A control device for a hybrid vehicle including an internal combustion engine includes: a limiting unit configured to limit an output of the internal combustion engine when temperature of cooling water for cooling the internal combustion engine is equal to or higher than a predetermined temperature; a discharging unit configured to discharge, when internal pressure of a fuel tank is equal to or higher than predetermined pressure, fuel evaporative gas in the fuel tank into an intake passage of the internal combustion engine while the internal combustion engine is being driven; and a prioritizing unit configured to prioritize the limiting of the output of the internal combustion engine by the limiting unit over the discharging of the fuel evaporative gas by the discharging unit, when the discharging unit is to discharge the fuel evaporative gas and the limiting unit is to limit the output of the internal combustion engine.

A tank passage is connected at its one end to a fuel tank, which stores fuel. A canister is connected to the other end of the tank passage and adsorbs evaporated fuel generated by evaporation of fuel in the fuel tank. An electric control valve is operable with current supply to control an amount of fluid flowing through the tank passage by varying an open rate of the tank passage. A fill-up detection part detects that the fuel tank is filled up with fuel based on a fuel level in the fuel tank. A control part controls an operation of the electric control valve. The control part controls the electric control valve in the valve closing direction, which decreases the open rate, when the fill-up detection part detects that the fuel tank is filled up with fuel.

A pressure relief assembly includes a plurality of valve components and a cap configured to house the valve components. The cap includes a ring having a retaining portion. The pressure relief assembly includes a sensor apparatus coupled to the cap via the ring. The sensor apparatus is configured to sense whether a predetermined pressure threshold is reached. The valve components operate to relieve pressure when the predetermined pressure threshold is reached. The sensor apparatus includes a retaining portion engaging the retaining portion of the ring. A valve assembly includes a first valve apparatus and the pressure relief assembly configured to bypass the first valve apparatus. The valve assembly includes a main housing that surrounds the first valve apparatus and the pressure relief assembly. The main housing defines an aperture in which the cap of the pressure relief assembly is at least partially disposed in the aperture.

A fuel vapor processing apparatus includes an adsorbent canister, a vapor path connecting the adsorbent canister to a fuel tank, and a flow control valve disposed in the vapor path. The flow control valve is kept closed while a movement distance of a valve body from a predetermined initial position toward a valve opening direction is less than a predetermined distance. A control unit comprising part of the apparatus is configured to set a valve opening speed of the flow control valve to a first speed under a condition where the movement distance of the valve body is less than the predetermined distance, and to set the valve opening speed of the flow control valve to a second speed lower than the first speed under a condition where the movement distance of the valve body is greater than the predetermined distance.

Disclosed is a method for controlling the pressure inside a fuel tank of a motor vehicle, the motor vehicle including a fuel vapor vent circuit connecting the tank to a fuel vapor canister, the vent circuit including an isolation valve for isolating the tank and a rollover valve. The pressure control method includes steps of: determining an activation duration required for the isolation valve to transition from a closed state to a fully open state, referred to as the full opening duration, when a predefined rollover valve closure risk criterion is satisfied: controlling the isolation valve in repeated activations of respective durations that are shorter than the full opening duration.

An evaporated fuel processing device includes: an evaporated fuel passage connecting a fuel tank and a canister; a purge passage connecting the canister and an intake passage of an internal combustion engine a first purge control valve arranged to open and close the purge passage; a tank open passage connecting a position on an upstream side of the first purge control valve in the purge passage, and the tank; and a second purge control valve arranged to open and close the tank open passage, when the fuel tank becomes a negative pressure, the second purge control valve being opened to introduce an atmospheric pressure through the canister.

A closed tank system includes: a fuel tank; a canister adapted to adsorb evaporative fuel generated in the fuel tank; a fill-up limiting valve provided inside the fuel tank so as to be communicated with the evaporative fuel discharge passage and adapted to operate to close the evaporative fuel discharge passage when a fuel level reaches a predetermined full tank liquid level; a shut-off valve adapted to operate to open or close the evaporative fuel discharge passage; a fuel remaining amount sensor adapted to detect a remaining amount of fuel; and a hardware processor that causes a control section to carry out control for allowing the shut-off valve to be opened or closed. The hardware processor causes the control section to inhibit the control for allowing the shut-off valve to be opened when an engine is in operation and the detected remaining amount of fuel exceeds a predetermined threshold.

A method for operating a fuel tank device for a motor vehicle, with a fuel tank to which a tank ventilation line is assigned, and with a tank shutoff valve for adjusting a flow-through cross section of the tank ventilation line is disclosed. The method includes impinging the tank shutoff valve with a first electric voltage for adjusting a first flow-through cross-section of the tank ventilation line and impinging the tank shutoff valve with a second electric voltage for adjusting a second flow-through cross section of the tank ventilation line; when switching from the first flow-through cross section to the second flow-through cross section and/or vice versa, impinging the tank shutoff valve for a defined transition time period with a transition voltage which lies between the first voltage and the second voltage.

A vaporized fuel processing apparatus in which, if an internal pressure of a fuel tank is high when refueling, a closing valve opens before a refueling cap opens, so that vaporized fuel is flown to a canister via a path with a float valve to lower the internal pressure of the tank. The apparatus includes a refueling switch for instructing a start of refueling to the fuel tank, an internal pressure sensor for detecting a space pressure inside the tank, and a closing valve control means for, if the refueling start signal is output from the refueling switch and the internal pressure of the fuel tank is higher than a set pressure, opening the closing valve within a range in which the float valve does not operate, and increasing the valve-opening speed of the closing valve in accordance with a reduction in the internal pressure of the fuel tank.

Methods and systems are provided for a latchable refueling valve designed to reduce noise associated with opening and closing the valve. In one example, a system may include a valve armature with first and second latch indices formed on an outer diameter of the armature. The latch indices may be rounded and configured to engage with a latch guide to enable rotation between the armature and the latch guide.