CN207660656U

CN207660656U - A kind of admission cam of supercharged direct-injection engine

Info

Publication number: CN207660656U
Application number: CN201721671856.7U
Authority: CN
Inventors: 李晓君; 刘基升
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2017-12-05
Filing date: 2017-12-05
Publication date: 2018-07-27
Anticipated expiration: 2027-12-05

Abstract

The utility model discloses a kind of admission cams of supercharged direct-injection engine, including basic circle and cam peach, it is characterized in that, one end of the molded line of the cam peach is the unlatching terminal A of valve opening side active section, the other end is the closing terminal B of valve-closing side active section, and the tie point of valve opening side active section and valve close side active section is cam maximum lift point C；Using cam maximum lift point C as starting point, open side lift table is formed towards the correspondence of the angle and cam lift of opening terminal A direction, using cam maximum lift point C as starting point, close side lift table is formed towards the correspondence of the angle and cam lift of closing terminal B direction；The radius of the basic circle is 15.5mm, and the admission cam corresponding phase in maximum valve lift is 486 DEG C of A.The utility model has many advantages, such as that the volumetric efficiency of engine, raising engine performance can be improved.

Description

A kind of admission cam of supercharged direct-injection engine

Technical field

The utility model is related to technical field of automobile engine, convex in particular to a kind of air inlet of supercharged direct-injection engine Wheel.

Background technology

Valve actuating mechanism is the core of engine, and Valve-train Cam design is the important of valve train optimization design One of approach, reasonable design whether, are directly related to the dynamic property, economy and reliability of internal combustion engine.Good cam profile Design can make full use of air inlet inertia and improve volumetric efficiency, so as to improve the performance of engine.Undesirable design of cam contour line Engine volumetric efficiency can be caused low, power torque is low, the insufficient lubrication between cam and tappet, causes parts depreciation abnormal, sternly Severe one also results in air valve drop knock-on and valve actuating mechanism occurs flying off phenomenon.

DVVT full name are：Dual Variable Valve Timing. are intake and exhaust valve variable timing technologies.Using The engine of DVVT technologies is than, energy-saving and environmental protection more efficient compared with the engine of the inlet valve timing technology mostly used currently on the market. It is existing it is a kind of money supercharged direct-injection engine is changed using DVVT technologies, due to traditional exhaust cam molded line using open section and Close section symmetrical expression design so that the primary clearance of exhaust valve and piston be 2.26mm, when VVT participate in work when, exhaust valve with The gap of piston is -2.22mm, and there are collision phenomenons.

For this purpose, utility model people devises a kind of exhaust cam of unlatching section and closing section asymmetric design, it is arranged simultaneously Exhaust cam corresponding phase in maximum valve lift is 244 °C of A, shortens the length of work segment of exhaust cam, avoids The risk of piston and valve interference when VVT works.But the setting of above-mentioned exhaust cam can reduce the volumetric efficiency of engine, To reduce engine performance.

Utility model content

In view of the above shortcomings of the prior art, technical problem to be solved in the utility model is：How a kind of energy is provided The volumetric efficiency for enough improving engine, improves the admission cam of the supercharged direct-injection engine of engine performance.

In order to solve the above-mentioned technical problem, the utility model uses the following technical solution：

A kind of admission cam of supercharged direct-injection engine, including basic circle and cam peach, which is characterized in that the cam peach One end of molded line is the unlatching terminal A of valve opening side active section, and the other end is the closing terminal B of valve-closing side active section, And the tie point of valve opening side active section and valve close side active section is cam maximum lift point C；With cam maximum lift Point C is starting point, and open side lift table, the unlatching are formed towards the correspondence of the angle and cam lift of opening terminal A direction Side lift table is：

Using cam maximum lift point C as starting point, towards the correspondence shape for the angle and cam lift for closing terminal B direction At close side lift table, which is：

The radius of the basic circle is 15.5mm, and the admission cam corresponding phase in maximum valve lift is 486 ° CA。

In conclusion the utility model has many advantages, such as that the volumetric efficiency of engine can be improved, engine performance is improved.

Description of the drawings

Fig. 1 is the structural schematic diagram of exhaust cam.

Fig. 2 is the structural schematic diagram of admission cam.

Specific implementation mode

With reference to embodiment, the utility model is described in further detail.

