Method for identifying the thresholds at which pollutant gases are emitted with a view to controlling the operation of a motor vehicle in stop and start mode
First Claim
1. Method for identifying emissions thresholds for pollutant gases for purposes of controlling the stop-and-start mode operation of stopping an engine just before and during a motor vehicle standstill, comprising the following steps:
- calculating, at each restart, the quantity of fuel injected,calculating the difference between the quantity of fuel injected and the normal quantity of fuel needed, the resulting quantity being taken to represent the quantity of fuel injected but not burned,comparing said quantity of fuel injected but not burned to a preset threshold value based on the distance driven,deactivating or not the stop-and-start mode operation, according to whether or not said quantity of fuel injected but not burned is greater than the preset threshold value.
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Abstract
Method for identifying the thresholds at which pollutant gases are emitted with a view to controlling the operation in “stop and start” mode by stopping an engine just before and while a motor vehicle is stationary, whereby, upon each re-start, the amount of fuel injected is calculated, and the difference between the amount of fuel injected and the normal amount of fuel needed is calculated, the said resulting quantity being considered to represent the amount of fuel that was injected but not burnt; the said amount of fuel injected but not burnt is then compared against a predetermined threshold value, according to the distance covered, and finally, “stop and start” operation is or is not inhibited according to whether the said amount of fuel injected but not burnt is above or below the predetermined threshold value.
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Citations
6 Claims
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1. Method for identifying emissions thresholds for pollutant gases for purposes of controlling the stop-and-start mode operation of stopping an engine just before and during a motor vehicle standstill, comprising the following steps:
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calculating, at each restart, the quantity of fuel injected, calculating the difference between the quantity of fuel injected and the normal quantity of fuel needed, the resulting quantity being taken to represent the quantity of fuel injected but not burned, comparing said quantity of fuel injected but not burned to a preset threshold value based on the distance driven, deactivating or not the stop-and-start mode operation, according to whether or not said quantity of fuel injected but not burned is greater than the preset threshold value. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification