CN1821567A

CN1821567A - Backheating type composite jet burning system for engine

Info

Publication number: CN1821567A
Application number: CNA2005100295812A
Authority: CN
Inventors: 李岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-12
Filing date: 2005-09-12
Publication date: 2006-08-23

Abstract

The back heating composite fuel jetting system for engine features the high temperature fuel oil jetting nozzle set on the cylinder head, the heat collector inside the exhaust pipe connected to the cylinder combustor and the controlled by the exhaust valve, and the fuel oil distributing valve set inside the fuel oil inlet pipeline. The fuel oil from the high pressure oil pump is distributed in the distributing valve, and while partial fuel oil enters to the fuel oil nozzle in traditional mode, the rest is pre-heated in the heat collector before entering to the high temperature fuel oil jetting nozzle. The present invention utilizes the heat energy in the waste gas to raise the temperature of the fuel oil, so as to realize the fast clean combustion with less noise, no smoke and no detonation, and result in raised compression ratio, raised expansion ratio and high heat efficiency. The present invention has the other advantage of capacity of using different kind of fuel in the same engine.

Description

Backheating type composite jet burning system for engine

Technical field

The present invention relates to vehicle, belong to a kind of layout that combines with supplying fuel for internal combustion engine, is a kind of motor backheat composite jet burning system.

Background technique

The used motor of modern vehicle mainly is a stroke piston combustion engine.Comprise body, connecting rod and distribution device in the engine body, cylinder head in the body is provided with a fuel nozzle one (in-cylinder direct injection is an example), a spark plug (spark-ignition engine), an intake valve and an exhaust valve, the engine fuel supply system supplies with high pressure fuel to fuel nozzle, compressed inflammable mixture in the constantly timely in accordance with regulations ignition combustion chamber of compression ignite or spark plug.Fuel burns in cylinder interior, emits a large amount of heats, makes the running of gas expansion throw crank linkage mechanism, and by the driving mechanism driving wheel, makes vehicle driving.General vehicle adopts multi-cylinder, four-stroke, water-cooled engine (petrol engine or diesel engine) more.Piston reciprocal four one way and finish a circuit motor in cylinder are four stroke engine.The work cycle of four stroke engine comprises four working strokes: intake stroke, compression stroke, work done (expansion) stroke and exhaust stroke.Intake stroke is the process that sucks air (inflammable mixture) in cylinder.Compression stroke is that an inflammable mixture that sucks cylinder is compressed in the firing chamber, this moment the volume minimum, pressure and temperature raises.Spray into fuel oil (or plug ignition) when near the time piston arrives top dead center, the fuel oil in the firing chamber burns rapidly or inflammable mixture is lighted by the electrical spark that spark plug sends immediately.Because the rapid burning of mixed gas, temperature sharply raises, and when gases are heated, they expand produces strong explosive force, promote piston and move down by top dead center, and the work done by the connecting rod driven rotary, this is the expansion space stroke of four stroke engine.Near at the end, exhaust valve is opened at expansion space stroke, and waste gas is discharged.This moment, piston was moved up by lower dead center under the effect of crankshaft-flywheel mechanism inertia force, and waste gas is forced to be discharged in the atmosphere by outlet pipe.Motor as mentioned above, the air of inspiration cylinder or fuel-air mixture generally are higher than ambient temperature in intake stroke, though and the fuel oil that has just sprayed into or the mixed gas that is filled in the cylinder are compressed, its volume is dwindled, increase in density, temperature raises, but still has the even or not enough phenomenon of temperature of temperature distributing disproportionation.Problems such as the delay of ignition length of normal generation mixed gas and pinking, cause the compression ratio can not be too high, seriously restricting expansion ratio can't increase, combustion heat energy has 30 percent to be deflated and to take away, and brought the serious environmental pollution problem, and the exhausting heat energy temperature is to utilize temperature gradient about spending up to 900.

Summary of the invention

The purpose of this invention is to provide a kind of motor backheat composite jet burning system that utilizes the cylinder combustion gas that the fuel oil that enters fuel injection nozzle is carried out preheating,, shorten delay of ignition, realize the target of no pinking and high compression ratio to improve oil spout oil temperature.

The technological scheme of the present invention that realizes above-mentioned purpose is, same as the prior art, comprise body in this engine body, connecting rod and distribution device, cylinder head in the body is provided with a fuel nozzle, one spark plug, one intake valve and an exhaust valve, intake valve places firing chamber inner control suction tude, exhaust valve places firing chamber inner control outlet pipe, characteristics of the present invention are, on cylinder head, be provided with a high temperature fuel nozzle in addition, in the outlet pipe that is subjected to exhaust valve control that is connected with combustion chamber of air cylinder, a heat collector is set, in fuel nozzle high-pressure inlet pipeline, a fuel distribution valve is set again, the high pressure fuel of being sent by high pressure oil pump is behind distributing valve, one the tunnel enters fuel nozzle by traditional approach, for starting or low speed usefulness, another route assignment valve control enters the heat collector that places in the outlet pipe, and fuel oil enters the high temperature fuel nozzle after the heat collector preheating, spray with high-voltage high-speed high-temperature evaporation state.Simultaneously, the present invention also is provided with the another oil distributing valve in heat collector the place ahead, and an end and the fuel combination oil pipe of this oil distributing valve join, and the inlet ductwork of the other end and heat collector is joined.This technical characteristics makes incendivity alcohols of the present invention and the multiple liquid fuel of plant wet goods.

