FUEL VAPOR PRESSURE MEASURING DEVICE
First Claim
1. A fuel vapor pressure measuring device comprising:
- a fuel tank for storing fuel;
a fuel pump for supplying the fuel in the fuel tank to a fuel injection device;
a fuel vapor generating section including a nozzle, a vaporizing chamber, and a venturi, the fuel vapor generating section being configured to inject the fuel from the nozzle to pass through the venturi, thereby vaporizing the fuel in the vaporizing chamber;
a first fuel path that connects the fuel pump and the fuel injection device;
a second fuel path having one end connected to the fuel pump or the first fuel path and the other end connected to the fuel vapor generating section;
pressure detection means for detecting pressure of the fuel vapor generating section; and
vapor pressure calculation means for calculating fuel vapor pressure based on a detection result of the pressure detection means,the fuel vapor generating section being placed in the fuel tank.
1 Assignment
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Accused Products
Abstract
A fuel vapor pressure measuring device is provided, in a fuel supplying system, with a fuel tank for containing fuel, a fuel pump for supplying the fuel in the fuel tank to an injector, a fuel vapor generating section having a nozzle, a vaporizing chamber, and a venturi and vaporizing, in the vaporizing chamber, fuel by ejecting the fuel from the nozzle and causing the fuel to pass through the venturi, a first fuel path for interconnecting the fuel pump and the injector, a second fuel path having one end connected to the fuel pump and the other end connected to the fuel vapor generating section, a pressure sensor for detecting the pressure in the fuel vapor generating section, and an ECU for calculating the pressure of fuel vapor based on the result of detection by the pressure sensor. The fuel vapor generating section is mounted in the fuel tank.
21 Citations
31 Claims
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1. A fuel vapor pressure measuring device comprising:
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a fuel tank for storing fuel; a fuel pump for supplying the fuel in the fuel tank to a fuel injection device; a fuel vapor generating section including a nozzle, a vaporizing chamber, and a venturi, the fuel vapor generating section being configured to inject the fuel from the nozzle to pass through the venturi, thereby vaporizing the fuel in the vaporizing chamber; a first fuel path that connects the fuel pump and the fuel injection device; a second fuel path having one end connected to the fuel pump or the first fuel path and the other end connected to the fuel vapor generating section; pressure detection means for detecting pressure of the fuel vapor generating section; and vapor pressure calculation means for calculating fuel vapor pressure based on a detection result of the pressure detection means, the fuel vapor generating section being placed in the fuel tank. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A fuel vapor pressure measuring device comprising:
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a fuel tank for storing fuel; a fuel pump for supplying the fuel in the fuel tank to a fuel injection device; a fuel vapor generating section including a nozzle, a vaporizing chamber, and a venturi, the fuel vapor generating section being configured to inject the fuel from the nozzle to pass through the venturi, thereby vaporizing the fuel in the vaporizing chamber; a first fuel path that connects the fuel pump and the fuel injection device; a second fuel path having one end connected to the fuel pump or the first fuel path and the other end connected to the fuel vapor generating section; pressure detection means for detecting pressure of the fuel vapor generating section; and vapor pressure calculation means for calculating fuel vapor pressure based on a detection result of the pressure detection means, the fuel vapor generating section is configured to allow fuel injected in the venturi to be collected in the venturi. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A fuel vapor pressure measuring device comprising:
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a fuel tank for storing fuel to be supplied to an internal combustion engine; a fuel pump for supplying the fuel in the fuel tank to a fuel injection device; a fuel vapor generating section including a nozzle, a vaporizing chamber, and a venturi, the fuel vapor generating section being configured to inject the fuel from the nozzle to pass through the venturi, thereby vaporizing the fuel in the vaporizing chamber; a first fuel path that connects the fuel pump and the fuel injection device; a second fuel path having one end connected to the fuel pump or the first fuel path and the other end connected to the fuel vapor generating section; pressure detection means for detecting pressure of the fuel vapor generating section; and fuel temperature detection means for detecting a temperature of fuel allowed to pass through the fuel vapor generating section; characteristic storage means for storing fuel vapor characteristic obtained based on a detection result of the pressure detection means and a detection result of the fuel detection means; vapor pressure calculation means for calculating fuel vapor pressure based on the fuel vapor characteristic stored in the characteristic storage means and the fuel temperature detected by the fuel temperature detection means. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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22. A fuel vapor pressure measuring device comprising:
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a fuel tank for storing fuel to be supplied to an internal combustion engine; a fuel pump for supplying the fuel in the fuel tank to a fuel injection device; a fuel vapor generating section including a nozzle, a vaporizing chamber, and a venturi, the fuel vapor generating section being configured to inject the fuel from the nozzle to pass through the venturi, thereby vaporizing the fuel in the vaporizing chamber; a first fuel path that connects the fuel pump and the fuel injection device; a second fuel path having one end connected to the fuel pump or the first fuel path and the other end connected to the fuel vapor generating section; pressure detection means for detecting pressure of the fuel vapor generating section; fuel temperature detection means for detecting a temperature of fuel allowed to pass through the fuel vapor generating section; coolant temperature detection means for detecting a temperature of coolant to cool the internal combustion engine; characteristic storage means for storing fuel vapor characteristic obtained based on a detection result of the pressure detection means and a detection result of the fuel detection means; vapor pressure calculation means for calculating fuel vapor pressure based on the fuel vapor characteristic stored in the characteristic storage means and a coolant temperature detected by the coolant temperature detection means.
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23. A fuel vapor pressure measuring device comprising:
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a fuel tank for storing fuel to be supplied to an internal combustion engine; a fuel pump for supplying the fuel in the fuel tank to a fuel injection device; coolant temperature detection means for detecting a temperature of coolant to cool the internal combustion engine; a fuel vapor generating section including a nozzle, a vaporizing chamber, and a venturi, the fuel vapor generating section being configured to inject the fuel from the nozzle to pass through the venturi, thereby vaporizing the fuel in the vaporizing chamber; a first fuel path that connects the fuel pump and the fuel injection device; a second fuel path having one end connected to the fuel pump or the first fuel path and the other end connected to the fuel vapor generating section; pressure detection means for detecting pressure of the fuel vapor generating section; fuel temperature detection means for detecting a temperature of fuel allowed to pass through the fuel vapor generating section; characteristic storage means for storing fuel vapor characteristic obtained based on a detection result of the pressure detection means and a detection result of the coolant temperature detection means; vapor pressure calculation means for calculating fuel vapor pressure based on the fuel vapor characteristic stored in the characteristic storage means and a coolant temperature detected by the coolant temperature detection means.
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Specification