Fuel cell system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorNorimasa Ishikawa
Life of this patent
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Abstract
A fuel cell system having an on-off valve, such as an injector, disposed in a fuel supply flow path restrains a pressure detection error of a fuel gas in the vicinity of the on-off valve to a small level. The fuel cell system includes a fuel cell, a fuel supply flow path for supplying a fuel gas, which is supplied from a fuel supply source, to the fuel cell, an on-off valve which adjusts the condition of a gas on an upstream side of the fuel supply flow path and then supplies the gas to a downstream side, and a control means which controls the drive of the on-off valve at a predetermined drive cycle, wherein the control means sets the upper limit value of a duty ratio at each drive cycle of the on-off valve.
Claims5
A fuel cell system comprising:
- a fuel cell;
- a fuel supply flow path for supplying a fuel gas, which is supplied from a fuel supply source, to the fuel cell;
- an on-off valve which adjusts the condition of a gas on an upstream side of the fuel supply flow path and supplies the gas to a downstream side;
- a pressure sensor which detects the pressure value of a fuel gas on a downstream side of the on-off valve of the fuel supply flow path, and
- a control device which controls the drive of the on-off valve at a predetermined drive cycle,
- wherein the control device sets an upper limit value of a duty ratio at each drive cycle of the on-off valve on the basis of pressure recover time required from the point of a valve close command of the on-off valve to the point at which a detected pressure value on the pressure sensor recovers.
(canceled)
Dependencies are inferred from the claim text.