DE112017007986T5 - Device for regulating the degree of compression in a reciprocating piston engine - Google Patents

Abstract

Based on the design of the pneumatic system, the task of replacing the pressure regulator according to the prototype is solved by a safety valve that is simpler, cheaper and more reliable.

Description

The invention relates to a device for controlling the degree of compression in a reciprocating piston engine. The invention relates to mechanical engineering.

A device according to PCT / UA 2017 000045 is considered to be the closest to the registered invention. This device was chosen as a prototype. The device contains a combustion chamber which is delimited by a working piston and a control cylinder. The working piston moves within the working cylinder. The control piston moves within the control cylinder.

• - ein Regelzylinder, der in einem Brennraum eingebaut (eingelassen) ist;
• - ein Regelkolben, der innerhalb eines Regelzylinders angeordnet ist;
• - eine Stange des Regelkolbens;
• - eine Einlassöffnung des Regelzylinders;
• - eine Auslassföffnung des Arbeitszylinders;
• - ein Druckbehälter;
• - ein Rückflussventil;
• - eine Leitung;
• - eine Dichtmanschette.

The prototype and the invention share several common features. These include:

• - A control cylinder, which is installed in a combustion chamber;
• - A control piston which is arranged within a control cylinder;
• - a rod of the control piston;
• - an inlet opening of the control cylinder;
• - an outlet opening of the working cylinder;
• - a pressure vessel;
• - a check valve;
• - a line;
• - a sealing sleeve.

In the prototype, air is supplied to the control cylinder above the control piston via a line through an outlet opening of the working cylinder, a check valve, a pressure regulator, a pressure vessel and further through an inlet opening of the control cylinder. The pressure regulator is an expensive and prone to failure device.

• einen Arbeitszylinder 1 mit einem darin eingebauten Arbeitskolben 2,
• einen Regelzylinder 4 mit einem darin eingebauten Regelkolben 5,
• eine Stange 6,
• eine Auslassöffnung 3 aus dem Arbeits-Brennraum,
• ein Rückflussventil 7,
• eine Leitung 8,
• einen Druckbehälter 9,
• eine Einlassöffnung 10 des Regelzylinders 4,
• eine Dichtmanschette 11,
• ein Sicherheitsventil (Überdruckventil) 12,
• eine Lagerungsscheibe 13.

The task is to replace the pressure regulator with a cheaper and more reliable device. The device contains:

• a working cylinder 1 with a working piston built into it 2nd ,
• a control cylinder 4th with a control piston built into it 5 ,
• a pole 6 ,
• an outlet opening 3rd from the working combustion chamber,
• a backflow valve 7 ,
• a line 8th ,
• a pressure vessel 9 ,
• an inlet opening 10th of the control cylinder 4th ,
• a sealing sleeve 11 ,
• a safety valve (pressure relief valve) 12 ,
• a storage disc 13 .

• Beim Motorstart kommt die verdichtete Ladung aus dem Brennraum durch die Auslassöffnung 3, das Rückflussventil 7 in die Leitung 8 und weiter in den Druckbehälter 9 und durch die Einlassöffnung 10 in den Regelzylinder 4 über den Regelkolben 5. Das Sicherheitsventil (Überdruckventil) 12 öffnet sich bei einem Druck, der kleiner als der Detonationsdruck ist.

The device works as follows:

• When the engine starts, the compressed charge comes out of the combustion chamber through the outlet opening 3rd , the backflow valve 7 in the line 8th and further into the pressure vessel 9 and through the inlet opening 10th in the control cylinder 4th over the control piston 5 . The safety valve (pressure relief valve) 12 opens at a pressure that is less than the detonation pressure.

The working cylinder works when the engine is started for the first time 1 with the working piston 2nd and the backflow valve 3rd as a compressor.

The maximum target pressure value is determined using the safety valve (pressure relief valve) 12 given. Via the safety valve (pressure relief valve) 12 a small amount of gases will escape permanently because of the pressure increase at which the specified value on the safety valve 12 is exceeded, it will be minor that the control piston 5 moves constantly and balances the pressure from both sides.

It is known that if a safety valve is provided in a pneumatic system, this protects the respective system against destruction. In the present case, the safety valve functions as a pressure regulator that limits the pressure in the combustion chamber within the values that preclude detonation. There is an improved combustion of the fuel mixture, which contributes to saving fuel and improves the ecological indicators (the environmental performance) of the exhaust gases.

Claims (1)

Device for regulating the degree of compression in a reciprocating piston engine with - a working cylinder, a working piston and an outlet opening, - a regulating cylinder, a regulating piston and an inlet opening, - a pressure vessel, - a sealing sleeve of the rod of the working piston, - a rod with a bearing washer of the connecting line, characterized in that it consists of components which are connected to one another in a certain sequence by the line, namely through an outlet opening from the working cylinder, a check valve, a pressure vessel, a safety valve with an opening pressure lower than the detonation pressure and an inlet opening of the control cylinder.

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