Method and device for correcting a fuel injection quantity in a diesel engine
First Claim
1. A method of correcting a fuel injection quantity in a diesel engine, comprising correcting a shift in an engine rotation pulse and dispersion of responses of an electromagnetic spill valve by correcting means which provide a fixed output, correcting a control signal to a fuel injection pump in response to said fixed output from said correcting means,detecting abnormal outputs from said correcting means;
- andcorrecting a control signal to said fuel injection pump by use of a fixed value when the output from said correcting means is abnormal.
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Accused Products
Abstract
According to the present invention, when means is provided for correcting a shift in phase of an engine rotation pulse and a dispersion in responses of an electromagnetic spill valve, and a control signal to a fuel injection pump is corrected in response to an output from the correcting means, if abnormality of output from the correcting means is detected, then the control signal to the fuel injection pump is corrected by use of a fixed valve. As a consequence, even when the output from the correcting means is abnormal, neither excessively large nor excessively small correction is performed and the running at the lowest level can be made, preventing the diesel smoke from being deteriorated and the engine from being damaged.
30 Citations
7 Claims
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1. A method of correcting a fuel injection quantity in a diesel engine, comprising correcting a shift in an engine rotation pulse and dispersion of responses of an electromagnetic spill valve by correcting means which provide a fixed output, correcting a control signal to a fuel injection pump in response to said fixed output from said correcting means,
detecting abnormal outputs from said correcting means; - and
correcting a control signal to said fuel injection pump by use of a fixed value when the output from said correcting means is abnormal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for correcting a fuel injection quantity in a diesel engine, comprising means for correcting a shift in an engine rotation pulse and a dispersion of responses of an electromagnetic spill valve such that a control signal to a fuel injection pump is corrected in response to a fixed output from said correcting means,
means for detecting abnormal output from said correcting means; - and
means for correcting a control signal to said fuel injection pump by use of a fixed value when the output from said correcting means is abnormal.
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Specification