DE2354798A1 - I.c. engine cylinder head expansion gap - expansion gap has protective arched cover to stop carbon ingress - Google Patents

Abstract

The cylinder head face is provided with a thermal expansion gap in the area where it makes contact with the cylinder liner collar. In order to prevent carbon from entering the gap and impairing the gap's efficiency, a protective cover is provided which is arched so that the gas forces on one side will acts as a pressure force and any expansion movement of the gap will cause simply an alternation to the arch radius. The expansion gap could extend as far as the cylinder head cooling chamber since the cover would act as a seal.

Description

Klöckner-Humboldt-DeutzAG ΔΒ% ΜΡ. g _{Cologne 80> dfin} 15, October 1973

Our reference: D 73/88 - APTB.N / Bu

Cylinder head
for reciprocating internal combustion engines

The invention relates to a cylinder head for Reciprocating internal combustion engines in the cylinder head base near the contact surface on the cylinder liner or the crankcase is provided with a circumferential expansion joint.

It is known (DT-PS 370 900), the expansion joint so im.Zylinderkopfboden to arrange that it is open in the direction of the combustion chamber and forms an annular gap. The expansion joint should allow the expansion of the cylinder head base due to its heating, since a free expansion of the cylinder head overall not because of the tension between the cylinder head and the cylinder liner or crankcase is possible. However, since the expansion joint is open in the direction of the combustion chamber, there is a risk of the expansion joint with remnants of the combustion chamber, which are brought into the expansion joint under high pressure, so that after a certain Operating time the possibility of expansion of the cylinder head base is restricted and the effect of the expansion joint is canceled. Furthermore, it has a larger expansion joint

509819/0182

Klöckner-Humboldt-Deutz AG Δλ. 1 ^ .IPe U _ d __ 15101973

D 73/88

• 4.

the risk of clogging is reduced, the disadvantage that it forms a harmful space.

It is therefore the object of the present invention to avoid these disadvantages and to design the expansion joint to be improved in such a way that the cylinder head base can be fully expanded even after a long period of operation preserved.

The object of the invention is achieved in that the expansion joint at the end facing the combustion chamber through a cover plate which is arched in cross section and is curved in the direction of the combustion chamber is closed. This Cover plate now prevents the penetration of combustion chamber residues, so that even after a long period of operation the cylinder head base can expand freely ". The cover plate Depending on the material of the cylinder head and the manufacturing process, it can be used afterwards or during Casting of the cylinder head must also be poured in. A special fastening of the cover plate is not required to be provided, since the same is only pressure loaded. The possibility of expansion of the cylinder head is made possible by the "cover plate is not obstructed because the arcuate one

509819/0182

Klöckner-Humboldt-Deutz AG Ao. S ^ LBl E ^ __ * _ 15 IQ 1973

D 73/88

Education allows expansion joint movement. Furthermore, depending on the design of the cover plate, there is the possibility that the expansion joint is guided so far into the cylinder head that the opposite end is open to the cooling medium. ' -.

To further explain the invention, reference is made to the drawing in which two exemplary embodiments are shown in simplified form. It show: ■

Fig. 1 a partial section through a cylinder head and the adjoining cylinder liner with an expansion joint covered according to the invention,

Fig. 2 shows a smaller section compared to Fig. 1, in which the expansion joint extends into the coolant roughness is extended.

In the figures, 1 denotes a cylinder head ', in which coolant spaces 2 are arranged * Depending on the configuration of the cylinder head, these coolant spaces can provided for receiving coolant, or at Air cooling can be designed as cooling channels. As shown in Fig.

509819/0182

Kldckner-Humboldt-Deutz AG A ^ 1 ^ L ■■ I ^ _ 0 _ -J5 _# IQ _φ 1973

D 73/88

-If.

As can be seen, the cylinder head also has valves 3 which control the gas exchange ducts of the internal combustion engine accomplish. The cylinder head 1 is followed by a liner 4, which is not shown by Screws over a sealing ring 5 to the cylinder head is tense. The cylinder head 1 has an annular expansion joint 6 within the sealing ring 5, which is shown in FIG Direction of the liner is closed by a cover plate 7. The cover plate is curved, so that on the one hand the gas forces in the cover plate act as compressive forces and on the other hand a movement in the expansion joint only makes a change in the radius of curvature of the cover plate necessary. Because of this design of the cover plate, as can be seen in Fig. 2, the expansion joint 6 can extend into the coolant space of the cylinder head be extended, ~ because the cover plate 7 closes the expansion joint tightly.

5098 19/0182

Claims (1)

A'ftrHJWft Klöckner-Humboldt-Deutz AG AfWIl ^ _ ..... "_ ■ _Λ _ _Λ , -. _ΛΛ - 5 Κ6,1: ι 80, October 15, 1973 Our mark D 73/88 - APTB N / Bu .- 'Patent a ns ρ r υ c h Cylinder head for reciprocating internal combustion engines, which is located in the cylinder head base near the contact surface the cylinder liner or the crankcase with a circumferential Expansion joint is provided, characterized in that the expansion joint (6) is on the one facing the combustion chamber End through an arched cross-section, The cover plate (7) curved in the direction of the combustion chamber is closed. 509 819/0182 .ς. Blank page