel engine is transformed into:

A kind of petrol engine that diesel engine is transformed into, comprise diesel engine, diesel motor piston, diesel engine cylinder cap, spark plug and spark coil, the petrolic fuel nozzle of cover system, it is characterized in that there is vertical non-through hole in described diesel motor piston central authorities; Described diesel engine cylinder cap has boring, embeds the copper sheathing with screw thread in the boring of cylinder cap in the non-integral type diesel engine, and described spark plug and spark coil are installed in the described copper sheathing with screw thread.

Piston to diesel engine is transformed, and in the piston central openings of diesel engine, promptly begins boring along the piston rod direction from piston head, be drilled into always piston rod away from till near the end of piston head, finally the piston central authorities at diesel engine form vertical non-through hole;

Cylinder cap to diesel engine is transformed, and in the cylinder cap boring of diesel engine, embeds the copper sheathing with screw thread in the cylinder cap boring in the non-integral type diesel engine, to form spark-plug hole, spark plug and spark coil is installed in spark-plug hole; As shown in Figure 1, installed spark-plug hole 2 additional on the cylinder lid 1.

Supply system to diesel engine is transformed, and removes former diesel oil supply system, installs the petrolic fuel nozzle of cover system additional;

Wherein, the volume of the non-through hole that the piston central authorities of described diesel engine form meets the following conditions: the volume of final non-through hole and the combustion chamber volume sum of former diesel engine are the petrolic combustion chamber volume of transforming out, and the cylinder total volume of former diesel engine should satisfy petrolic compression ratio range with the ratio of the petrolic combustion chamber volume of transforming out.

To the transformation of diesel engine piston as shown in Figures 2 and 3, Fig. 2 is the sectional view of former diesel engine piston; Fig. 3 for form after the diesel engine piston transformation according to one embodiment of the present invention the sectional view of piston of gasoline engine.

One circular cone that raises up is arranged in the middle of the bottom of described non-through hole.

Comprise petrol jet in the described petrolic fuel nozzle system.

Comprise the automobile specified single-chip microcomputer ECU that has On-Board Diagnostics (OBD) OBD function in the gasoline ignition system of described EFI.

The utility model is to the brand-new design product of structure is arranged:

The structure of a, product

Are made up of 3 major parts: body is transformed part; The gasoline common rail system; Automatically controlled and ignition system.Thoroughly the diesel engine of high compression ratio is changed to the petrol engine that can be made up of advanced electronic parts and components, sensor, ECU engine computer, working mechanism is changed in order to light by compression ignite.

Inventive point is: at first, the diesel engine body is made an amendment, the spark plug replacement is installed in former diesel fuel nozzle position, and change piston, reduction compression ratio, suitable more gasoline work; Then, install the Fuel Petroleum system of a cover EFI additional; At last, the igniting and the control strategy system that need the automatically controlled ECU of a cover.Like this, a diesel engine is with regard to the electronic injection gasoline engine of change for an advanced person.

B, design principle

The principle of design is according to the requirement of petrol engine the product configurations of diesel engine to be improved successively one by one, and ignition system adopts advanced electrical apparatus element to realize.Have many identical points to determine this transformation that certain basis is arranged between gas engine and the diesel engine:

The effect of essential structure and critical piece is identical;

Each work cycle all is four strokes, all is externally to do work other 3 by expansion stroke to rely on inertia to finish;

In each stroke, reciprocal 2 times of piston, flywheel rotated for 2 weeks, does work 1 time, or the like.

And difference is: at first, both structure differences, cylinder of diesel engine is stamped oil nozzle, and gasoline engine cylinder cover is equipped with spark plug;

Both piston combustion bowls are completely different;

Both fuel differences, diesel engine uses diesel oil, and petrol engine uses gasoline;

Fuel injects different, and petrol engine is to adopt the premixing form, sucks gasoline and AIR MIXTURES from intake manifold; Diesel engine then is that the mode of direct injection enters engine body, the just air that intake manifold sucks;

Working mechanism difference, diesel engine are compression ignites, and petrol engine is lighted.

Therefore, reinvent according to petrolic demand at the structural principle of diesel engine, the enforcement principle of diesel oil changes vapour scheme that Here it is, overall plan sees Fig. 4, Fig. 5 for details.The control system principle of automatical control system is seen Fig. 6.

The scheme and the process step of concrete enforcement design development are as follows:

Diesel engine transform the EFI gas engine as, its concrete structure design for scheme is changed and is comprised that the former diesel oil cylinder cap of Transform Type design is a gasoline engine cylinder cover (referring to figure four), (the cylinder cap bottom surface is flat to change diesel oil piston, piston head recessed (ω type, shallow basin type, ball-type, u type)) is gas piston (u type or straight mouthful of bowl type are referring to figure five); Increase gas supply system, ECU automatical control system, spark plug, high voltage wire, spark coil etc. simultaneously.

1, specifically implement as follows: remove former diesel engine piston, change to piston of gasoline engine, purpose is to reduce compression ratio, suitable more gasoline work.The compression ratio of diesel oil is 16～24, but gasoline generally has only 7～10, so compression ratio must descend.But the firing chamber of diesel engine is greatly different with gasoline, is straight mouthful of bowl type or U type in order to realize the purpose of combustion chamber volume increase, only to dig on the basis of former diesel oil piston being whittled into.The design matching principle of gasoline piston is: realize faster and burn, shorten flame travel more fully to reduce tendency to detonate.

