CN102678373B

CN102678373B - Diesel engine cylinder head

Info

Publication number: CN102678373B
Application number: CN201110064832.6A
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: 2014-05-21
Anticipated expiration: 2031-03-14
Also published as: CN102678373A

Abstract

The invention discloses a diesel engine cylinder head which comprises a cylinder head body provided with a water cavity. Upper water holes which are communicated with the water cavity are opened on the cylinder head body, the four upper water holes are opened in each cylinder diameter range and are a upper water hole (2a), a upper water hole (2b), a upper water hole (2c) and a upper water hole (2d) respectively, and a water baffle board is arranged above the upper water hole (2a) and the upper water hole (2b) on one side of an gas inlet and enables cooling water to cool an exhaust passage and a corresponding nose bridge area firstly after the cooling water enters into the water chamber. A deflector is arranged between the water baffle board and a cylinder head baseboard and arranged to face a cylinder head oil injection hole. Root portions of outlets of gas inlet passages are cast together, and a nose area gap is not reserved on the root portions. According to the diesel engine cylinder head, the structure of the water cavity is simplified, water flow directions can be effectively organized, manufacturing difficulties can be reduced, and the cost can be reduced.

Description

A kind of cylinder cover for diesel engine

Technical field

The present invention 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, under most operating modes, be in the condition of high temperature, so the inner significant points of cylinder cap is cooling very important, often need complicated inner chamber design, effectively tissue is mobile to make cooling water, cooling to needing cooling position successively to carry out in cylinder cap by significance level, if but water cavity structure is too complicated, increase manufacture difficulty, increase cost, and too simply cannot meet cooling requirement, so design a kind of have simplify and can effective cooling cylinder cap in the engine cylinder cap of water cavity of significant points have great importance.

Summary of the invention

The present invention is in order to overcome defect in above-mentioned prior art, and a kind of cylinder cover for diesel engine is provided, and the water cavity structure in this cylinder head is simplified, and effectively tissue water flow path direction reduces manufacture difficulty, reduces cost.

Cylinder cover for diesel engine of the present invention, comprise the cylinder head body that is provided with water cavity, on cylinder head body, offer the upper water hole being communicated with described water cavity, the quantity of upper water hole within the scope of each cylinder diameter is four, be respectively

water hole

2a, 2b, 2c, 2d, wherein two of air inlet one side

upper water hole

2a, 2b tops are provided with manger board, and manger board makes cooling water enter after water cavity coolant exhaust road and corresponding nasal bridge region at first.

Preferably, between manger board and cylinder head base plate, be provided with guide plate, guide plate arranges towards 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 being more than or equal to the gap of 8mm; Manger board is adopting arc transition with intake duct junction point.

Preferably, the cooling water that enters

water hole

2b, 2d carries out cooling by the guide functions of inlet and outlet road wall to inlet and outlet road.

Preferably, air intake port root place is cast in together and does not stay gap, ridge area.

Compared with prior art, the present invention has following beneficial effect:

1, the present invention does not adopt the form of central diaphragm, but only cast out narrower together manger board, and casting out guide plate (standing between

upper water hole

2a, 2b) between manger board and cylinder head base plate, current are play the guiding role, can make cooling water first flow to and need most cooling position;

2, two air intake port root places are cast in together, the gap of not staying current to pass through, can effectively optimize water (flow) direction, greatly simplify Water Cavity of Cylinder Head internal structure, be beneficial to casting, reduce blank and produce waste product probability, reduce costs, improve the economical of cylinder cap manufacture, do not affected the reliability of cylinder cap simultaneously.

Accompanying drawing explanation

Fig. 1 is the plan view of cylinder cover for diesel engine of the present invention;

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 by reference to the accompanying drawings:

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

Embodiment

Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.

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

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

As shown in Figure 7, two outlet castings of intake duct wall 4 together, (this intake duct regional temperature is lower not stay gap, ridge area, therefore without the gap that reserves Cooling Water and pass through, this design can effectively increase suction port area), refer to the casting section 8 between intake duct two outlets in figure.

As shown in Figure 8, (this air outlet flue regional temperature is higher between two outlets of air outlet flue wall 5, gap, ridge area to be set, to need cooling position most, cooling water can enter at first this region and be undertaken cooling by this gap, ridge area), refer to the gap, ridge area 9 between air outlet flue two outlets in figure.

When work, when cooling water is when from cylinder head body 1 base plate, water hole 2a enters Water Cavity of Cylinder Head, need most the nasal bridge region between cooling air outlet flue-air outlet flue and intake duct-air outlet flue because first the guide functions of manger board 3 and guide plate 6 flows to cooling water respectively, enter the cooling water of cylinder cap from

upper water hole

2b, 2d, under the guide functions of intake and exhaust port wall, directly carry out cooling to intake and exhaust port, and flow to nasal bridge region and cylinder head plate is carried out cooling, the cooling water that water hole enters cylinder cap from 2c flows to water outlet along water (flow) direction.Simultaneously because inlet temperature is lower, as previously mentioned, this design does not leave gap at two outlet roots of intake duct, therefore leave larger space for increasing suction port area, and better organize cooling water flow to needing most cooling position, met cooling water to the requirement of cylinder cap internal cooling in, simplify the structure of water cavity inside, reduce manufacture difficulty, reduce costs, and effectively improved reliability and the durability of cylinder cap.

Disclosed is above only a specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.

Claims

1. a cylinder cover for diesel engine, comprise the cylinder head body that is provided with water cavity, on cylinder head body, offer the upper water hole being communicated with described water cavity, it is characterized in that, the quantity of upper water hole within the scope of each cylinder diameter is four, wherein top, two of air inlet one side upper water holes (2a, 2b) is provided with manger board, and manger board makes cooling water enter after water cavity coolant exhaust road and corresponding nasal bridge region at first; The air intake port root place of described cylinder head body is cast in together and does not stay gap, ridge area.

2. cylinder cover for diesel engine according to claim 1, is characterized in that, between described manger board and cylinder head base plate, is provided with guide plate, and guide plate arranges towards 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 the cylinder cover for diesel engine described in any one in claims 1 to 3, it is characterized in that, the width of described manger board is 36.4mm, and 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 being more than or equal to the gap of 8mm; Manger board is adopting arc transition with 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) carries out cooling by the guide functions of inlet and outlet road wall to inlet and outlet road.