CN203614239U

CN203614239U - Displacement variable engine

Info

Publication number: CN203614239U
Application number: CN201320799942.1U
Authority: CN
Inventors: 丁明峰; 解方喜; 洪伟; 苏岩; 许允; 李小平; 古春山; 杨俊伟; 刘鑫龙; 钟兵
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2013-12-08
Filing date: 2013-12-08
Publication date: 2014-05-28
Anticipated expiration: 2023-12-08

Abstract

The utility model belongs to the technical field of engines and relates to a displacement variable engine. Air inlet pipes are correspondingly arranged on a first cylinder, a second cylinder, a third cylinder and a fourth cylinder which are positioned on a direct injection engine, and connected with a throttle valve split air inlet mechanism respectively through a first cylinder air inlet pipe port, a second cylinder air inlet pipe port, a third cylinder air inlet pipe port and a fourth cylinder air inlet pipe port. The end port of an exhaust main pipe is connected with a three-effect catalytic converter, the side port of the exhaust main pipe is connected with the inlet of a waste gas return pipe I, the outlet of the waste gas return pipe I is connected with a waste gas return pipe II through a throttle valve connection part III with a throttle valve III, and the waste gas return pipe II is connected with the fourth cylinder air inlet pipe of the throttle valve split air inlet mechanism. An electric control unit is connected with three throttle valves, a third cylinder atomizer and a fourth cylinder atomizer, and the third cylinder atomizer and the fourth cylinder atomizer are fixedly connected onto a cylinder cover of the direct injection engine. After the displacement is varied, an excess air coefficient of the engine in use is ensured to be one, therefore, the three-effect catalytic converter can work normally, emission is reduced, cooling and heating alternation in the cylinders can be avoided, service life of the engine is prolonged, cost is low, and oil saving effect is good.

Description

A kind of variable-displacement engine

Technical field

The utility model belongs to technical field of engines, is specifically related to a kind of variable-displacement engine that can improve fuel-saving efficiency.

Background technique

Variable displacement technology refers to stop sub-cylinder work under the operating mode of little load, and to the many oil spouts of other cylinder, identical power while making it produce with whole cylinder operation, and still total fuel injection quantity but can reduce, and can save like this part fuel oil.From the part throttle characteristics of petrol engine, the fuel consumption rate of engine operation in the time of little load can be very high, but the fuel consumption rate in the time of middle high load can reduce, this is that throttle opening is less due to when the low-load, throttling action is larger, hour, the ventilation of cylinder is bad for throttle opening, and residual waste gas increases, burn bad, cause fuel consumption rate to increase.Along with energy crisis is more and more severeer, traffic more next with block up, vehicle grows with each passing day, it is increasing that our automobile is operated in the probability of sub load or moderate duty operating mode, this just makes to become discharge capacity technology the space of performance.Motor is in the time of road driving, load is not constant, sometimes need the work of stop sub-cylinder, sometimes need cylinder all to work, if in the time that stop sub-cylinder is worked, it is the simple oil spout that stops, and do not take other measures, this will make out-of-work cylinder still enter air, air can be taken away the heat producing when early stage, cylinder was all worked, and the temperature in cylinder is reduced, and this not only makes the extra thermal loss of generation of motor, and the process that colds and heat succeed each other, can cause decline the working life of motor.Moreover, also can cause after-treatment device transfer capability to decline, this is mainly because present petrol engine after-treatment device mostly is triple effect catalytic converter, this device is that conversion efficiency is best when excess air coefficient is 1, if idle cylinder continues into air, can cause the gas air of discharging to increase, make excess air coefficient much larger than 1, after-treatment device catalytic conversion decrease in efficiency, causes deterioration of emission.

On some high-grade automobile, be provided with and stop valve system, a kind of exactly mechanism that can stop valve motion in stopping oil spout, keeps inlet and exhaust valve in closed condition, this mechanism is not only complicated, the precision of claimed structure is very high, controls its motion aspect also cumbersome, requires accurate, rapid.On the other hand, most of family sedan-chair mostly is four cylinder engine now, and the valve system that stops that is really applied to small displacement engine does not almost have, and Ge great motor corporation does not also release such motor.Even if this mechanism is housed, this engine price is also relatively high, and the expense of saving by fuel-economizing may just in time have been offset the price of this mechanism.Therefore provide to Consumer, cost is low to necessitate with the large product of income.

