Abstract: A regulator may be configured to reduce an individual difference between products due to a size tolerance of each of a valve seated seat holding member, a valve seated seat, a piston pressure regulating valve, and a main body part. The main body part may be affected by a load of a pressure regulating spring, or a load variation at a set point of the pressure regulating spring. The regulator may be configured without a function loss due to a damage, leakage failure, or the like of the valve seated seat. A pressure regulating valve body 5 may be closely in contact with a valve seated seat 31, and a piston unit 6 that is formed around an outer periphery thereof and that affects a pressure regulating spring 8 are formed separately, the two forming a piston pressure regulating valve 7.

Abstract: Provided is a fuel pressure monitoring system of a vaporizer using a safety module which issues a fault signal by detecting a pressure using a fuel pressure sensor disposed in a pressure regulating chamber of the vaporizer within a predetermined time after an engine is stopped and determining that the pressure regulating mechanism fails when the detected pressure exceeds a threshold stored in a storage device to be increased to a predetermined pressure or higher, and the pressure regulating mechanism is determined to fail only when a water temperature of cooling water in the engine of the vaporizer reaches a predetermined temperature at which warming up of the engine can be determined to be completed.

Abstract: A fuel supply system includes a housing including a housing body in which a fuel storage tank serving as a reservoir tank as well and a lid covering an opening of the housing body in an air-tight manner. The housing includes a fuel pump, a regulator configured to regulate a pressure of the fuel to return excess fuel to the fuel storage tank, a regulator holding member supporting the regulator, and a fuel storage volume adjusting unit that maintains the liquid surface level of the stored fuel at a fixed level. The fuel supply system supplies fuel at a predetermined pressure from a fuel discharging pipe of the lid to the engine. The regulator holding member is formed in such a manner in a planar view as to fill most of interspace in the opening of the housing body to close the upper portion of the fuel storage tank.

Abstract: A supporting member supporting a valve body includes a supporting member body having a semispherical bottom portion that makes contact with the top face of the valve body and a securing recess that is provided in the center and at a predetermined axial location to adjoin a through hole provided in the valve body, and a securing member including an engaging portion that has a form of a shaft having a predetermined diameter made of an elastic material and protrudes from a proximal end and a securing projection that swells out from a predetermined axial location of the shaft portion to fit into a securing recess provided in a through hole in the supporting member body.

Abstract: To provide a fuel supply system in which fuel stored in a fuel storage tank formed in a housing main body can be supplied by a high-pressure pump provided in the housing main body in spite of a rapid acceleration or a rapid deceleration of an engine, two types of connectors, which is a first connector having a low-pressure pump having a connection port for a fuel supply pipe from a fuel tank and a second connector having no pump, can be selectively attached via a common connector mounting part formed on a wall surface of a housing main body, and by using a housing having therein the commonly used high-pressure pump, a fuel supply system using an external pump and a fuel supply system using no external pump can be respectively manufactured in accordance with the purpose of use.

Abstract: A purpose of the present invention is to improve the oil removal rate in an oil separator that separates and removes oil from gas including the oil as an impurity. The oil separator according to the present invention is characterized by including a first filter member (42) in a cylindrical shape made with a cylindrical filter material having an air permeability, and positioned such that the target gas flows in from a hollow part as well as a central axis is in an up-down direction, and a second filter member (43) made with a filter material having air permeability and wrapped around the first filter member (42) along an outer surface thereof with a predetermined spacing from the outer surface of the first filter member (42).

Abstract: To provide a fuel supply system in which fuel stored in a fuel storage tank formed in a housing main body can be supplied by a high-pressure pump provided in the housing main body in spite of a rapid acceleration or a rapid deceleration of an engine, two types of connectors, which is a first connector having a low-pressure pump having a connection port for a fuel supply pipe from a fuel tank and a second connector having no pump, can be selectively attached via a common connector mounting part formed on a wall surface of a housing main body, and by using a housing having therein the commonly used high-pressure pump, a fuel supply system using an external pump and a fuel supply system using no external pump can be respectively manufactured in accordance with the purpose of use.

Abstract: The invention provides a control device for mutually monitoring two microcomputers at a low cost while reducing a parts number and doubly monitoring abnormality in each of the microcomputers. The control device transmits a reset signal to a main microcomputer and resets the main microcomputer when a frequency of a first pulse signal deviates from a normal frequency range determined by a frequency calculating means, in which the first pulse signal is output from the main microcomputer, and the frequency calculating means calculates a frequency of the first pulse signal by an input of the first pulse signal to a sub microcomputer. The control device transmits a reset signal to the sub microcomputer and resets the sub microcomputer when a frequency of a second pulse signal deflects from a normal frequency range, by an input of the second pulse signal to the main microcomputer from the sub microcomputer.

Abstract: A purpose of the present invention is to improve the oil removal rate in an oil separator that separates and removes oil from gas including the oil as an impurity. The oil separator according to the present invention is characterized by including a first filter member (42) in a cylindrical shape made with a cylindrical filter material having an air permeability, and positioned such that the target gas flows in from a hollow part as well as a central axis is in an up-down direction, and a second filter member (43) made with a filter material having air permeability and wrapped around the first filter member (42) along an outer surface thereof with a predetermined spacing from the outer surface of the first filter member (42).

Abstract: There is provided a filter device for gas including: a cylindrical filter case formed to be airtight; a hollow filter which is formed with an opening in a bottom part thereof, a top part of which is obstructed, and which is placed inside the filter case in such a manner that a central axis thereof substantially aligns with a central axis of the filter case; and a flow controlling plate which is attached roundly between an outlet in the top part of the filter case and the top part of the hollow filter on an inner peripheral wall of the filter case, wherein gas introduced through an inlet in a bottom part of the filter case is introduced into a hollow part of the hollow filter, and also passes through a space between an outer periphery of the hollow filter and the inner peripheral wall of the filter case, and then is discharged through the outlet.

