摘要:
A motor driven implement having an internal combustion engine having at least one cylinder and at least one carburettor, which is disposed in a carburettor chamber, which is separated by an intermediate wall from an engine compartment, wherein a fan wheel is further provided by which means air from the engine compartment can be introduced through an engine compartment opening in the intermediate wall into the carburettor chamber. A warm air opening is provided in the intermediate wall, through which the air heated over the cylinder can be introduced into the carburettor chamber and wherein an adjusting element is provided which can be brought into a summer position in which the engine compartment opening is open and the warm air opening is closed and which can be brought into a winter position in which the engine compartment opening is closed and the warm air opening is open.
摘要:
In an internal combustion engine (2) of a portable handheld work apparatus, the cylinder (3) is provided with cooling ribs (4, 4′). A cooling airflow is generated by the fan wheel (13) and is guided over the cooling ribs. A carburetor (9) is temperaturized as required by the heated cooling air. A control of the cooling airflow to the carburetor (9) takes place in that an opening (11), which passes the heated cooling air, is selectively closed or opened via a closure element (12). In order to obtain improved cooling of the cylinder during summer operation as well as during winter operation, the closure element (12) is provided with at least one air guide wall which extends essentially transversely to the cooling airflow and causes this cooling air to be partially backed up and deflected.
摘要:
The present invention provides fuel saving systems. Fuel consumption can be reduced by 5% to 40% or more by pre-combustion heating the fuels. The heat exhaust of a combustion chamber can be used to heat a heat transfer fluid, which exchanges heat with the incoming fuel stream.
摘要:
A system and method for controlling a temperature of a combustion chamber heater of an engine includes a calculation module that determines a temperature of the combustion chamber heater based on an effective resistance of the combustion chamber heater, and a control module that controls the temperature of the combustion chamber heater by commanding a duty cycle of the combustion chamber heater based on an operating temperature signal of the combustion chamber heater and a desired temperature of the combustion chamber heater.
摘要:
A cooling apparatus including an elongated body portion having a fluid inlet, a fluid outlet and a fluid channel extending between the fluid inlet and the fluid outlet, wherein the fluid channel includes a generally “G,” “C” or “( )” shaped cross-section.
摘要:
A manually guided implement having an internal combustion engine and a carburetor for supplying a fuel/air mixture to the engine is provided. Disposed between the internal combustion engine and the carburetor is a housing wall in which is arranged a preheating window for guiding to the carburetor a preheating air stream that is heated-up by the internal combustion engine. A pivotably mounted switching element is provided for closing and opening the preheating window.
摘要:
A cylinder head of an internal-combustion enbgine with at least one inlet valve and a fuel injection in an air-intake channel has an evaporation element intended for improving the fuel/air mixture formation projecting into the air-intake channel. The evaporation element has high thermal conductivity in a partition wall between the inlet-valve channels in multi-valve engines and makes direct thermal contact between the air-intake channel and the main combustion space. The heating of the mixture mass located in the air-intake channel is thus self-regulated by the combustion heat in the main combustion space. The installation avoids the hitherto necessary resistance heating constituting a drain on the power supply and improves the heating regulation of the mixture mass.
摘要:
A fuel metering system for an internal combustion engine meters out fuel in dependence on the pressure in a fuel supply container. This pressure is controlled by a valve or valves which provide communication with different regions of the induction tube of the engine. The control valves are electro-magnetic valves under the control of a suitably processed and amplified signal from an exhaust gas measuring probe which determines the concentration of oxygen.