CN202012407U

CN202012407U - Cylinder cover for diesel engine

Info

Publication number: CN202012407U
Application number: CN2011200710801U
Authority: CN
Inventors: 李壮; 张雷; 朱杰; 张振平
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2011-03-14
Filing date: 2011-03-14
Publication date: 2011-10-19
Anticipated expiration: 2021-03-14

Abstract

The utility model discloses a cylinder cover for diesel engine, comprising a cylinder cover body with a water cavity, wherein watering holes communicated with the water cavity are opened in the cylinder cover body; four watering holes are opened in every cylinder diameter range, which are watering holes (2a, 2b, 2c and 2d); a water baffle is disposed above the two watering holes (2a, 2b) at an intake side, which causes cooling water to enter into the water cavity to cool an exhaust channel and a corresponding nose bridge area at first. A flow guide plate is disposed between the water baffle and the bottom plate of the cylinder cover, which is disposed towards the fuel injector hole of the cylinder cover. The outlet root of an intake channel is casted and without a nose bridge area gap. The cylinder cover water cavity of the utility model is simplified in structure and capable of efficiently organizing water flow direction, decreasing manufacturing difficulty and reducing cost.

Description

A kind of cylinder cover for diesel engine

Technical field

The utility model relates to a kind of cylinder cover for diesel engine, particularly a kind of water cavity structure of cylinder cover for diesel engine.

Background technique

Engine cylinder cover operating conditions harshness, be in the condition of high temperature under most operating modes, so the cooling of the inner significant points of cylinder cap is very important, often need complicated inner chamber design, effectively tissue is mobile to make cooling water, by significance level the position that needs in the cylinder cap to cool off is successively cooled off, if but the water cavity structure is too complicated, then increase manufacture difficulty, increase cost, and too simply can't satisfy the cooling requirement, a kind ofly have the engine cylinder cap of simplifying and can effectively cooling off the water cavity of significant points in the cylinder cap and have great importance so design.

The model utility content

The utility model is in order to overcome defective in the above-mentioned prior art, a kind of cylinder cover for diesel engine to be provided, the water cavity designs simplification in this cylinder head, and effectively the tissue water flow path direction reduces manufacture difficulty, reduces cost.

Cylinder cover for diesel engine of the present utility model, comprise the cylinder head body that is provided with water cavity, offer the last water hole that is communicated with described water cavity on the cylinder head body, the quantity of last water hole in each cylinder diameter scope is four, be respectively

water hole

2a, 2b, 2c, 2d, wherein go up

water hole

2a, 2b top and be provided with manger board for two of air inlet one side, manger board makes cooling water enter behind the water cavity coolant exhaust road and corresponding nasal bridge region at first.

Preferably, be provided with guide plate between manger board and the cylinder head base plate, guide plate is provided with towards the cylinder cap fuel injector hole.

Preferably, guide plate thickness is 5mm.

Preferably, the width of manger board is 36.4mm, and thickness is 5mm.

Preferably, the distance of manger board one side margin and cylinder head body air inlet side working surface is 23mm; Manger board opposite side and air outlet flue wall keep the gap more than or equal to 8mm; Manger board is adopting arc transition with the intake duct junction point.

Preferably, the cooling water that enters

water hole

2b, 2d cools off the inlet and outlet road by the guide functions of inlet and outlet road wall.

Preferably, intake duct outlet root place is cast in together and does not stay the interval crack of the bridge of the nose.

Compared with prior art, the utlity model has following beneficial effect:

1, the utility model does not adopt the form of central diaphragm, but only cast out narrower together manger board, and between manger board and cylinder head base plate, cast out guide plate (standing between water hole 2a, the 2b), and current are play the guiding role, can make cooling water flow to the position that needs most cooling earlier;

2, two intake duct outlet root places are cast in together, the gap of not staying current to pass through, can optimize water (flow) direction effectively, simplified cylinder cap water cavity internal structure greatly, be beneficial to casting, reduce blank and produce the waste product probability, reduce cost, improve the economical of cylinder cap manufacturing, do not influenced the reliability of cylinder cap simultaneously.

Description of drawings

Fig. 1 is the plan view of the utility model cylinder cover for diesel engine;

Fig. 2 is that the A of Fig. 1 is to side view;

Fig. 3 is that the F-F of Fig. 1 is to sectional view;

Fig. 4 is that the D-D of Fig. 1 is to sectional view;

Fig. 5 is the partial schematic diagram of Fig. 3;

Fig. 6 is the partial schematic diagram of Fig. 4;

Fig. 7 is that the A-A of Fig. 2 is to sectional view;

Fig. 8 is that the C-C of Fig. 2 is to sectional view;

Fig. 9 is that the G-G of Fig. 3 is to sectional view.

