Internal combustion engine with turbo-charger and knocking control system
First Claim
1. An internal combustion engine comprising:
- an engine body;
an intake line for introducing air into the engine body;
an exhaust line for removing exhaust gas from the engine body;
means for supplying an amount of fuel into the engine so as to provide an air-fuel mixture;
means for calculating said amount of fuel to be supplied, from the supply means to the engine, which is determined in accordance with basic engine operating conditions including engine speed and load;
means for modifying said amount of fuel to be supplied by incorporating an enrichment correction value when the engine conditions are such that the temperature of the exhaust gas is increased;
delay means for delaying said modification for a predetermined period after enrichment is required within a time range where the increase in the temperature of the exhaust gas is small;
detecting means for issuing a signal indicating of a particular condition of the engine where the temperature of the exhaust gas is greatly increased when the enrichment is delayed, said detecting means including;
means for setting a threshold value to the enrichment correction value, andmeans for judging if the actual enrichment correction value is larger than the threshold value for issuing said signal indicating the particular condition, and;
means, responsive to said signal, for cancelling the operation of the delay means when the engine is in said particular condition.
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Accused Products
Abstract
A fuel injection system for an internal combustion engine provided with a turbo-charger and an ignition retard control system responsive to a signal from knocking sensor for controlling knocking. A system is provided for attaining a fuel enrichment correction at a predetermined range of engine conditions for preventing an increase in a temperature of the exhaust gas. The enrichment is delayed for a predetermined period after moving into that range, to obtain a high fuel economy. A system is further provided for cancelling the enrichment delay when the engine is under a particular condition where the exhaust gas temperature is very apt to be increased. Such a condition is detected by an enrichment correction value or ignition retard correction value which is larger than a threshold value.
11 Citations
8 Claims
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1. An internal combustion engine comprising:
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an engine body; an intake line for introducing air into the engine body; an exhaust line for removing exhaust gas from the engine body; means for supplying an amount of fuel into the engine so as to provide an air-fuel mixture; means for calculating said amount of fuel to be supplied, from the supply means to the engine, which is determined in accordance with basic engine operating conditions including engine speed and load; means for modifying said amount of fuel to be supplied by incorporating an enrichment correction value when the engine conditions are such that the temperature of the exhaust gas is increased; delay means for delaying said modification for a predetermined period after enrichment is required within a time range where the increase in the temperature of the exhaust gas is small; detecting means for issuing a signal indicating of a particular condition of the engine where the temperature of the exhaust gas is greatly increased when the enrichment is delayed, said detecting means including; means for setting a threshold value to the enrichment correction value, and means for judging if the actual enrichment correction value is larger than the threshold value for issuing said signal indicating the particular condition, and; means, responsive to said signal, for cancelling the operation of the delay means when the engine is in said particular condition. - View Dependent Claims (2, 3)
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4. An internal combustion engine comprising:
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an engine body; an intake line for introducing air into the engine body; an exhaust line for removing exhaust gas from the engine body; means for supplying an amount of fuel into the engine so as to provide an air-fuel mixture; means for calculating said amount of fuel to be supplied, from the supply means to the engine, which is determined in accordance with basic engine operation conditions including engine speed and load; means for modifying said amount of fuel to be supplied by incorporating an enrichment correction value when the engine conditions are such that the temperature of the exhaust gas is increased; delay means for delaying said modification for a predetermined period after enrichment is required within a time range where the increase in the temperature of the exhaust gas is small; detecting means for issuing a signal indicating of a particular condition of the engine where the temperature of the exhaust gas is greatly increased when the enrichment is delayed, said detecting means including; means for setting a threshold value to the enrichment correction value, and means for judging if the actual enrichment correction value is larger than the threshold value for issuing said signal indicating the particular condition, means, responsive to said signal, for cancelling the operation of the delay means when the engine is in said particular conditions; and a system for retarding an ignition timing in order to control an engine operation condition. - View Dependent Claims (5, 6)
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7. An internal combustion engine comprising:
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an engine body; an intake line for introducing air into the engine body; an exhaust line for removing exhaust gas from the engine body; turbo-charger means for receiving the energy of the exhaust gas for increasing the intake air pressure in the intake line; sensor means for providing a signal indicating knocking condition of the engine; means for controlling an ignition timing in the engine in accordance with a signal from the sensor means for controlling the occurrence of knocking; means for supplying an amount of fuel into the engine so as to provide an air-fuel mixture; means for calculating the basic amount of fuel supplied, from the supplying means, to the engine, which is determined in accordance with the basic engine operating conditions including engine speed and load; means for modifying the basic amount by incorporating an enrichment correction value of the basic amount when the engine conditions are such that the temperature of the exhaust gas is increased; delay means for delaying said modification for a predetermined period after the enrichment is required within a time range where the increase in the temperature of the exhaust gas is small; means for setting a threshold value to the enrichment correction value; means for issuing a signal when the actual ignition timing retard correction value is larger than the threshold value, and; means for cancelling the operation of the delay means when said signal is issued.
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8. An internal combustion engine comprising:
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an engine body; an intake line for introducing air into the engine body; an exhaust line for removing exhaust gas from the engine body; turbo-charger means for receiving the energy of the exhaust gas for increasing the intake air pressure in the intake line; sensor means for providing a signal indicating a knocking condition of the engine; means for controlling an ignition timing in the engine in accordance with a signal from the sensor means for controlling the occurrence of the knocking; means for supplying an amount of fuel into the engine so as to provide an air-fuel mixture; means for calculating the basic amount of fuel supplied, from the supplying means to the engine, which is determined in accordance with the basic engine operating conditions including engine speed and load; means for modifying the basic amount by incorporating an enrichment correction value of the basic amount when the engine conditions are such that the temperature of the exhaust gas is increased; delay means for delaying said modification for a predetermined period after the enrichment is required within a time range that the increase in the temperature of the exhaust gas is small; means for setting a threshold value to the ignition retard value; means for issuing a signal when the actual enrichment correction value is larger than the threshold value, and; means for cancelling the operation of the delay means when said signal is issued.
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Specification