THROTTLE CONTROLLER AND THROTTLE CONTROLLING METHOD
First Claim
1. A throttle controller that controls an opening degree of a throttle valve installed in an intake passage of an engine, whereinan opening degree of the throttle valve is defined as a throttle opening TA,a target value of the throttle opening degree TA is defined as a target opening degree TA*,a maximum value in a control range of the throttle opening degree TA is defined as a maximum opening degree TAmax,a required value of a load factor KL of the engine is defined as a required load factor KL*,a maximum value of the load factor KL in a current controlled state of the engine is defined as a maximum load factor KLmax,a ratio of an intake pressure after passing through the throttle valve to an intake pressure before passing through the throttle valve is defined as a throttle upstream-downstream pressure ratio RP,the throttle upstream-downstream pressure ratio RP required to cause the load factor KL to be the required load factor KL* is defined as a required pressure ratio RP*,the throttle opening degree TA when the throttle upstream-downstream pressure ratio RP is a specified value RPwot is defined as a switching point opening degree TAwot,the load factor KL when the throttle upstream-downstream pressure ratio RP is the specified value RPwot is defined as a switching point load factor KLwot,the throttle controller is configured to execute a target opening degree calculation process and a throttle actuation process,in the target opening degree calculation process, the throttle controllercalculates, as the target opening degree TA*, the throttle opening degree TA at which the throttle upstream-downstream pressure ratio RP is the required pressure ratio RP* in a case in which the value of the required pressure ratio RP* is less than or equal to the specified value RPwot, andcalculates, as the target opening degree TA*, a value that satisfies a following expression in a case in which the value of the required pressure ratio RP* exceeds the specified value RPwot, and
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Accused Products
Abstract
When a required pressure ratio RP* is less than or equal to a calculation switching pressure ratio RPwot, an engine control unit calculates, as a target opening degree TA*, a throttle opening degree TA at which a throttle upstream-downstream pressure ratio RP is the required pressure ratio RP*. When the required pressure ratio RP* exceeds the calculation switching pressure ratio RPwot, the engine control unit obtains a switching point opening degree TAwot, a switching point load factor KLwot and a maximum load factor KLmax, and calculates the target opening degree TA* as a value that has a linear relationship with the required load factor KL* between the switching point opening degree TAwot and the maximum opening degree TAmax.
4 Citations
6 Claims
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1. A throttle controller that controls an opening degree of a throttle valve installed in an intake passage of an engine, wherein
an opening degree of the throttle valve is defined as a throttle opening TA, a target value of the throttle opening degree TA is defined as a target opening degree TA*, a maximum value in a control range of the throttle opening degree TA is defined as a maximum opening degree TAmax, a required value of a load factor KL of the engine is defined as a required load factor KL*, a maximum value of the load factor KL in a current controlled state of the engine is defined as a maximum load factor KLmax, a ratio of an intake pressure after passing through the throttle valve to an intake pressure before passing through the throttle valve is defined as a throttle upstream-downstream pressure ratio RP, the throttle upstream-downstream pressure ratio RP required to cause the load factor KL to be the required load factor KL* is defined as a required pressure ratio RP*, the throttle opening degree TA when the throttle upstream-downstream pressure ratio RP is a specified value RPwot is defined as a switching point opening degree TAwot, the load factor KL when the throttle upstream-downstream pressure ratio RP is the specified value RPwot is defined as a switching point load factor KLwot, the throttle controller is configured to execute a target opening degree calculation process and a throttle actuation process, in the target opening degree calculation process, the throttle controller calculates, as the target opening degree TA*, the throttle opening degree TA at which the throttle upstream-downstream pressure ratio RP is the required pressure ratio RP* in a case in which the value of the required pressure ratio RP* is less than or equal to the specified value RPwot, and calculates, as the target opening degree TA*, a value that satisfies a following expression in a case in which the value of the required pressure ratio RP* exceeds the specified value RPwot, and
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5. A throttle controller that controls an opening degree of a throttle valve installed in an intake passage of an engine, wherein
an opening degree of the throttle valve is defined as a throttle opening TA, a target value of the throttle opening degree TA is defined as a target opening degree TA*, a maximum value in a control range of the throttle opening degree TA is defined as a maximum opening degree TAmax, a required value of a load factor KL of the engine is defined as a required load factor KL*, a maximum value of the load factor KL in a current controlled state of the engine is defined as a maximum load factor KLmax, a ratio of an intake pressure after passing through the throttle valve to an intake pressure before passing through the throttle valve is defined as a throttle upstream-downstream pressure ratio RP, the throttle upstream-downstream pressure ratio RP required to cause the load factor KL to be the required load factor KL* is defined as a required pressure ratio RP*, the throttle opening degree TA when the throttle upstream-downstream pressure ratio RP is a specified value RPwot is defined as a switching point opening degree TAwot, the load factor KL when the throttle upstream-downstream pressure ratio RP is the specified value RPwot is defined as a switching point load factor KLwot, the throttle controller comprises circuitry that is configured to execute a target opening degree calculation process and a throttle actuation process, in the target opening degree calculation process, the throttle controller calculates, as the target opening degree TA*, the throttle opening degree TA at which the throttle upstream-downstream pressure ratio RP is the required pressure ratio RP* in a case in which the value of the required pressure ratio RP* is less than or equal to the specified value RPwot, and calculates, as the target opening degree TA*, a value that satisfies a following expression in a case in which the value of the required pressure ratio RP* exceeds the specified value RPwot, and
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6. A throttle controlling method for controlling an opening degree of a throttle valve installed in an intake passage of an engine, wherein
an opening degree of the throttle valve is defined as a throttle opening TA, a target value of the throttle opening degree TA is defined as a target opening degree TA*, a maximum value in a control range of the throttle opening degree TA is defined as a maximum opening degree TAmax, a required value of a load factor KL of the engine is defined as a required load factor KL*, a maximum value of the load factor KL in a current controlled state of the engine is defined as a maximum load factor KLmax, a ratio of an intake pressure after passing through the throttle valve to an intake pressure before passing through the throttle valve is defined as a throttle upstream-downstream pressure ratio RP, the throttle upstream-downstream pressure ratio RP required to cause the load factor KL to be the required load factor KL* is defined as a required pressure ratio RP*, the throttle opening degree TA when the throttle upstream-downstream pressure ratio RP is a specified value RPwot is defined as a switching point opening degree TAwot, the load factor KL when the throttle upstream-downstream pressure ratio RP is the specified value RPwot is defined as a switching point load factor KLwot, the throttle controlling method comprising: -
calculating, as the target opening degree TA*, the throttle opening degree TA at which the throttle upstream-downstream pressure ratio RP is the required pressure ratio RP* in a case in which the value of the required pressure ratio RP* is less than or equal to the specified value RPwot; calculating, as the target opening degree TA*, a value that satisfies a following expression in a case in which the value of the required pressure ratio RP* exceeds the specified value RPwot; and
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Specification
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Current AssigneeToyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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Original AssigneeToyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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InventorsWANIBE, Masahiro
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current
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CPC Class CodesF02D 11/105 characterised by the functi...F02D 2009/022 Throttle control function p...F02D 2200/0402 the parameter being determi...F02D 2200/0404 Throttle positionF02D 2200/0406 Intake manifold pressureF02D 41/0002 Controlling intake airF02D 9/02 concerning induction condui...