Summary of the invention

The purpose of this utility model is to provide a kind of variable-displacement engine that can improve fuel-saving efficiency.

The utility model is by being provided with motor one cylinder 1, motor two cylinder 2, motor three cylinders 3, the in-cylinder direct fuel-injection engine 9 of motor four cylinders 4, triple effect catalytic converter 5, exhaust manifold 6, three cylinder injectors 7, four cylinder injectors 8, exhaust gas recirculation pipe I 11, be equipped with the closure link III 25 of closure III 12, ECU (Electrical Control Unit) 18 and closure partition type admission gear composition, wherein on in-cylinder direct fuel-injection engine 9, be followed successively by from left to right motor one cylinder 1, motor two cylinder 2, motor three cylinders 3 and motor four cylinders 4, each cylinder is to there being one section of suction tude, and respectively through a cylinder air inlet mouth of pipe 19, the two cylinder air inlet mouth of pipe 20, the three cylinder air inlet mouths of pipe 22 are connected with closure partition type admission gear with the four cylinder air inlet mouths of pipe 24, exhaust manifold 6 end outlets are connected with triple effect catalytic converter 5, exhaust manifold 6 side exits are connected with exhaust gas recirculation pipe I 11 entrances, the closure link III 25 that exhaust gas recirculation pipe I 11 exports through being equipped with closure III 12 is connected with exhaust gas recirculation pipe II 13, and exhaust gas recirculation pipe II 13 is connected with four cylinder suction tude 10 of closure partition type admission gear, ECU (Electrical Control Unit) 18 is made up of signal receiving module 28, data processing module 29, control output module 30, ECU (Electrical Control Unit) 18 is connected with closure I 16, closure II 14, closure III 12 and three cylinder injectors 7, four cylinder injectors 8 that are fixed in in-cylinder direct fuel-injection engine 9 cylinder head respectively, and ECU (Electrical Control Unit) 18 also receives respectively tach signal 31 and torque signal 32.

Described closure partition type admission gear is made up of a two cylinder suction tude 17, the closure link I 21 that is equipped with closure I 16, three cylinder suction tude 15, the closure link II 23 that is equipped with closure II 14, exhaust gas recirculation pipe II 13 and four cylinder suction tude 10, and wherein a two cylinder suction tude 17, the closure link I 21 that is equipped with closure I 16, three cylinder suction tude 15, the closure link II 23 that is equipped with closure II 14 and four cylinder suction tude 10 are connected in series; One two cylinder suction tude 17 is provided with a cylinder air inlet mouth of pipe 19, the two cylinder air inlet mouth of pipe 20 and intake manifold's entrance 27; Three cylinder suction tude 15 are provided with the three cylinder air inlet mouths of pipe 22; Four cylinder suction tude 10 are provided with the exhaust gas recirculation tube inlet 26 of the four cylinder air inlet mouths of pipe 24 and exhaust gas recirculation pipe II 13.

Compared with prior art the beneficial effects of the utility model are:

1. the utility model is becoming after discharge capacity, and can guarantee engine operation time, excess air coefficient is 1, and triple effect catalytic converter is normally worked.

2. the utility model, becoming after discharge capacity, is compared under identical operating mode with former machine, can improve discharge.

3. the utility model can maintain cylinder temperature, avoids cylinder interior to cold and heat succeed each other, and affects the working life of motor.

4. the utility model cost is low, oil-saving effect with do not change air inlet and stop merely compared with oil spout, greatly improving fuel consume.

Accompanying drawing explanation

Fig. 1 is the structural representation of variable-displacement engine

Fig. 2 is closure partition type admission gear and exhaust gas recirculation pipe I, be equipped with the schematic diagram of the closure link III of closure III, exhaust gas recirculation pipe II annexation

Fig. 3 is A--A cross sectional view in Fig. 2

Fig. 4 is the plan view of closure partition type admission gear

Fig. 5 is the rear view of closure partition type admission gear

Fig. 6 is ECU (Electrical Control Unit) and component annexation schematic diagram