When specific implementation：As depicted in figs. 1 and 2, a kind of cam set for the supercharged direct-injection engine changing money, including air inlet are convex Wheel and exhaust cam, as shown in Figure 1, one end of the cam peach molded line of the exhaust cam is the unlatching of valve opening side active section Endpoint a, the other end is the closing endpoint b of valve-closing side active section, and valve opening side active section and valve close side work The tie point of section is cam maximum lift point c；Using cam maximum lift point c as starting point, towards open the angle in endpoint a directions with The correspondence of cam lift forms open side lift table, which is：

Angle	Lift (mm)	Angle	Lift (mm)	Angle	Lift (mm)
						0°	4.429461	22°	3.413299	44°	0.809789
1°	4.427345	23°	3.320821	45°	0.709809
						2°	4.420969	24°	3.224651	46°	0.616871
3°	4.410333	25°	3.124849	47°	0.530953
						4°	4.395437	26°	3.021484	48°	0.452033
5°	4.376282	27°	2.914626	49°	0.380098
						6°	4.352873	28°	2.804348	50°	0.315142
7°	4.325217	29°	2.690729	51°	0.257163
						8°	4.293322	30°	2.573850	52°	0.206165
9°	4.257201	31°	2.453795	53°	0.162155
						10°	4.216866	32°	2.330653	54°	0.125147
11°	4.172336	33°	2.204516	55°	0.095153
						12°	4.123628	34°	2.075478	56°	0.072128
13°	4.070767	35°	1.943671	57°	0.055286
						14°	4.013776	36°	1.809550	58°	0.042807
15°	3.952684	37°	1.674138	59°	0.032532
						16°	3.887524	38°	1.538971	60°	0.022804
17°	3.818329	39°	1.405704	61°	0.013619
						18°	3.745138	40°	1.275771	62°	0.006706
19°	3.667993	41°	1.150366	63°	0.002213
						20°	3.586938	42°	1.030452	64°	0.000148
21°	3.502023	43°	0.916759	65°	0.000000

Using cam maximum lift point c as starting point, towards the correspondence shape for the angle and cam lift for closing the directions endpoint b At close side lift table, which is：

Angle	Lift (mm)	Angle	Lift (mm)	Angle	Lift (mm)
						0°	4.429461	24°	3.238818	48°	0.451641
1°	4.427322	25°	3.139925	49°	0.384084
						2°	4.420932	26°	3.037326	50°	0.324035
3°	4.410301	27°	2.931051	51°	0.271404
						4°	4.395438	28°	2.821129	52°	0.226095
5°	4.376355	29°	2.707589	53°	0.188004
						6°	4.353067	30°	2.590461	54°	0.157025
7°	4.325588	31°	2.469775	55°	0.132988
						8°	4.293938	32°	2.345560	56°	0.115100
9°	4.258135	33°	2.217846	57°	0.101722
						10°	4.218199	34°	2.086663	58°	0.090917
11°	4.174151	35°	1.952062	59°	0.081027
						12°	4.126016	36°	1.814493	60°	0.071225
13°	4.073815	37°	1.675259	61°	0.061422
						14°	4.017574	38°	1.536300	62°	0.051619
15°	3.957318	39°	1.399565	63°	0.041814
						16°	3.893073	40°	1.266754	64°	0.032008
17°	3.824867	41°	1.139287	65°	0.022201
						18°	3.752725	42°	1.018275	66°	0.013046
19°	3.676677	43°	0.904504	67°	0.006268
						20°	3.596749	44°	0.798414	68°	0.001951
21°	3.512970	45°	0.700120	69°	0.000085
						22°	3.425370	46°	0.609593	70°	0.000000
23°	3.333976	47°	0.526787

The base radius of the exhaust cam is 15.5mm, the exhaust cam corresponding phase in maximum valve lift For 244 °C of A.

