摘要:
In an EGR valve, an actuator includes a coil, a rotor body to be driven to rotate when the coil is energized with electric current, and a converting mechanism to convert rotational movement of the rotor body into stroke movement of the rod to bring a valve into or out of contact with a seat. The rod includes a stopper that will contact with a protrusion of the rotor body when the valve is placed in a full closed state. An end face of the stopper and an end face of the protrusion are slanted with respect to a stroke direction of stroke movement of the rod.
摘要:
Disclosed herein is a variable venturi carburetor adapted for controlling the air-fuel ratio by air bleeding operation which includes an actuator for controlling the amount of bleed air in response to the engine running conditions and a fuel jet having a fuel metering portion and an air bleed portion provided downstream of and adjacent to the fuel metering portion. The air bleed portion has an outlet opening adapted for delivering bleed air into the fuel passage and the inside diameter of the air bleed portion is designed to be slightly larger than that of the fuel metering portion. Especially, at engine idle operation, the restriction area of the air bleed portion is designed to become larger than that adjusted by the actuator and the inside diameter of the fuel passage downstream of the air bleed portion is designed to become large in such a manner that air and fuel flows may not be influenced by the restricting operation of the air bleed portion.
摘要:
If the pressure in a supply passage drops at a speed greater than a first determination speed in a state in which a first mode for supplying gas fuel to an internal combustion engine is selected, a control apparatus inhibits selection of the first mode. Then, the control apparatus switches from the first mode to a second mode, in energy other than gas fuel is used. In this state, if the pressure in the supply passage drops at a speed greater than a second determination speed, the control apparatus maintains the state in which the second mode is selected. If the pressure in the supply passage drops at a speed lower than the second determination speed, the control apparatus cancels the inhibition of selection of the first mode when it is detected that a manual on-off valve is opened.
摘要:
A fuel supply device comprises a fuel tank, a reserve cup, a fuel pump, a jet pump, a fuel supply path, an air introducing path, and a gating mechanism. A fuel pump is disposed inside the reserve cup, and configured to inhale fuel in the reserve cup to exhale a part of the fuel to outside the fuel tank. A fuel supply path connects the fuel pump with the jet pump, and is configured to supply the other part of the fuel exhaled by the fuel pump to the jet pump. An air introducing path is in communication with the fuel supply path, and includes an air hole configured to introduce air from outside the fuel pump. A gating mechanism is configured to close the air hole when the fuel pump is driven, and to open the air hole when the fuel pump stops driving.
摘要:
A valve includes a valve housing defining therein a fluid passage composed of a first passage and a second passage, a first valve member configured to open and close the fluid passage, a first biasing member pressing the first valve member in a first valve-closing direction along a flow direction from the first passage to the second passage, a second valve member configured to open and close the fluid passage, a second biasing member pressing the second valve member in a second valve-closing direction along the flow direction from the first passage to the second passage, an electromagnetic driving member having an pressing member opening the first valve member and the second valve member in stages, a third valve member configured to open and close the fluid passage, and a third biasing member pressing the third valve member in a third valve-closing direction along a flow direction from the second passage to the first passage. The third valve member is configured to open the fluid passage when internal pressure of the first passage is higher than internal pressure of the second passage by a predetermined value.
摘要:
An electric pump may comprise a pump case (110, 150) having a pump chamber. An impeller 143 may be rotatably disposed within the pump chamber. The impeller 143 may include a magnetized cylindrical portion 145. A stator 133 may be disposed opposite to the cylindrical portion 145 of the impeller 143. The stator 133 may drive the impeller 143 by applying magnetic forces to the cylindrical portion 145 of the impeller 143. A shaft 146 may be formed integrally with the impeller 143. One end of the shaft 143 may be rotatably supported with respect to the pump case.
摘要:
A fuel supply device has a cover member which is attached to an opening of a fuel tank, a pump unit provided with a pump, and a connecting portion for connecting the cover member and the pump unit. The fuel supply device has a connecting shaft which is formed on either one of the connecting portion or the pump unit, and a connecting hole which is formed on the other. The fuel supply device has a guide mechanism which can guide the pump unit. The guide mechanism includes a first guide portion formed at the connecting portion and a second guide portion formed at the pump unit. One of the first guide portion or the second guide portion includes a protruding portion which protrudes in a position spaced apart from the connecting shaft. The other guide portion is formed to restrict a movable range of the protruding portion.
摘要:
The present invention includes a fuel supply apparatus having a pressure regulator for regulating a pressure of fuel supplied from a fuel pump to a target, such as an internal combustion engine of an automobile. The pressure regulator includes a first pressure chamber, a second pressure chamber and a third pressure chamber each configured to be able to receive a supply of the fuel from the fuel pump. A first diaphragm separates the first pressure chamber and the second pressure chamber from each other. A second diaphragm separates the second pressure chamber and the third pressure chamber from each other. The first pressure chamber has a discharge port that can discharge the fuel supplied into the first pressure chamber. A valve assembly is coupled to the first and second diaphragms, so that the valve assembly can open and close the discharge port of the first pressure chamber in response to the balance of forces applied to the first and second diaphragms by pressures of the fuel within the first, second and third pressure chambers. A controller can control the pressure of the fuel within each of the second and third pressure chambers.
摘要:
Fuel pump (10) may comprise a casing (18) and an impeller (20) rotating within the casing. A group of concavities (20a) may be formed in an upper or a lower face of the impeller. A groove (24) communicating a discharge hole (25) may be formed in a inner face of the casing. The groove extends continuously in a direction of rotation of the impeller in an area facing the group of concavities of the impeller. The groove may have an opening portion (27e) that directly communicates with the discharge hole. The opening portion may be shaped so as to extend in the rotation direction of the impeller, within a span extending from a position corresponding to substantially the central position of the concavities of the impeller, in the radial direction thereof, to a position corresponding to substantially the outer peripheral edge of the concavities of the impeller. The inner peripheral edge (29) of the groove, on the side communicating with the discharge hole, may slant in the downstream end from a position corresponding to substantially the inner peripheral edge of the concavities of the impeller towards a position corresponding to substantially the central position of the concavities of the impeller, in the radial direction thereof, to connect with the opening portion. The opening portion may be formed so as to extend in the rotation direction of the impeller beyond the position (29b) where the inner peripheral edge connects therewith.
摘要:
A method is provided for diffusion bonding a first member (20) and a second member (3) to each other. According to this method, a first joint portion (24) of the first member and a second joint portion (34) of the second member are fitted to each other with a predetermined interference. Thereafter, the first and second members are heated under a condition substantially without oxygen, so that the first and second joint portions are diffusion bonded to each other.