Wherein: 1. the motor one cylinder 2. motor two cylinder 3. motor three cylinder 4. motor four cylinder 5. triple effect catalytic converter 6. exhaust manifold 7. 3 cylinder injector 8. 4 cylinder injector 9. in-cylinder direct fuel-injection engine 10. 4 cylinder suction tude 11. exhaust gas recirculation pipe I 12. closure III 13. exhaust gas recirculation pipe II 14. closure II 15. 3 cylinder suction tude 16. closure I 17. 1 two cylinder suction tude 18. ECU (Electrical Control Unit) 19. 1 cylinder air inlet mouth of pipe 20. two cylinder air inlet mouth of pipe 21. closure link I 22. 3 cylinder air inlet mouth of pipe 23. closure link II 24. 4 cylinder air inlet mouth of pipe 25. closure link III 26. exhaust gas recirculation tube inlet 27. intake manifold's entrance 28. signal receiving module 29. data processing modules 30. are controlled output module 31. tach signal 32. torque signals

Embodiment

Below in conjunction with accompanying drawing, the utility model is explained in detail:

Consult Fig. 1, in figure, circular portion is from left to right followed successively by motor one cylinder 1, motor two cylinder 2, motor three cylinders 3, motor four cylinders 4, an electric-controlled fuel injector is housed in each cylinder head, only list three cylinder injectors 7 and four cylinder injectors 8 that the utility model need to be used below, one two cylinder suction tude 17 is connected with three cylinder suction tude 15 through closure link I 21, and three cylinder suction tude 15 are connected with four cylinder suction tude 10 through closure link II 23.Exhaust gas recirculation pipe I 11 communicates exhaust manifold 6 and four cylinder suction tude 10, realize the function of exhaust gas recirculation, one two cylinder suction tude 17 is affixed with the cylinder body of motor one cylinder 1 and motor two cylinder 2 through a cylinder air inlet mouth of pipe 19 and the two cylinder air inlet mouth of pipe 20, three cylinder suction tude 15 are affixed with the cylinder body of motor three cylinders 3 through the three cylinder air inlet mouths of pipe 22, and four cylinder suction tude 10 are affixed with the cylinder body of motor four cylinders 4 through the four cylinder air inlet mouths of pipe 24.

Exhaust manifold 6 end outlets are connected with triple effect catalytic converter 5, exhaust manifold 6 side exits are connected with exhaust gas recirculation pipe I 11 entrances, exhaust gas recirculation pipe I 11 is connected with exhaust gas recirculation pipe II 13 through closure link III 25, and exhaust gas recirculation pipe II 13 and four cylinder suction tude 10 are as a whole.

In-cylinder direct fuel-injection engine 9 in the utility model is the common direct spray petrol engine in cylinder extensively adopting at present, and does not have the mechanism that stops valve motion.Closure link I 21, closure link II 23 and closure link III 25 are resistant to elevated temperatures structure, and closure III 12, closure II 14 and closure I 16 are resistant to elevated temperatures electronically controlled throttle valve or simple mechanism that some are feasible.Triple effect catalytic converter 5 is arranged on the 6 end outlets of exhaust gas recirculation pipe exhaust manifold, is the tail-gas after treatment apparatus of specialized application on petrol engine, can apply commercially available most of product.Chip or ECU that ECU (Electrical Control Unit) 18 is the processor that stores the work of controlling three cylinder injectors 7, four cylinder injectors 8 and whether open and close with closure III 12, closure II 14 and closure I 16, these programs data that experiment produces based on engine calibration are write.

ECU (Electrical Control Unit) and component annexation schematic diagram as shown in Figure 6, relates to the annexation of ECU (Electrical Control Unit) 18 and three cylinder injectors 7, four cylinder injectors 8, closure III 12, closure II 14, closure I 16.ECU (Electrical Control Unit) 18 is made up of signal receiving module 28, data processing module 29, control output module 30.Signal receiving module 28 receives tach signal and torque signal, data processing module 29 front and back connect respectively signal receiving module 28 and control output module 30, control output module 30 and be connected with closure I 16, closure II 14, closure III 12 and three cylinder injectors 7, four cylinder injectors 8 that are fixed in in-cylinder direct fuel-injection engine 9 cylinder head respectively, ECU (Electrical Control Unit) 18 also receives respectively tach signal 31 and torque signal 32.