The design of compression ratio is of paramount importance in all hardware designs, general scheme is the label difference according to gasoline: No. 90, No. 93, No. 97 difference, the compression ratio of a benchmark of proposal plan, then around the many groups of reference value design even tens groups of compression ratio schemes, on engine dynamometer, check successively, under the condition of the same race, do not have the on-the-spot generation of pinking, the compression ratio of the highest power, minimum row's temperature is defined as the last configuration of bare machine.Remove former diesel engine cylinder cover, change is equipped with the gasoline cylinder cap of spark plug, and spark plug generally is contained in former diesel fuel nozzle position, and purpose is can electronic ignition.Common practices is to utilize former diesel oil cylinder cap, changes former oil injector hole into spark-plug hole by reaming, machining screw, and spark plug and spark coil are installed; If the oil sprayer mouth is not an integral structure, need design edge copper sheathing structure on cylinder cap, the gasoline spark plug is installed, so just change to the Spark ignition type structure.If the just direct installation and processing screw thread of integral type.

Install a cover gasoline spray rail fuel system when removing former diesel oil supply system additional, comprise the one group of petrol jet that is used for accurately adjusting fuel.

Install the gasoline ignition system of a cover EFI separately additional, comprise the ECU that has the OBD function, be used for the control and the control exhaust emissions of the interior gasoline injection amount of machine of motor.

At last, carry out the ECU computer of every engine pedestal complete machine performance targetedly and demarcate, program step is played as follows:

Startability demarcation, idling and the demarcation of the highest empty wagons rotating speed, estimated value demarcation (intake temperature, cylinder head temperature and exhaust back pressure etc.), charging efficiency table demarcation (all operating point charging efficiencies), external characteristic curve demarcation, Economy demarcation (mixture strength and ignition advance angle), fuel are controlled the demarcation of open loop table, speed governing demarcation, transient state demarcation, are discharged demarcation (mixture strength and ignition advance angle), fault demarcation.After having finished relevant complete vehicle test, finally could be with product marketization.

Although embodiment of the present utility model is open as above, but it is not restricted to listed utilization in specification and the mode of execution, it can be applied to various suitable the field of the invention fully, for those skilled in the art, can easily realize other modification, therefore under the universal that does not deviate from claim and equivalency range and limited, the legend that the utility model is not limited to specific details and illustrates here and describe.

Claims (9)

1. petrol engine that diesel engine is transformed into, comprise diesel engine, diesel motor piston, diesel engine cylinder cap, spark plug and spark coil, the petrolic fuel nozzle of cover system, it is characterized in that, there is vertical non-through hole in described diesel motor piston central authorities, the U type that is shaped as of wherein said non-through hole or straight mouthful of bowl type; Described diesel engine cylinder cap has the helical oil injector hole, and described spark plug and spark coil are installed in the helical oil injector hole of described diesel engine cylinder cap.

2. a kind of petrol engine that diesel engine is transformed into as claimed in claim 1 is characterized in that, a circular cone that raises up is arranged in the middle of the bottom of described non-through hole.

3. a kind of petrol engine that diesel engine is transformed into as claimed in claim 1 is characterized in that, comprises petrol jet in the described petrolic fuel nozzle system.

4. a kind of petrol engine that diesel engine is transformed into as claimed in claim 1, it is characterized in that, also comprise the gasoline ignition system of an independent cover EFI that installs additional, comprise the automobile specified single-chip microcomputer ECU that has On-Board Diagnostics (OBD) OBD function in the gasoline ignition system of described EFI.

5. a kind of petrol engine that diesel engine is transformed into as claimed in claim 4, it is characterized in that, the gasoline ignition system of described EFI is installed in the former diesel engine cylinder cover, and removes former diesel oil supply system, comprises the diesel oil high pressure fuel pump that removes former diesel engine.

6. petrol engine that diesel engine is transformed into, comprise diesel engine, diesel motor piston, diesel engine cylinder cap, spark plug and spark coil, the petrolic fuel nozzle of cover system, it is characterized in that there is vertical non-through hole in described diesel motor piston central authorities; Described diesel engine cylinder cap has boring, embeds the copper sheathing with screw thread in the boring of cylinder cap in the non-integral type diesel engine, and described spark plug and spark coil are installed in the described copper sheathing with screw thread.

7. a kind of petrol engine that diesel engine is transformed into as claimed in claim 6 is characterized in that, a circular cone that raises up is arranged in the middle of the bottom of described non-through hole.

8. a kind of petrol engine that diesel engine is transformed into as claimed in claim 6 is characterized in that, comprises petrol jet in the described petrolic fuel nozzle system.

9. a kind of petrol engine that diesel engine is transformed into as claimed in claim 6, it is characterized in that, also comprise the gasoline ignition system of an independent cover EFI that installs additional, comprise the automobile specified single-chip microcomputer ECU that has On-Board Diagnostics (OBD) OBD function in the gasoline ignition system of described EFI.

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