Abstract: When control to maintain a constant engine rotation number is executed, the electronic control unit constantly monitors an error of detected throttle position data with respect to a desired throttle control value, executes a first stage of a failure judgment method to judge that a failure of a throttle control system has occurred in a case where an absolute value of the error exceeds a predetermined threshold value continuously for a predetermined time or longer, and executes a second stage of the failure judgment method to judge that a serious failure has occurred in the system in a case where a detected engine rotation number exceeds a predetermined rotation number continuously for a predetermined time or longer, to perform predetermined operations in accordance with the judgment results.

Abstract: The invention provides a control device for mutually monitoring two microcomputers at a low cost while reducing a parts number and doubly monitoring abnormality in each of the microcomputers. The control device transmits a reset signal to a main microcomputer and resets the main microcomputer when a frequency of a first pulse signal deviates from a normal frequency range determined by a frequency calculating means, in which the first pulse signal is output from the main microcomputer, and the frequency calculating means calculates a frequency of the first pulse signal by an input of the first pulse signal to a sub microcomputer. The control device transmits a reset signal to the sub microcomputer and resets the sub microcomputer when a frequency of a second pulse signal deflects from a normal frequency range, by an input of the second pulse signal to the main microcomputer from the sub microcomputer.

Abstract: There is provided a filter device for gas including: a cylindrical filter case formed to be airtight; a hollow filter which is formed with an opening in a bottom part thereof, a top part of which is obstructed, and which is placed inside the filter case in such a manner that a central axis thereof substantially aligns with a central axis of the filter case; and a flow controlling plate which is attached roundly between an outlet in the top part of the filter case and the top part of the hollow filter on an inner peripheral wall of the filter case, wherein gas introduced through an inlet in a bottom part of the filter case is introduced into a hollow part of the hollow filter, and also passes through a space between an outer periphery of the hollow filter and the inner peripheral wall of the filter case, and then is discharged through the outlet.

Abstract: An air-fuel ratio control device comprising a fuel supply unit, engine operation state detector, air-fuel ratio information detector, and an electronic control unit is disclosed. The electronic control unit determines a fuel injection amount which realizes a target air-fuel ratio while using engine load information by the engine operation state detector on the basis of air-fuel ratio information by the air-fuel ratio information detector, and then outputs a driving signal to the fuel supply unit, to execute feedback control mainly at an excessively rich side air-fuel ratio, characterized in that the air-fuel ratio information detector is an exhaust gas temperature sensor.

Abstract: A carburetor with a starting fuel supply mechanism which additionally supplies a starting fuel at the start of an engine includes a choke valve in suction passages extending through a main body; and a starting fuel supply path disposed as a bypass of a main fuel passage to connect a float chamber to the suction passages, the starting fuel supply path being provided with an opening/closing valve opened by interlocking with the closing operation of the choke valve, and a valve body of the choke valve which performs the closing operation presses valve opening/closing device while abutting on one end of the valve opening/closing device, to open the opening/closing valve of the starting fuel supply path, so that the starting fuel can be prepared to be supplied.

Abstract: The invention aims at providing an engine control experimenting apparatus which enables to easily carry out a confirmation test of an operation in all operation states with regard to the performance of various engine control parts constituting an engine system. In this engine control experimenting apparatus, various engine control parts, which are actually mounted on an engine and are required for engine control, are constructed in a state where electrical transmission and fuel supply are enabled in a manner similar to a case where the engine control parts are mounted on a real engine, and a model-based control is performed on the same conditions as those of the actual engine, on the basis of experimental data of the real engine written in an electronic control unit constituting each of the engine control parts.

Abstract: Even if the engine structure is not capable of continuous operation in the vicinity of stoichiometric air-fuel ratio, this engine is in the stoichiometric combustion region when condition such as low load and stable engine rotation is met, and the feedback control using the O2 sensor, although temporary, becomes possible. Therefore, the air-fuel ratio control system performs this feedback, and derives and sets the constant value for correction to attain the air-fuel ratio suited to the engine. Thereafter, the optimal air-fuel ratio is controlled at the normal control mode just by correcting the fuel injection quantity using the constant value.

Abstract: When control to maintain a constant engine rotation number is executed, the electronic control unit constantly monitors an error of detected throttle position data with respect to a desired throttle control value, executes a first stage of a failure judgment method to judge that a failure of a throttle control system has occurred in a case where an absolute value of the error exceeds a predetermined threshold value continuously for a predetermined time or longer, and executes a second stage of the failure judgment method to judge that a serious failure has occurred in the system in a case where a detected engine rotation number exceeds a predetermined rotation number continuously for a predetermined time or longer, to perform predetermined operations in accordance with the judgment results.

Abstract: There is provided an air-fuel ratio control device comprising: fuel supply means; engine operation state detection means; air-fuel ratio information detection means; and an electronic control unit, the electronic control unit being configured to determine a fuel injection amount which realizes a target air-fuel ratio while using engine load information by the engine operation state detection means on the basis of air-fuel ratio information by the air-fuel ratio information detection means, and then output a driving signal to the fuel supply means, to execute feedback control mainly at an excessively rich side air-fuel ratio, characterized in that the air-fuel ratio information detection means is an exhaust gas temperature sensor, and while estimating an air-fuel ratio at this time on the basis of detected exhaust gas temperature information by a predetermined obtaining method, the air-fuel ratio is used for the control.