Wherein, described signal receiving module 28 comprises A/D change-over circuit, by receiving tach signal 31 and the torque signal 32 of coming, analogue signal is converted to digital signal; Described data processing module 29, processes the digital signal of accepting, and then judges whether the work of stop sub-cylinder, and definite which cylinder operation that stops, meanwhile, according to the situation of cylinder operation, judge the open and-shut mode of closure III 12, closure II 14, closure I 16; The work that described control output module 30 is controlled three cylinder injectors 7, four cylinder injectors 8 according to the result of data processing module 29 whether with the open and-shut mode of closure III 12, closure II 14, closure I 16.

Specifically comprise following three kinds of control modes:

1) while load greatly, motor one cylinder 1, motor two cylinder 2, motor three cylinders 3 and motor four cylinders 4 are worked, and need to keep closure III 12 to close, and closure I 16 and closure II 14 are in opening state, can make so each cylinder obtain fresh air, maintain normal work.

2) when moderate duty, motor four cylinders 4 are not worked, motor one cylinder 1, motor two cylinder 2 and motor three cylinders 3 are worked, need to keep closure II 14 to close, closure I 16 and closure III 12 are in opening state, can make like this waste gas enter idle motor four cylinders 4, fresh air enters motor one cylinder 1, motor two cylinder 2 and motor three cylinders 3.

3) when little load, motor three cylinders 3, motor four cylinders 4 are not worked, motor one cylinder 1, motor two cylinder 2 are worked, need to keep closure I 16 to close, closure II 14, closure III 12 are in opening state, can make like this waste gas enter idle motor three cylinders 3 and motor four cylinders 4, fresh air enters motor one cylinder 1 and motor two cylinder 2.

Claims

1. a variable-displacement engine, it is characterized in that by being provided with motor one cylinder (1), motor two cylinder (2), motor three cylinders (3), the in-cylinder direct fuel-injection engine (9) of motor four cylinders (4), triple effect catalytic converter (5), exhaust manifold (6), three cylinder injectors (7), four cylinder injectors (8), exhaust gas recirculation pipe I (11), be equipped with the closure link III (25) of closure III (12), ECU (Electrical Control Unit) (18) and closure partition type admission gear composition, wherein on in-cylinder direct fuel-injection engine (9), be followed successively by from left to right motor one cylinder (1), motor two cylinder (2), motor three cylinders (3) and motor four cylinders (4), each cylinder is to there being one section of suction tude, and respectively through a cylinder air inlet mouth of pipe (19), the two cylinder air inlet mouth of pipe (20), the three cylinder air inlet mouths of pipe (22) are connected with closure partition type admission gear with the four cylinder air inlet mouths of pipe (24), the outlet of exhaust manifold (6) end is connected with triple effect catalytic converter (5), exhaust manifold (6) side exit is connected with exhaust gas recirculation pipe I (11) entrance, exhaust gas recirculation pipe I (11) outlet is connected with exhaust gas recirculation pipe II (13) through the closure link III (25) that is equipped with closure III (12), and exhaust gas recirculation pipe II (13) is connected with four cylinder suction tude (10) of closure partition type admission gear, ECU (Electrical Control Unit) (18) is made up of signal receiving module (28), data processing module (29), control output module (30), ECU (Electrical Control Unit) (18) is connected with closure I (16), closure II (14), closure III (12) and three cylinder injectors (7), four cylinder injectors (8) that are fixed in in-cylinder direct fuel-injection engine (9) cylinder head respectively, and ECU (Electrical Control Unit) (18) also receives respectively tach signal (31) and torque signal (32).

2. by variable-displacement engine claimed in claim 1, it is characterized in that described closure partition type admission gear is by a two cylinder suction tude (17), be equipped with the closure link I (21) of closure I (16), three cylinder suction tude (15), be equipped with the closure link II (23) of closure II (14), exhaust gas recirculation pipe II (13) and four cylinder suction tude (10) composition, a wherein two cylinder suction tude (17), be equipped with the closure link I (21) of closure I (16), three cylinder suction tude (15), the closure link II (23) and the four cylinder suction tude (10) that are equipped with closure II (14) are connected in series, one two cylinder suction tude (17) is provided with a cylinder air inlet mouth of pipe (19), the two cylinder air inlet mouth of pipe (20) and intake manifold's entrance (27), three cylinder suction tude (15) are provided with the three cylinder air inlet mouths of pipe (22), four cylinder suction tude (10) are provided with the exhaust gas recirculation tube inlet (26) of the four cylinder air inlet mouths of pipe (24) and exhaust gas recirculation pipe II (13).