摘要:
The invention relates to an active combustion chamber of a piston engine and a method for the transferring heat in the active combustion chamber during a single engine operation cycle. The inside of the active combustion chamber (KS) comprises at least one thermal buffer (BT) which is adjacent to the contents of the combustion chamber (KZ) and is thermally separated from the components of the combustion chamber (KS). The method consists of placing in the inside of the combustion chamber (KS), at least one thermal buffer (BT) which is adjacent to the contents of the combustion chamber (KZ) and is thermally separated from the components of the combustion chamber (KS). The thermal buffer (BT) is made from a compact material, the volumetric specific thermal capacity is higher than 1.1 J/cm3K and the temperature diffusivity is higher than 0.1 cm2/s, and the thermal buffer (BT) is made optionally from a material which has the properties of zeolite and advantageously is made from zeolite. The thermal buffer (BT) also has geometric dimensions and is made from a material such that the value of the total thermal capacity of the thermal buffer (BT) is in the region of between 100 % - 650 % of the value of the thermal portion received from the contents of the combustion chamber (KZ). A thermal portion, in an amount of between 5% - 90% of the energy which is guided to the combustion chamber content (KZ) during an individual engine operation cycle, is received by the combustion chamber content (KZ) by passing through the thermal buffer (BT), then in the same engine operation cycle, preferably when the head of the piston (KT) moves in the intensive conversion area (TA), after reducing the temperature of the combustion chamber content (KZ) as a result of the thermodynamic conversion, the combustion chamber content (KZ) is heated by the heat accumulated in the thermal buffer (BT), and after the completion of the working cycle, the load in the intake cycle and in the compression cycle of the next engine operational cycle is heated by the heat present in the thermal buffer (BT), such that the thermal buffer (BT) is prepared to receive a thermal portion in the working cycle. The buffer cycle as well as the heating and cooling cycles of the thermal buffer (BT) begin from the top dead point (OT) of the piston (KT) which opens the working cycle, and ends at the top dead point (OT) of the piston which closes the compression cycle of the next engine operational cycle.
摘要:
An engine system (200) for a vehicle comprising: a powertrain component (120); a second vehicle component (130); a fixing (140) joining the powertrain component (120) to the second vehicle component (130); a thermally insulating panel (100) comprising at least one uncompressed area (104) extending over at least a portion of the powertrain component (120) to at least partially thermally insulate the powertrain component (120) and comprising at least one pre-compressed area (106) for providing a rigid mounting position to mount the vehicle component (130) to the powertrain component (120), the rigid mounting position to be located at a potential thermal bridge between the powertrain component (120) and the second vehicle component (130) such that it forms a thermal insulating layer between the powertrain component (120) and the second vehicle component (130).
摘要:
A component for exposure to a combustion chamber of a diesel engine and/or exhaust gas, such as a cylinder liner or valve face, is provided. The component Includes a thermal barrier coating applied to a body portion formed of steel. A layer of a metal bond material is first applied, fallowed by a gradient structure including a mixture of the metal bond material and a ceramic material, followed by a layer of the ceramic material. The ceramic material includes at least one of ceria, ceria stabilised zirconia, yttria stabilised zirconia, calcia stabilized zirconia, magnesia stabilised zirconia, and zirconia stabilized by another oxide. The thermal barrier coating is applied by thermal spray or HVOF. The thermal barrier coating has a porosity of 2% by vol. to 25% vol., a thickness of less than 1 mm, and a thermal conductivity of less than 1.00 W/m.K.
摘要:
Die Erfindung betrifft eine Kraftstoffhochdruckpumpe 1, insbesondere eines Common- Rail-Einspritzsystems einer Brennkraftmaschine, aufweisend einen Pumpenzylinderkopf 3, mit einem in Richtung einer Pumpenzylinderachse in dem Pumpenzylinderkopf 3 angeordneten Saugventil 6 und einem seitlich an dem Pumpenzylinderkopf 3 angeordneten Kraftstoffhochdruckauslass 5, wobei eine die Kraftstoffhochdruckpumpe 1 zumindest teilweise überdeckende Schutzkappe 10, 10a vorgesehen ist. Erfindungsgemäß wird eine Kraftstoffhochdruckpumpe 1 mit einer Schutzkappe 10, 10a bereitgestellt, bei der die Schutzkappe 10, 10a problemlos bei einer zusammengebauten Kraftstoffhochdruckpumpe 1 montierbar ist. Erreicht wird dies dadurch, dass auf das elektrisch betätigte Saugventil 6 ein Stecker 8 mit einem seitlichen Leitungsanschluss 9 aufgesetzt ist, und die Schutzkappe 10 zweiteilig ausgebildet ist und zwei miteinander verbindbare Schutzkappenteile 11a, 11b aufweist oder aber, dass auf das elektrisch betätigte Saugventil 6 ein Stecker 8 mit einem seitlichen Leitungsanschluss 9 aufgesetzt ist, und die Schutzkappe 10a ringförmig ausgebildet ist und einen den Ring unterbrechenden Freigangschlitz 19 aufweist.
摘要:
The present invention relates to a layered thermal barrier coating (1); which enables to increase the useful heat that will be utilized by reducing the heat transfer to the cooling and lubricating system via the cylinder head (H), piston (P), valve (V), exhaust/intake port (E) and cylinder wall (C) components in diesel engines (D); prevents penetration of unburned fuel to the porous surface formed due to the porous structure of the thermal barrier coating; and additionally can prevent wearing of the cylinder head (H), piston (P), valve (V), exhaust/intake port (E) and/or cylinder wall (C) components; and to a method for providing this coating (1).
摘要:
Die vorliegende Erfindung betrifft einen thermisch isolierten Verbrennungsmotor, wobei die Oberfläche eines oder mehrere Teile des Verbrennungsmotors ganz oder teilweise mit einem Polyurethanschaumstoff umgeben ist. Weiter betrifft die vorliegende Erfindung ein Verfahren zur Herstellung eines thermisch isolierten Verbrennungsmotors, wobei man ein Motorteil vorlegt, den zu umschäumenden Teil des Motorteils mit einer Form umgibt, so dass zwischen Motorteil und Form ein Hohlraum entsteht, eine Polyurethanreaktionsmischung in den Hohlraum gibt, die Polyurethanreaktionsmischung zu einem Polyurethanschaumstoff ausreagieren lässt und die Form entfernt.
摘要:
The piston machine with adiabatic expansion space has an expansion space (8) in which there occurs the adiabatic thermodynamic action, when there occurs thermal exchange between the operation medium and the surrounding environment only in negligible volume, which means an increase of the piston machine efficiency. The base of the machine is the set (1) of the cylinder, the complex piston (3) with gudgeon pin (4) for connection of the piston (3) with the piston rod (5) and crank shaft (6) in the case (11). The complex piston (3) consists of the carrier (7), the piston (9) and the guide ring (10). The set (1) of the cylinder consists of the bushing (12) and the cylinder (14). The bushing (12) and the guide ring (10) create the set for straight guide of the piston (9) in the cylinder (14) and for absorption of side pressures between them. The expansion space (8), consisting of the bottom (20) of the piston (9) and inner surface (19) of the cylinder (14), is separated from the bushing (12) and the guide ring (10) by thermal insulation (16). The movement of the guide ring (10) on the walls of the bushing (12) is supported by the lubricant which is not subject to degradation by influence of heat or chemical influence of the medium. When there is flexibly placed the cylinder (14) and the piston (9) and there is selected the suitable material, a freely aligned set is developed in the expansion space (8) where tightness is reached without piston rings and where no cooling or lubrication is needed due to absence of side pressures and impacts.