Control apparatus for sealed fuel tank system
First Claim
1. A control apparatus for a sealed fuel tank system which is applied to an engine including a throttle valve provided in an intake pipe, and which includes a vaporized fuel supply pipe that connects a fuel tank and the intake pipe, and a control valve that opens and closes the vaporized fuel supply pipe, the control apparatus comprising:
- a controller which maintains the control valve in an open state on a condition that a pressure in the fuel tank is equal to or higher than a reference determination pressure; and
corrects an opening amount of the throttle valve to a value equal to a first control opening amount that is smaller than a required opening amount set based on an operating state of the engine by a first correction opening amount when the control valve is in the open state,wherein the controller monitors a correction coefficient for a command value indicating a fuel injection amount in air-fuel ratio control for the engine, and variably sets the first correction opening amount based on a correspondence relation between an absolute value of a difference between the correction coefficient and a reference value, and the first correction opening amount, which is defined such that the first correction opening amount is decreased with an increase in the absolute value of the difference between the correction coefficient and the reference value.
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Accused Products
Abstract
A control apparatus is provided for a sealed fuel tank system which is applied to an engine including a throttle valve provided in an intake pipe, and which includes a vaporized fuel supply pipe that connects a fuel tank and the intake pipe, and a control valve that opens and closes the vaporized fuel supply pipe. The control apparatus includes a controller which maintains the control valve in an open state on the condition that a pressure in the fuel tank is equal to or higher than a reference determination pressure; and corrects an opening amount of the throttle valve to a value equal to a first control opening amount that is smaller than a required opening amount set based on an operating state of the engine by a first correction opening amount when the control valve is in the open state.
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Citations
22 Claims
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1. A control apparatus for a sealed fuel tank system which is applied to an engine including a throttle valve provided in an intake pipe, and which includes a vaporized fuel supply pipe that connects a fuel tank and the intake pipe, and a control valve that opens and closes the vaporized fuel supply pipe, the control apparatus comprising:
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a controller which maintains the control valve in an open state on a condition that a pressure in the fuel tank is equal to or higher than a reference determination pressure; and corrects an opening amount of the throttle valve to a value equal to a first control opening amount that is smaller than a required opening amount set based on an operating state of the engine by a first correction opening amount when the control valve is in the open state, wherein the controller monitors a correction coefficient for a command value indicating a fuel injection amount in air-fuel ratio control for the engine, and variably sets the first correction opening amount based on a correspondence relation between an absolute value of a difference between the correction coefficient and a reference value, and the first correction opening amount, which is defined such that the first correction opening amount is decreased with an increase in the absolute value of the difference between the correction coefficient and the reference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A control apparatus for a sealed fuel tank system which is applied to an engine including a throttle valve provided in an intake pipe, and which includes a vaporized fuel supply pipe that connects a fuel tank and the intake pipe, and a control valve that opens and closes the vaporized fuel supply pipe, the control apparatus comprising:
a controller which maintains the control valve in an open state on a condition that a pressure in the fuel tank is equal to or higher than a first reference determination pressure and which monitors a correction coefficient for a command value indicating a fuel injection amount in air-fuel ratio control for the engine and which corrects the opening amount of the throttle valve to a value equal to a second control opening amount that is larger than a required opening amount set based on an operating state of the engine by a second correction opening amount when an absolute value of a difference between the correction coefficient and a reference value is equal to or larger than a predetermined difference on a condition that the control valve is in the open state. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A control apparatus for a sealed fuel tank system which is applied to an engine including a throttle valve provided in an intake pipe, and which includes a vaporized fuel supply pipe that connects a fuel tank and the intake pipe, and a control valve that opens and closes the vaporized fuel supply pipe, the control apparatus comprising:
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a controller which maintains the control valve in an open state on a condition that a pressure in the fuel tank is equal to or higher than a reference determination pressure and which corrects an opening amount of the throttle valve to a value equal to a first control opening amount that is smaller than a required opening amount set based on an operating state of the engine by a first correction opening amount when the control valve is in the open state and wherein the controller compensates for a decrease in an output of the engine which is caused by correction of the opening amount of the throttle valve to the value equal to the first control opening amount. - View Dependent Claims (21, 22)
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Specification