CN203906155U

CN203906155U - Gasoline rotor engine

Info

Publication number: CN203906155U
Application number: CN201320836312.7U
Authority: CN
Inventors: 潘剑锋; 姚嘉琪; 范宝伟; 肖曼
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2013-12-18
Filing date: 2013-12-18
Publication date: 2014-10-29
Anticipated expiration: 2023-12-18

Abstract

The utility model belongs to the technical field of an engine, and particularly relates to a gasoline rotor engine. The gasoline rotor engine is characterized in that an oil sprayer is arranged at one side of a cylinder body, which is provided with a gas inlet passage, of the gasoline rotor engine, the displacement from the position of the oil sprayer to an axial line of a short shaft of the cylinder is L, a specific value of L/(R+e) is 4/5 to 5/6, R is the generating radius of the gasoline rotor engine, and e is the eccentric distance of the gasoline rotor engine. Finally, compared with the arrangement of an oil sprayer of an original rotor engine, according to the gasoline rotor engine disclosed by the utility model, the highest combustion pressure can be increased by 6%-10%, thus high combustion efficiency can be realized, and the heat efficiency can be facilitated to be increased.

Description

A kind of gasoline rotary engine

Technical field

The utility model belongs to technical field of engines, is specifically related to fuel supply system for internal combustion engine device, is the improved design of carrying out based on improving gasoline rotary engine combustion efficiency, to promote the combination property of motor.

Background technique

In-cylinder direct injection technology, until eighties of last century just starts to use the nineties, enters European market for 1997, utilizes in-cylinder direct injection technology still in research and exploratory stage for the rotary engine in market; In-cylinder direct injection general with high-pressure common rail technical tie-up use, within the scope of whole engine characteristics, there is good adaptability to reach.

In-cylinder direct injection is arranged between inlet and exhaust valve by oil nozzle, and high pressure fuel is directly injected to firing chamber and carries out efficient burning, fuel consumption rate under high running on the lower load condition is reduced, the technology of power-lift; In the motor of in-cylinder direct injection, directional flow is being born guiding and the motion forwarding function of mixed gas; Therefore, the mixed combustion of mobile shape coupled engines has material impact, and the mounting point of an oil sprayer important ring wherein just.

For the oil sprayer mounting point of original rotary engine, position apart from spark plug is far away, be easy to the cooling of spark plug, in addition, structure is comparatively speaking comparatively simple, and oil sprayer and suction port and relief opening arrangement are tight, but, longitudinally cooling having any problem, intake duct and air outlet flue are restricted, make organism temperature too high; Oil sprayer heat load is large, can in the short period, form carbon deposit; In cylinder wall, mixed gas flows and fails compared with the streamline of good utilisation cylinder body, and mixed gas atomizing effect and Air Distribution do not reach optimum efficiency.Spray in the later stage of compression stage especially, may cause burning to be caught fire and the increase of Soot Formation amount, therefore needing has higher jet pressure.

Oil sprayer is the core component of rotary engine fuel supply system, its place, position, fuel gas injection direction and injection timing are very large on the combustion process impact of motor, to the power character of whole rotary engine and discharged significance effect, also significantly affect the discharge of motor; Therefore, the utility model improves and adjusts on traditional oil sprayer mounting arrangements position.

Summary of the invention

The purpose of this utility model is to provide a kind of gasoline rotary engine, comprise oil sprayer, it is characterized in that: oil sprayer is arranged in to cylinder body one side that gasoline rotary engine has intake duct, and its positional distance cylinder body minor axis axis shift is L, and L/ (R+e) ratio is between 4/5 ~ 5/6; The displacement of the positional distance cylinder body minor axis axis of described oil sprayer is perpendicular to cylinder body minor axis axis.

Particular location requires to finely tune according to spraying, and oil sprayer position can not be too near to long axis direction cylinder body end points, can cause oil spout to be injected in combustion chamber wall surface, fully atomization; Take care of yourself again on injection direction and there is larger space, ensure enough penetration distances, behind definite oil sprayer casing wall position, by fuel injector nozzle perpendicular to cylinder body long axis direction.

Described R is gasoline rotary piston machine generating radius, and e is gasoline rotary piston machine throw of eccentric; Finally be compared to former oil sprayer and arrange rotary piston machine, burning maximum pressure can increase by 6% ~ 10%, thereby realizes efficient combustion, promotes the raising of the thermal efficiency.

