摘要:
It is proposed a method for controlling a pressure inside a fuel tank system comprising a fuel tank (150) and a controllable pressure relief valve. The method consists in: - assessing whether a predetermined vapor expulsion risk is present, the predetermined vapor expulsion risk pertaining to a vapor expulsion from a main volume of the tank (150) into a space accessible to an operator; - if said risk is present, operating the pressure relief valve in accordance with a first pressure threshold, - if the risk is not present, operating the pressure relief valve in accordance with a second pressure threshold which is higher than the first pressure threshold.
摘要:
It is proposed a fuel tank leak detection system comprising: a test cell for receiving a portion of on-board fuel; a heater mounted within the test cell for heating the fuel in the test cell so as to create a pressure build-up within the fuel tank; and a controller for: - obtaining a first information relative to the amount of pressure build-up created within the fuel tank and a second information relative to the amount of energy introduced by the heater in the test cell; and - detecting a leak using said first and second information.
摘要:
A vehicle fuel system is provided that includes a fuel tank and a manual vent system. The manual vent system includes an emergency valve and an actuator. The manual vent system is configured to cause the emergency valve to open after the actuator has been actuated.
摘要:
A fuel vapor gas purge system includes a passage forming member (22) forming an intake passage of an internal combustion engine (2), a valve device (15) being attached to the passage forming member and including a valve element (152) switchable between an allowed state in which the vaporized fuel is allowed to flow into the intake passage and a blocked state in which the flow of the vaporized fuel into the intake passage is blocked, an electric circuit (1510) energized to generate a driving force to drive the valve element into the allowed state or the blocked state, a switch portion (151, 221) including an electric contact portion that causes the electric circuit to be in a conductive state when the valve device is attached to the passage forming member, and causes the electric circuit to be in a nonconductive state when the valve device is detached from the passage forming member.
摘要:
Method for controlling a filling operation of a vehicular liquid storage system comprising a tank equipped with a fill level limiting valve. The method comprises: - detecting the start of a first filling event; - measuring a first fill level of said tank; - verifying whether said measured first fill level has reached a predetermined fill level; - if said verifying is positive, starting a first timer for a first amount of time; - upon expiry of said first timer, closing said fill level limiting valve.
摘要:
A method and a system for control of a low-pressure circuit in a fuel system of a vehicle, which circuit is arranged to provide the vehicle's engine with fuel from at least one fuel tank via a pressure change system. The system includes a determination unit to make a determination of a future working point for the engine. The determination unit bases this determination on information about a section of road ahead. The system also has a pump operating unit which operates at least one controllable fuel pump which is part of the low-pressure circuit. The pump operating unit bases this operation on the future working point.
摘要:
The invention relates to a method for leakage diagnosis in a fuel tank system (1) of an internal combustion engine (2) of a motor vehicle, wherein the fuel tank system (1) has a fuel tank (16) and a storage element (19) for the temporary storage of hydrocarbons (23), wherein the fuel tank (16) and the storage element (19) are connected to one another in such a way that the hydrocarbons (23) which outgas from a fuel (17) which is situated in the fuel tank (16) are stored temporarily in the storage element (19), wherein the storage element (19) can be emptied by way of a purge air pump (7), wherein fresh air (24) can be conveyed by way of the purge air pump (7) through a fresh air line (42) to the storage element (19), as a result of which the hydrocarbons (23) can be released from the storage element (19) and can be fed through a hydrocarbon/air mixture line (43) to the internal combustion engine (2) for combustion, wherein the fresh air line (42) can be closed by way of a first valve (10), and the hydrocarbon/air mixture line (43) can be closed by way of a second valve (15), and wherein a pressure sensor (8) is arranged in the fuel tank system (1). In order to obtain reliable statements about the state of the fuel tank system, a stationary period of the motor vehicle is waited for in a first method step, the first valve (10) and the second valve (15) are closed in a second method step, the pressure change in the fuel tank system (1) is measured by way of the pressure sensor (8) within a predefined first time interval in a third method step, the first valve (10) or the second valve (15) is opened, and a positive pressure is built up in the fuel tank system (1) by way of the purge air pump (7) until a predefined positive pressure is reached in a fourth method step, the valve (10, 15) which was opened in the fourth method step is closed again in a fifth method step, the pressure change in the fuel tank system (1) is measured by way of the pressure sensor (8) within a predefined second time interval in a sixth method step, and the pressure changes which were measured in the third method step and in the sixth method step are compared with one another in a seventh method step, and the results are derived from said comparison for leakage diagnosis.
摘要:
It is proposed an assembly comprising a plastic container and a component attached to the container by means of an attachment system, the container having a circular attachment portion. The attachment system comprises: - a ring shaped member (1) comprising a top flange (11), a bottom flange (12) and a frustoconical side wall (13) connecting the top flange and the bottom flange, the bottom flange and a portion of the frustoconical side wall being embedded in the attachment portion, the ring shaped member further comprising peripheral tabs (14); - a plurality of engaging claw parts, each engaging claw part being configured to engage a peripheral tab and to press the component against the attachment portion.
摘要:
A valve assembly for a tank of a vehicle and a method of creating a vacuum are disclosed. A valve body defines a cavity and an outlet in fluid communication with the cavity for venting the tank. The assembly includes a seat disposed in the cavity of the valve body. The seat separates the cavity into first and second cavity portions. The seat defines an aperture to provide fluid communication between the first and second cavity portions. The assembly includes a cover device disposed between the seat and the outlet. The cover device defines at least one hole therethrough. The cover device is movable between a rest position engaging the seat to minimize fluid communication between the aperture and the hole and an actuated position spaced from the seat to increase fluid communication between the aperture and the hole when a vacuum is created in the first cavity portion.