CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
First Claim
1. A control device for an internal combustion engine capable of using a plurality of types of fuels having different properties, the control device comprising:
- a fuel property sensor that is installed in a fuel line between a fuel tank and a delivery pipe;
fuel property change detection means for detecting a fuel property change from a signal of the fuel property sensor;
cylinder deactivation means for deactivating some of a plurality of cylinders by halting a fuel injection from an injector; and
cylinder deactivation prohibition means for prohibiting the deactivation of a cylinder before the completion of a fuel property change in the delivery pipe when a fuel property change is detected.
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Accused Products
Abstract
An object of the present invention is to avoid an air-fuel ratio difference between cylinders upon recovery from a cylinder deactivation in a situation where some of a plurality of cylinders of an internal combustion engine capable of using a plurality of types of fuels having different properties are to be deactivated upon the halt of fuel injection from an injector.
To accomplish the object, a control device to which the present invention is applied includes a fuel property sensor that is installed in a fuel line between a fuel tank and a delivery pipe, and detects a fuel property change from a change in a signal of the fuel property sensor. Upon detection of a fuel property change, the control device prohibits the deactivation of a cylinder before the completion of a fuel property change in the delivery pipe.
34 Citations
9 Claims
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1. A control device for an internal combustion engine capable of using a plurality of types of fuels having different properties, the control device comprising:
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a fuel property sensor that is installed in a fuel line between a fuel tank and a delivery pipe; fuel property change detection means for detecting a fuel property change from a signal of the fuel property sensor; cylinder deactivation means for deactivating some of a plurality of cylinders by halting a fuel injection from an injector; and cylinder deactivation prohibition means for prohibiting the deactivation of a cylinder before the completion of a fuel property change in the delivery pipe when a fuel property change is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control device for an internal combustion engine capable of using a plurality of types of fuels having different properties, the control device comprising:
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a fuel property sensor that is installed in a fuel line between a fuel tank and a delivery pipe; and a controller that is programmed to; detect a fuel property change from a signal of the fuel property sensor; deactivate some of a plurality of cylinders by halting a fuel injection from an injector; and prohibit the deactivation of a cylinder before the completion of a fuel property change in the delivery pipe when a fuel property change is detected.
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Specification