DE2354990A1 - Gas change over control system for I.C. engines - change over space fitted outside the combustion chamber is sealed off against inlet and outlet channels - Google Patents

Abstract

Control system for the change over of gases in reciprocating I.C. engines, operating the four stroke sytem, where the combustion chambers are sealed off by valves, such as in Otto or Diesel engines. A special change-over space is made outside the combustion chamber into which lead inlet and outlet channels and a connecting channel between changeover and combustion chambers. This change-over chamber is sealded oof by special flaps towards inlet and outlet channels and intermittently by one or more valves between connecting channel and the combustion chamber.

Description

- Description - (1)

Applicant: Herbert Moser

Title: Control system for the gas exchange at Reciprocating internal combustion engines «,

Field of application: The invention relates to a control system for the gas supply in reciprocating _; . Internal combustion engines that work in the four-stroke process and in which the combustion chambers are sealed by valves, especially in Otto or diesel engines _e

Purpose: Combustion air is used in such machines Mixed fuel »By burning the fuel-air mixture energy is converted into work with the help of reciprocating pistons and crankshafts.

Prior art: It is known that such motors per cylinder unit with at least two channels are provided that open into the combustion chamber «During the compression and during the Working stroke, these channels are closed gas-tight by valves, with inlet valves always the Inlet channels, exhaust valves always the outlet channels assigned. '.'... ""

Criticism of the Prior Art: The Performance of These Motors depends on torque and speed. The torque depends on the degree of filling, this is one Function of the valve sizes and their opening times. In addition to the load, the speed of the motor results from the degree of filling, with increasing Speeds, the time periods for the gas change are reduced per work cycle. As a consequence, that the degree of filling and torque decrease in such a way that the power drops above the optimal speed. ■ - "'An improvement in performance could thus be achieved through Enlargement of the valve surfaces can be achieved. However, these are limited by the fact that 1. the valves in the surface of the 'combustion' space, the size of which is due to the construction, must be accommodated, and that

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2. Always only one salvation of the entire available The standing valve surface is used to let in the fresh gases, the remainder is used to let out of the exhaust gases.

Task ι The invention is based on the object, which significantly enlarge for taking in the fresh gases and standing for discharging the exhaust gases available valve surface.

Solution: According to the invention, this object is achieved in that a special pre- or deflection space is established, in the 1. the inlet duct, 2. the outlet duct as well as $. a connecting channel open out between the deflection chamber and the combustion chamber. This turning room becomes an inlet duct through special shut-off devices, 2. to the outlet channel and 3 · through one or more valves between the connecting channel and Separated combustion chamber. The special shut-off devices have the task of during the inlet process to keep the inlet channel open and the outlet channel closed during the exhaust process the outlet channel open and the inlet channel closed to keep. Have the valves or the valve between the deflection chamber and the combustion chamber the task of closing the combustion chamber during the compression and working process while the inlet and outlet process to keep open, so that during the gas exchange, the entire combustion chamber available valve area on the intake stroke at the inlet, on the exhaust stroke at the outlet Gases is used.

Another embodiment of the invention: TJm the deflection space to seal such a control system against the inlet or the outlet channel, are either Diaphragms, flap valves or rotary slide valves are attached, which change automatically due to fluctuations in gas pressure act or which are positively controlled. This seal can also be achieved by combinations of these Shut-off devices, e.g. inlet membrane and outlet

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rotary valve; causes advertise. Likewise, reciprocating flat slide valves can be used for this sealing purpose. To seal the combustion chamber against the "deflection chamber", one or more valves of the type customary in gasoline and diesel engines are used. This means that, depending on the configuration of the selected configuration, each of the channels may have to be divided into several channels.
Achievable Advantages: The advantages that can be achieved with the invention are in particular that. 1. through the considerable increase in the total valve area that can be used for letting in and letting out the gases, a considerable increase in performance is achieved,

2. with automatic, due to the fluctuations in the Gas pressure-induced control of the inlet and outlet channels an optimization of the control times takes place, this causes an improvement of the torque curve,

3. The combustion chamber valves relate to the previous ones Exhaust valves stay cooler because they are cooled by the entire fresh gas flow,

4. the efficiency of such machines the well-known four-stroke process in so far as this increases due to the larger usable valve area Discharge of the exhaust gases towards the end of the working stroke can be initiated later,

5. Better cooling of the exhaust gases due to faster, relaxation can take place. · ■

Description of exemplary embodiments:

Fig.Ί shows a control system in which the Diverting space against the combustion space through 4 Valves against the inlet and outlet channels each 2 positively controlled rotary flaps is limited. Fig. 2 shows a control system in which the Diverting space through 1 central valve, against the inlet and outlet channels

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Ή - by automatically dj-u-rch the fluctuations of the

Gas pressure acting Mömbran valves limited will.

Fig. 3 shows a control system in which the deflection space against the combustion chamber through 1 central valve, through against the inlet and outlet channels one rotary valve each is limited.

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Claims (1)

Applicant.: Herbert Böser ^: Patent claims: Generic term: 1.) Control system for the gas exchange. Reciprocating - internal combustion engines _s in the 4 - pull method to work, and in which the combustion chambers are sealed by valves ^ especially in gasoline and diesel engines, characterized gekennzeichnet.9dass, outside, of the combustion chamber is a special pre- or deflection produced in the 1ν the Inlet duct, 2. the outlet duct and 3 »a connecting duct open out between the deflection chamber and the combustion chamber. This deflection space is intermittently sealed by special shut-off devices 1 o to the inlet duct, 2 _e to the outlet duct and 3 * by one or more valves between the connecting duct and the combustion chamber » Preamble of the dependent claim: 2 «) Sealing of the deflection space according to claim 1 by special shut-off devices and one or more valves, characterized in that the inlet and outlet channels are either similar or (each individually intermittent are sealed by membrane valves or flap valves or back and forth slide or rotary valves, which either act automatically due to fluctuations in gas pressure or are positively controlled and that each channel is divided into several channels can be divided. . SO 9820 / GO Blank page