As shown in Fig. 2, one end of the cam peach molded line of the admission cam is the unlatching endpoint of valve opening side active section A, the other end are the closing terminal B of valve-closing side active section, and valve opening side active section and valve close side active section Tie point is cam maximum lift point C；Using cam maximum lift point C as starting point, towards the angle and cam for opening terminal A direction The correspondence of lift forms open side lift table, which is：

Angle (°)	Lift (mm)	Angle (°)	Lift (mm)	Angle (°)	Lift (mm)
						0	4.539322	26	3.352218	52	0.477938
1	4.537532	27	3.261228	53	0.408597
						2	4.532185	28	3.167176	54	0.346863
3	4.523277	29	3.070110	55	0.292732
						4	4.510807	30	2.970083	56	0.246203
5	4.494775	31	2.867148	57	0.207271
						6	4.475182	32	2.761361	58	0.175712
7	4.452029	33	2.652782	59	0.150829
						8	4.425323	34	2.541470	60	0.131543
9	4.395067	35	2.427490	61	0.116539
						10	4.361270	36	2.310908	62	0.104435
11	4.323941	37	2.191792	63	0.093956
						12	4.283091	38	2.070212	64	0.084110
13	4.238731	39	1.946243	65	0.074359
						14	4.190877	40	1.819958	66	0.064608
15	4.139546	41	1.691510	67	0.054856
						16	4.084755	42	1.561517	68	0.045103
17	4.026526	43	1.431156	69	0.035349
						18	3.964880	44	1.301979	70	0.025594
19	3.899844	45	1.175789	71	0.016018
						20	3.831445	46	1.054395	72	0.008406
21	3.759710	47	0.939350	73	0.003223
						22	3.684674	48	0.831690	74	0.000476
23	3.606368	49	0.731745	75	0.000000
						24	3.524831	50	0.639491
25	3.440101	51	0.554897

The base radius of the admission cam is 15.5mm, the admission cam corresponding phase in maximum valve lift For 486 °C of A.

Using the cam peach molded line of the exhaust cam of above-mentioned asymmetric design and the cam peach molded line of admission cam, will be vented Cam corresponding phase in maximum valve lift is 244 °C of A, reduces the cornerite of exhaust cam active section, shortens exhaust The length of cam work section, the risk of piston and valve interference when avoiding VVT work.Meanwhile by admission cam in most air Corresponding phase is that 486 °C of A ensure the high speed of engine to ensure that the air inflow of high engine speeds performance when door lift Performance is unaffected.

By the matched design with inlet and exhaust system, which possesses torque per liter 165N.m/L, power per liter The performance indicator of 72Kw/L, while there is 1500rpm/min~3500rpm/min peak torque 165N.m, maximum power 72Kw/ The performance level of 4900r/min.

The above is only the preferred embodiment of the utility model only, is not limitation with the utility model, all at this All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model Protection domain within.

Claims

1. a kind of admission cam of supercharged direct-injection engine, including basic circle and cam peach, which is characterized in that the type of the cam peach One end of line is the unlatching terminal A of valve opening side active section, and the other end is the closing terminal B of valve-closing side active section, and The tie point of valve opening side active section and valve close side active section is cam maximum lift point C；With cam maximum lift point C For starting point, open side lift table, the open side liter are formed towards the correspondence of the angle and cam lift of opening terminal A direction Journey table is：

Angle (°) Lift (mm) Angle (°) Lift (mm) Angle (°) Lift (mm) 0 4.539322 24 3.541607 48 0.812514 1 4.537557 25 3.458336 49 0.706768 2 4.532244 26 3.371885 50 0.609429 3 4.523390 27 3.282273 51 0.520456 4 4.511001 28 3.189518 52 0.439778 5 4.495088 29 3.093639 53 0.367314 6 4.475661 30 2.994654 54 0.302966 7 4.452732 31 2.892581 55 0.246630 8 4.426311 32 2.787438 56 0.198190 9 4.396414 33 2.679242 57 0.157523 10 4.363054 34 2.568011 58 0.124439 11 4.326245 35 2.453762 59 0.098340 12 4.286004 36 2.336512 60 0.078157 13 4.242345 37 2.216276 61 0.062541 14 4.195287 38 2.093072 62 0.050059 15 4.144846 39 1.966922 63 0.039372 16 4.091039 40 1.837948 64 0.029411 17 4.033884 41 1.706511 65 0.019568 18 3.973399 42 1.573270 66 0.010973 19 3.909603 43 1.439229 67 0.004852 20 3.842515 44 1.305784 68 0.001197 21 3.772152 45 1.174634 69 0.000000 22 3.698534 46 1.047603 23 3.621679 47 0.926423

Using cam maximum lift point C as starting point, is formed and closed towards the correspondence of the angle and cam lift of closing terminal B direction Side lift table is closed, which is：

The radius of the basic circle is 15.5mm, and the admission cam corresponding phase in maximum valve lift is 486 °C of A.