Because petroleum resources are more and more nervous; gasoline, diesel-fuel price are more and more expensive; in addition for preventing " global greenhouse effect " and pollution of atmosphere direct infringement to the mankind; countries in the world are also gradually strict to the restriction of automobile emission; therefore; countries in the world have given great concern to seeking alternative energy source and tapping a new source of energy, and the research of novel energy power vehicle is very active, has also obtained many breakthrough achievements.Alcohols of developing at present and plant wet goods liquid fuel belong to substitute fuel, are a kind of fuel that can regeneration, and when using as substitute fuel, motor itself need not do yet start.The present invention is on the basis of aforementioned techniques scheme, and only need heat collector the place ahead in being located at outlet pipe is set up the another oil distributing valve and can be used the liquid substitute fuel with machine.One end and the fuel combination oil pipe of this oil distributing valve join, and the inlet ductwork of the other end and heat collector is joined.

Major advantage of the present invention is, utilizes heat collector to reclaim exhausting heat energy, can utilize exhausting heat energy elder generation heating fuel, makes temperature surpass natural temperature, fulfils the preparation of delay of ignition ahead of schedule, contact rapid the burning with oxygen when fuel ejection spout.Because be burning,, can realize smokeless softly pure quick no knocking combustion so there is not the pinking problem while spraying into.Because there is not pinking,, also just improved the thermal efficiency when that expands so can improve compression ratio.Another remarkable advantage of the present invention is to make the applicable pluralities of fuel of motor on the same stage.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is an embodiment's of incendivity pluralities of fuel of the present invention structural representation.

Embodiment

Specific embodiments of the invention as shown in drawings.

At first see also Fig. 1.See by Fig. 1, present embodiment is provided with a fuel nozzle 7, a spark plug 8 and a suction port 13, an exhaust valve 12 on the cylinder cap of cylinder 17, intake valve 11 places firing chamber inner control suction tude 13 to be connected with firing chamber 10, and exhaust valve 12 places firing chamber inner control outlet pipe to be connected with firing chamber 10.Number in the figure 14 is a piston, and label 15 is a connecting rod, and 16 is bent axle.See that by Fig. 1 present embodiment also is provided with a high temperature fuel nozzle 9 on cylinder head, with combustion chamber of air cylinder 10 in a heat collector 6 is set in the outlet pipe 5 that is connected by exhaust valve 12 control, in fuel nozzle 7 inlet ductwork 1, a fuel distribution valve 3 is set again.The high pressure fuel of being sent by high pressure oil pump is behind distributing valve 3, one the tunnel enters fuel nozzle 12 by traditional approach, for starting or low speed usefulness, another path allocation valve 3 controls enter the heat collector 6 that places in the outlet pipe 5, fuel oil enters high temperature fuel nozzle 9 after heat collector 6 preheatings, spray with high-voltage high-speed high-temperature evaporation state.

The embodiment of the invention by incendivity pluralities of fuel shown in Figure 2 is seen.Present embodiment is provided with a fuel nozzle 7, a spark plug 8 and a suction port 13, an exhaust valve 12 on the cylinder cap of cylinder 17, intake valve 11 places firing chamber inner control suction tude 13 to be connected with firing chamber 10, and exhaust valve 12 places firing chamber inner control outlet pipe to be connected with firing chamber 10.Number in the figure 14 is a piston, and label 15 is a connecting rod, and 16 is bent axle.See that by Fig. 1 present embodiment also is provided with a high temperature fuel nozzle 9 on cylinder head, with combustion chamber of air cylinder 10 in a heat collector 6 is set in the outlet pipe 5 that is connected by exhaust valve 12 control, in fuel nozzle 7 inlet ductwork 1, a fuel distribution valve 3 is set again.The high pressure fuel of being sent by high pressure oil pump is behind distributing valve 3, one the tunnel enters fuel nozzle 12 by traditional approach, for starting or low speed usefulness, another path allocation valve 3 controls enter the heat collector 6 that places in the outlet pipe 5, fuel oil enters high temperature fuel nozzle 9 after heat collector 6 preheatings, spray with high-voltage high-speed high-temperature evaporation state.Also express among Fig. 1, present embodiment is provided with another fuel distributing valve 4 in another kind is provided with the fuel inlet pipe mouth road 2 of fuel combination.The high pressure mixing fuel oil that the fuel combination high pressure oil pump is sent enters the heat collector 6 that places in the outlet pipe 5 behind distributing valve 4, blended fuel oil enters high temperature fuel nozzle 9 after heat collector 6 preheatings, spray with high-voltage high-speed high-temperature evaporation state.

Claims

1, a kind of motor backheat composite jet burning system, cylinder head in the engine body is provided with a fuel nozzle, one spark plug, one intake valve and an exhaust valve, the engine fuel supply system supplies with high pressure fuel to fuel nozzle, it is characterized in that: on cylinder head, set up a high temperature fuel nozzle, with outlet pipe that the control of the indoor exhaust valve of cylinder combustion is connected in a heat collector is set, one fuel distribution valve is set in the fuel nozzle inlet ductwork again, the high pressure fuel of being sent by high pressure oil pump is behind distributing valve, one the tunnel enters fuel nozzle by traditional approach, another road enters the heat collector that places in the outlet pipe, and fuel oil enters the high temperature fuel nozzle after the heat collector preheating.

2, according to the described motor backheat of claim 1 composite jet burning system, it is characterized in that: the heat collector the place ahead in outlet pipe is provided with the another oil distributing valve, and an end and the fuel combination oil pipe of this oil distributing valve join, and the inlet ductwork of the other end and heat collector is joined.