GB2366327A

GB2366327A - Arrangement of engine cylinder valves and combustion chamber in i.c. engines

Info

Publication number: GB2366327A
Application number: GB0021619A
Authority: GB
Inventors: Gary John Knight
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-01
Filing date: 2000-09-01
Publication date: 2002-03-06
Also published as: GB0021619D0

Abstract

A cuboid shaped combustion chamber (2) with two or more diametrically opposed engine cylinder valves. (4) Valve head (10) to valve head (10) positioned in their optimum position in the said combustion chamber, (2) and the combustion chamber positioned in its optimum position in the cylinder head. (8) For increasing the flow of gases to and from the cylinder (12) because the engine cylinder valves (4) can be increased in size considerably.

Description

1 2366327 IMPROVEMENTS TO INTERNAL COMBUSTION ENGINES This invention

relates to internal combustion engines and in particular the combustion chamber and the engine cylinder valves.

The engine cylinde r valves positioned in the combustion chamber in the cylinder head of an internal combustion engine petrol or diesel, allows air or air and fuel mixture into the engine cylinders and burnt gases out of the engine cylinders. The engine cylinder valves are as large as they can be due to the amount of room in the combustion chamber.

The engine cylinder valves allows gases to flow to and from the engine cylinders at a certain rate, any increase in the flow of these gases would result in a higher performance engine.

It is an object of the invention to provide an improved combustion chamber and valve arrangement for an internal combustion engine petrol or diesel.

According to the present invention there is provided A cuboid shaped combustion chamber with two or more diametrically opposed engine cylinder valves. Valve head to valve head, positioned in their optimum position in the two largest areas of the combustion chamber for an internal combustion engine petrol or diesel. The said combustion chamber can be cuboid shaped or the top of the combustion chamber can be rounded to follow the shape of the valve head and to increase compression ratio.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which: - Figure 1 shows a cross-sectional view of a single cylinder internal combustion engine with two valves positioned in the cylinder head the combustion chamber is between the said two valves and a piston in the cylinder.

Figure 2 is a view similar to that of figure I but showing the engine at a different angle. The head of one valve can be seen the said valve is positioned in the cylinder head the combustion chamber is in front of the valve and the piston in the cylinder, Referring to figure I the combustion chamber (2) is between the two diametrically opposed engine cylinder valves (4) valve head (10) to valve head, (10) and is shown to be cuboid in shape and vertical above the piston. (6) The shape of the combustion chamber (2) can be changed as shown in figure 2 were the top of the combustion chamber (14) is rounded to follow the shape of the valve head (10) and to increase the compression ratio. In figure I the distant between the two valve heads (10) is the depth of the combustion chamber. (2) This can be narrowed to increase compression ratio but can't be to narrow or the valves (4) will come into contact with each other. It can also be widened to decrease compression ratio. The reason for the shape of the combustion chamber (2) and the diametrically opposed valves (4) is the valves (4) are larger than a conventional internal combustion engines valves, (not shown). Were the valves are next to each other and there is not enough room in the combustion chamber to substantially increase the size of the valves. The larger valves (4) in accordance with the invention allow more gases to flow to and from the combustion chamber (2) at a faster rate this is to increase performance. Or the amount of gas flowing to and from the combustion chamber (2) can remain as standard and the valves (4) open a less amount this will make it easier for the engine to rotate the camshaft for more fuel economy and less wear on the camshaft. The valves (4) are considerable in size as shown in figure 2 the valve head (10) is nearly as wide as the piston (6) and the cylinder. (12) It will be appreciated that the described system can be applied to any internal combustion engine having at least one piston and cylinder incorporating at least two valves per cylinder for diesel or petrol engines.

Because the valves are diametrically opposed the valve lift may have to be adjusted to avoid the valves hitting each other or not depending on the compression ratio.

Because the valves are much larger than that of a conventional internal combustion engine the gases will flow faster to and from the engine. Resulting in less drag on the piston when the said piston is drawing fuel and air mixture into the cylinder and expelling burnt gases from the cylinder.

The combustion chamber is generally cuboid in shape but can be rounded at the top to follow the shape of the valves and to increase compression ratio and the valves makeup the biggest area of the combustion chamber.

Thus in accordance with the invention, there is provided an internal combustion engine, petrol or diesel comprising a cuboid shaped combustion chamber with or without the top of the combustion chamber rounded. Two or more diametrically opposed engine cylinder valves, valve head to valve head. Positioned in the said combustion chamber, for improving engine performance or engine efficiency or both.

Claims

1. A cuboid shaped combustion chamber with two or more diametrically opposed engine cylinder valves. Valve head to valve head, positioned in their optimum position in the two largest areas of the combustion chamber for an internal combustion engine petrol or diesel. The said combustion chamber can be cuboid shaped or the top of the combustion chamber can be rounded to follow the shape of the valve head and to increase compression ratio.

2. A cuboid shaped combustion chamber with or without the top of the combustion chamber being rounded, for an internal combustion engine as claimed in claim I wherein the said engine having at least one cylinder, wherein the or each cylinder having one piston, and at least two engine cylinder valves.

3. An internal combustion engine petrol or diesel as claimed in claim I and claim 2 wherein the said engine having at least two diametrically opposed engine cylinder valves. Valve head to valve head.

4. An internal combustion engine petrol or diesel as claimed in any preceding claim wherein the said engine having a combustion chamber between two or more engine cylinder valves, and the combustion chamber being in its optimum position.

5. An internal combustion engine petrol or diesel as claimed in any preceding claim wherein the said engine having at least two engine cylinder valves and the said valves being operated by one or more camshafts. The said camshaft or camshafts opening and closing the valves within the appropriate timing constraints of the engine cycle.

6. A combustion chamber for an internal combustion engine as claimed in any preceding claim wherein the said combustion chamber is positioned at any angle in the cylinder head.

7. An internal combustion engine petrol or diesel as claimed in any preceding claim wherein the said engine having at least two engine cylinder valves and the said valves positioned in the cylinder head in their optimum position.

8. An improved combustion chamber and engine cylinder valve arrangement for an intemal combustion engine petrol or diesel substantially described herein with reference to figures I and 2 of the accompanying drawings.