摘要:
This invention refers to a fuel composition identification system and method (2) for an automotive vehicle combustion engine. The system comprises at least a fuel heating resistor (3) arranged in any position in the fuel tank or along the fuel line, in direct contact and exchanging heat with the fuel (2), an electronic control unit (4) connected to the resistor (3), which applies constant power values during time intervals (tn) to the resistor (3), and the metering device (6) for a heating resistor parameter (3) between the current sent to the resistor (3) and the surface temperature of the resistor that sends the measured values to the electronic control unit (4), and monitors the current values measured in the heating resistor (3) during each time interval tn, and when the electronic control unit (4) detects a variation in the value of the heating resistor current in the course of the time interval (tn), it identifies the fuel composition corresponding to the critical heat flow resulting from the power applied to the resistor during that time interval. The method comprises the steps of applying constant power values during time intervals (tn) to the fuel heating resistor (3); heating fuel in contact with the heating resistor (3) through exchanging heat between the heating resistor and the fuel (2); measuring a heating resistor parameter (3) between the current sent to the resistor (3) and the surface temperature of the resistor; monitoring the heating resistor parameter values (3) measured in the course of each time interval (tn), and when a variation in the resistor parameter value is detected in the course of the time interval (tn); identifying the fuel composition corresponding to the critical heat flow resulting from the power applied to the resistor during that time interval.
摘要:
This invention refers to a fuel composition identification system and method (2) for an automotive vehicle combustion engine. The system comprises at least a fuel heating resistor (3) arranged in any position in the fuel tank or along the fuel line, in direct contact and exchanging heat with the fuel (2), an electronic control unit (4) connected to the resistor (3), which applies constant power values during time intervals (tn) to the resistor (3), and the metering device (6) for a heating resistor parameter (3) between the current sent to the resistor (3) and the surface temperature of the resistor that sends the measured values to the electronic control unit (4), and monitors the current values measured in the heating resistor (3) during each time interval tn, and when the electronic control unit (4) detects a variation in the value of the heating resistor current in the course of the time interval (tn), it identifies the fuel composition corresponding to the critical heat flow resulting from the power applied to the resistor during that time interval. The method comprises the steps of applying constant power values during time intervals (tn) to the fuel heating resistor (3); heating fuel in contact with the heating resistor (3) through exchanging heat between the heating resistor and the fuel (2); measuring a heating resistor parameter (3) between the current sent to the resistor (3) and the surface temperature of the resistor; monitoring the heating resistor parameter values (3) measured in the course of each time interval (tn), and when a variation in the resistor parameter value is detected in the course of the time interval (tn); identifying the fuel composition corresponding to the critical heat flow resulting from the power applied to the resistor during that time interval.
摘要:
The present invention refers to a fuel rail made of plastic material with a heating system (10,100). The said rail is applied, mainly, in the form of devices for aiding the cold start of engines which consume fuels whose specific vaporization heat is high, for example, alcohol. The fuel rail made of plastic material with a heating system presents reduced cost and weight and the same functional characteristics if compared to the fuel rails known by the state of the art, which are usually made of metal. Furthermore, the said fuel rail made of plastic material with a heating system presents internal compartments configured in such a manner that the slider sliders containing slide pins (51, 52, 53) of the injection mold can be easily removed, since there is no formation of negative faces.
摘要:
The present invention refers to a fuel rail made of plastic material with a heating system (10,100). The said rail is applied, mainly, in the form of devices for aiding the cold start of engines which consume fuels whose specific vaporization heat is high, for example, alcohol. The fuel rail made of plastic material with a heating system presents reduced cost and weight and the same functional characteristics if compared to the fuel rails known by the state of the art, which are usually made of metal. Furthermore, the said fuel rail made of plastic material with a heating system presents internal compartments configured in such a manner that the sliders containing slide pins (51, 52, 53) of the injection mold can be easily removed, since there is no formation of negative faces.
摘要:
The present invention relates to a fuel identification system and method normally applied to internal combustion engine vehicles of the flex-fuel type by means of which it is possible to identify the composition of the fuel used at each point in time, particularly the ratio used in a gasoline/ethanol blend or detect the presence of air or fuel in the vapor state in the fuel line, using the same device that heats the fuel. The system according to the invention comprises a heating resistor (3) having a variable resistance value as a function of its temperature, said resistor being arranged in contact with the fuel (2); a current measuring device (6), which measures the current through the variable resistor (3); and an electronic control unit (4) connected to the resistor (3) and connected to the current measuring device (6), receiving from it the measured resistor (3) current values, the electronic control unit (4) comprising data processing means to help identify fuel (2) properties based on the current in resistor (3).
摘要:
The present invention relates to a fuel identification system and method normally applied to internal combustion engine vehicles of the flex-fuel type by means of which it is possible to identify the composition of the fuel used at each point in time, particularly the ratio used in a gasoline/ethanol blend or detect the presence of air or fuel in the vapor state in the fuel line, using the same device that heats the fuel. The system according to the invention comprises a heating resistor (3) having a variable resistance value as a function of its temperature, said resistor being arranged in contact with the fuel (2); a current measuring device (6), which measures the current through the variable resistor (3); and an electronic control unit (4) connected to the resistor (3) and connected to the current measuring device (6), receiving from it the measured resistor (3) current values, the electronic control unit (4) comprising data processing means to help identify fuel (2) properties based on the current in resistor (3).