Technological merit of the present utility model is:

1, in the utility model design, change original oil sprayer mounting point, change the Air Distribution in firing chamber by changing gas injection firing angle, make full use of the bags, in cavity volume, realize the efficient burning of large flow, realize better the diffusivity of burning.

2, because oil sprayer is positioned on the casing wall of air inlet reveal, course of injection is mainly in the charging stage, and now inner pressure of air cylinder is no better than barometric pressure, and injection back pressure is little, has reduced the installation requirement to oil sprayer, and Economy is better.

3, utilize self camber line and its good slickness of rotary engine casing wall, in conjunction with the principle of one-way flow feature and tangential standing vortex in rotary engine cylinder, adopt the downstream direction in Fig. 1 to spray combustion gas, burner oil concentrates on the middle front part of combustion recess, significantly shorten propagation of flame distance, reduce detonation tendency; Make part streams touch wall reflection simultaneously, strengthen atomization intensity, little oil droplet has larger surface area, thereby heat absorption is faster, and evaporation is better, and the formation time of mixed gas obviously shortens, and mixed gas quality improves, and promotes burning largelyr.

4, utilize high velocity air to spray the tangential velocity producing, under differential pressure action in firing chamber, mixed gas produces curvilinear motion, strengthens the disturbance of boundary layer fluid and the coupling of boundary layer and main cyclone, reach on the whole the effect in attenuate boundary layer, thereby improve burning energy diffusion.

5, owing to having adopted downstream direction to spray and in conjunction with tangential standing vortex principle, having strengthened the air motion in cylinder, promote the formation in air-flow whirlpool in firing chamber, thereby accelerate velocity of propagation of flame, promote the stable burning fast of combustion gas, improve the thermal efficiency.

6, because injection direction points near spark plug, this fuel injection method can ensure to have the combustion gas of reasonable concentration near spark plug, thereby ensures that engine reliable catches fire; Can also utilize the one-way flow characteristic of rotary engine to make combustion gas concentrate on the middle front part of firing chamber, significantly shorten flame travel, reduce combustion duration and tendency to detonate, improve combustion efficiency, improve the performance of motor.

Brief description of the drawings

Fig. 1 is the utility model 218 rotor motor oil spout moment rotor present position schematic diagram.

Fig. 2 is the utility model 218 rotor engine spark plug igniting moment rotor present position schematic diagram.

In figure, A position is 218 rotor engine fuel injector mounting points.

In figure, B position is 218 rotor engine spark plug present positions.

In figure, C position is 218 rotor engine intake positions.

In figure, D position is 218 rotor engine exhaust port positions.

In figure, F position is 218 rotor engine rotors.

Embodiment

In conjunction with the utility model, gasoline rotary piston machine to 218 series models carries out design verification, and table one is this rotary engine basic parameter, and it is 205mm apart from cylinder body minor axis axis shift for A, with the ratio of generating radius and throw of eccentric value sum be 0.82, in setting between scope; In conjunction with Fig. 1, oil sprayer is arranged on the cavity casing wall of former rotary engine near intake valve to i.e. A position in Fig. 1; Oil sprayer injection direction is perpendicular to major axis, and spray cone angle is 30 ° of CA, carries out high velocity jet along rotor sense of rotation at the front 415 ° of CA of compression top center, sprays and continues to the front 360 ° of CA of compression top center, and rotary engine is carried out time of ignition as shown in Figure 2; Through the emulation of Fluent modeling Simulation, be 0.5 in rotary engine equivalent proportion, rotating speed is 3600r/min, when intake valve standard-sized sheet natural aspiration, show that when former rotary piston machine oil sprayer is arranged, maximum combustion pressure is 6Mpa, improving after-combustion pressure is 6.39Mpa, and its maximum combustion pressure has improved 6.5%, meets expection.

subordinate list:

Claims

1. a gasoline rotary engine, comprise oil sprayer, it is characterized in that: oil sprayer is arranged in to cylinder body one side that gasoline rotary engine has intake duct, and the displacement of its positional distance cylinder body minor axis axis is L, and L/ (R+e) ratio is between 4/5 ~ 5/6; Described R is gasoline rotary engine generating radius, and e is gasoline rotary engine throw of eccentric.

2. a kind of gasoline rotary engine as claimed in claim 1, is characterized in that: the injection direction of described oil sprayer is perpendicular to cylinder body major axis.

3. a kind of gasoline rotary engine as claimed in claim 1, is characterized in that: the displacement of the positional distance cylinder body minor axis axis of described oil sprayer is perpendicular to cylinder body minor axis axis.