Engine output torque control system
First Claim
1. An engine output torque control system for a multiple cylinder engine comprisinga torque reduction determining means for determining whether a predetermined torque-reduction condition has been satisfied and determining an amount of the engine output torque reduction to be performed when the torque-reduction condition has been satisfied,a fuel supply limiting means for limiting fuel supply to at least one selected cylinder of the engine when the torque reduction determining means determines that the engine output reduction is to be performed,a fuel limiting level determining means for determining the number of cylinders to which fuel supply is to be limited according to the engine output torque reduction amount,a fuel injection cylinder determining means for determining which one of the cylinders is about to undergo fuel injection, anda fuel supply limitation control means for causing the fuel supply limiting means to limit fuel supply to the cylinder which first undergoes fuel injection after the torque reduction determining means determines that the engine output torque reduction is to be performed at least in the fuel injection timing immediately after the determining, and for causing the fuel supply limiting means to limit the fuel supply to the cylinders which are selected according to the number of cylinders determined by the fuel limiting level determining means.
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Accused Products
Abstract
An output torque control system for a multiple cylinder engine limits fuel supply to one or more selected cylinder(s) of the engine according to a predetermined fuel limiting pattern when the engine output torque reduction is to be performed. Fuel supply to the cylinder which first comes to the fuel injection timing after it is determined that the engine output torque reduction is to be performed is limited at least in the fuel injection timing immediately after the determination independently from the predetermined fuel limiting pattern.
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Citations
10 Claims
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1. An engine output torque control system for a multiple cylinder engine comprising
a torque reduction determining means for determining whether a predetermined torque-reduction condition has been satisfied and determining an amount of the engine output torque reduction to be performed when the torque-reduction condition has been satisfied, a fuel supply limiting means for limiting fuel supply to at least one selected cylinder of the engine when the torque reduction determining means determines that the engine output reduction is to be performed, a fuel limiting level determining means for determining the number of cylinders to which fuel supply is to be limited according to the engine output torque reduction amount, a fuel injection cylinder determining means for determining which one of the cylinders is about to undergo fuel injection, and a fuel supply limitation control means for causing the fuel supply limiting means to limit fuel supply to the cylinder which first undergoes fuel injection after the torque reduction determining means determines that the engine output torque reduction is to be performed at least in the fuel injection timing immediately after the determining, and for causing the fuel supply limiting means to limit the fuel supply to the cylinders which are selected according to the number of cylinders determined by the fuel limiting level determining means.
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8. An engine output torque control system for a multiple cylinder engine comprising
a torque reduction determining means for determining whether a predetermine torque-reduction condition has been satisfied and determines an amount of the engine output torque reduction is to be performed when the torque-reduction condition has been satisfied, a fuel supply cutting means for cutting fuel supply to at least one selected cylinder of the engine when the torque reduction determining means determines that the engine output torque reduction is to be performed, a fuel cutting level determining means which determines the number of cylinders to which fuel supply is to be out according to the engine output torque reduction amount, a fuel injection cylinder determining means which determines which of the cylinders is about to undergo fuel injection, and a fuel supply cutting control means for causing the fuel supply cutting means to cut fuel supply to the cylinder which first undergoes fuel injection after the torque reduction determining means determines that the engine output torque reduction is to be performed at least in the fuel injection timing immediately after the determination, and for causing the fuel supply cutting means to cut the fuel supply to the cylinders which are selected according to the number of cylinders determined by the fuel cutting level determining means.
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9. An engine output torque control system for a multiple cylinder engine comprising
a torque reduction determining means for determining whether a predetermined torque-reduction condition has been satisfied and determines an amount of the engine output torque reduction to be performed when the torque-reduction condition has been satisfied, a fuel supply limiting means for limiting fuel supply to at least one selected cylinder of the engine when the torque reduction determining means determines that the engine output torque reduction is to be performed, a fuel injection cylinder determining means for determining which one of the cylinders is about to undergo fuel injection, a fuel limiting combination determining means for determining an actual combination of cylinders to which fuel supply is to be limited in response to the determination of said one of the cylinders by the fuel injection cylinder determining means, the engine output torque reduction amount and a predetermined map showing the relation between the engine output torque reduction amount and a hypothetical combination of cylinders top which fuel supply is to be limited so that the cylinders to which fuel supply is to be limited are determined according to the results of the determination of said one of the cylinders, and a fuel supply limitation control means for causing the fuel supply limiting means to limit fuel supply to the cylinders in response to the determination by the fuel limiting combination determining means.
Specification