Mark the following drawings mark thereon in conjunction with the accompanying drawings:

1-cylinder head body, 2a, 2b, the last water hole of 2c, 2d-, the 3-manger board, 4-intake duct wall, 5-air outlet flue wall, the 6-guide plate, the 7-oil injector hole, casting section between two outlets of 8-intake duct (not establishing the interval crack of the bridge of the nose), the interval crack of the bridge of the nose between 9-air outlet flue two outlet (being used for current) L1-manger board width (36.4mm) by cooling, the gap (greater than 8mm) of L2-manger board and air outlet flue wall, the R-manger board with near intake duct engages transition arc radius (25.6mm), L3-guide plate thickness (5mm), L4-manger board thickness (5mm).

Embodiment

Below in conjunction with accompanying drawing, an embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subjected to the restriction of embodiment.

As shown in Figure 1, be the plan view of the utility model Four-valve diesel engine cylinder head of; Fig. 2 is that the A of Fig. 1 is to view.Shown in Fig. 3-6, cylinder head body 1 is provided with water hole 2 and (comprises water hole 2a, last water hole 2b, last water hole 2c, last water hole 2d), intake duct wall 4, air outlet flue wall 5, last water hole 2 is provided with manger board 3 (as Fig. 3 above the air inlet side, shown in 4), be provided with guide plate 6 between the bottom of cylinder head body 1 and the manger board 3, manger board 3 links to each other with two intake duct walls, manger board thickness is 5mm (this thickness is L4 among Fig. 9), width L1 is 36.4mm, manger board 3 keeps greater than 8mm gap (being that L2 is greater than 8mm) with air outlet flue wall 5, and be the R25.6 arc transition near intake duct engages.

Guide plate 6 is cast in cylinder head body 1 base plate and manger board 3, roughly being oriented of guide plate 6 towards oil injector hole 7 centers, and guide plate 6 thickness L3 are 5mm (as shown in Figure 4).

As shown in Figure 7, two outlets of intake duct wall 4 are cast together, and (this intake duct regional temperature is lower, therefore need not to reserve the gap of passing through for cooling water promptly not stay the interval crack of the bridge of the nose, this design can effectively increase the suction port area), see also the casting section 8 between intake duct two outlets among the figure.

As shown in Figure 8, the interval crack of the bridge of the nose is set between two outlets of air outlet flue wall 5, and (this air outlet flue regional temperature is higher, it is the position that to cool off, cooling water can enter this zone at first and cool off by the interval crack of this bridge of the nose), see also the interval crack 9 of the bridge of the nose between air outlet flue two outlets among the figure.

During work, when cooling water when the last water hole 2a of cylinder head body 1 base plate enters the cylinder cap water cavity, respectively because air outlet flue-air outlet flue that the guide functions of manger board 3 and guide plate 6 at first flows to cooling water needs most cooling and the nasal bridge region between intake duct-air outlet flue, enter the cooling water of cylinder cap from

last water hole

2b, 2d, under the guide functions of intake and exhaust port wall, directly intake and exhaust port is cooled off, and flow to nasal bridge region and cylinder head plate is cooled off, go up the cooling water that the water hole enters cylinder cap from 2c and then flow to water outlet along water (flow) direction.Simultaneously because inlet temperature is lower, as previously mentioned, this design does not leave the slit at two outlets of intake duct root, therefore leave bigger space for increasing the suction port area, and better organize cooling water flow, when having satisfied cooling water the cooling of cylinder cap inside is required to the position that needs most cooling, simplified the structure of water cavity inside, reduce manufacture difficulty, reduce cost, and effectively improved the reliability and the durability of cylinder cap.

More than disclosed only be a specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection domain of the present utility model.

Claims

1. cylinder cover for diesel engine, comprise the cylinder head body that is provided with water cavity, offer the last water hole that is communicated with described water cavity on the cylinder head body, it is characterized in that, the quantity of last water hole in each cylinder diameter scope is four, be respectively water hole (2a, 2b, 2c, 2d), wherein go up top, water holes (2a, 2b) and be provided with manger board for two of air inlet one side, manger board makes cooling water enter behind the water cavity coolant exhaust road and corresponding nasal bridge region at first.

2. cylinder cover for diesel engine according to claim 1 is characterized in that, is provided with guide plate between described manger board and the cylinder head base plate, and guide plate is provided with towards the cylinder cap fuel injector hole.

3. cylinder cover for diesel engine according to claim 2 is characterized in that, described guide plate thickness is 5mm.

4. according to any described cylinder cover for diesel engine in the claim 1 to 3, it is characterized in that the width of described manger board is 36.4mm, thickness is 5mm.

5. cylinder cover for diesel engine according to claim 4 is characterized in that, the distance of described manger board one side margin and cylinder head body air inlet side working surface is 23mm; Manger board opposite side and air outlet flue wall keep the gap more than or equal to 8mm; Manger board is adopting arc transition with the intake duct junction point.

6. cylinder cover for diesel engine according to claim 1 is characterized in that, the cooling water that enters water hole (2b, 2d) cools off the inlet and outlet road by the guide functions of inlet and outlet road wall.

7. cylinder cover for diesel engine according to claim 6 is characterized in that, described intake duct outlet root place is cast in together and does not stay the interval crack of the bridge of the nose.