Control apparatus of internal combustion engine

A control apparatus of an internal combustion engine comprising:

• a brake booster for increasing a brake force of a brake by using a negative pressure of an intake pipe employed in the internal combustion engine;
• and
• an ignition retarding control means for executing ignition retarding control to retard an ignition timing at a cold start in order to promote an operation to heat a catalyst for cleaning exhausted gas,
• wherein the ignition retarding control means starts the ignition retarding control after a predetermined time lapses since a start.

A control apparatus of an internal combustion engine comprising:

• a brake booster for increasing a brake force of a brake by using a negative pressure of an intake pipe employed in the internal combustion engine;
• and
• an ignition retarding control means for executing ignition retarding control to retard an ignition timing at a cold start in order to promote an operation to heat a catalyst for cleaning exhausted gas,
• the control apparatus further comprising a negative pressure recognizing means for recognizing a negative pressure of the intake pipe or a negative pressure of the brake booster,
• wherein the ignition retarding control means reduces a retardation speed of the ignition timing till a negative pressure recognized by the negative pressure recognizing means decreases to a value equal to or lower than a predetermined value and, thereafter, increases the retardation speed.

A control apparatus of an internal combustion engine comprising:

• a brake booster for increasing a brake force of a brake by using a negative pressure of an intake pipe employed in the internal combustion engine;
• and
• an ignition retarding control means for executing ignition retarding control to retard an ignition timing at a cold start in order to promote an operation to heat a catalyst for cleaning exhausted gas,
• wherein the ignition retarding control means reduces a retardation speed of the ignition timing till a predetermined time lapses since a start and, thereafter, increases the retardation speed.

A control apparatus of an internal combustion engine comprising:

• a brake booster for increasing a brake force of a brake by using a negative pressure of an intake pipe employed in the internal combustion engine;
• and
• an ignition retarding control means for executing ignition retarding control to retard an ignition timing at a cold start in order to promote an operation to heat a catalyst for cleaning exhausted gas,
• the control apparatus further comprising a negative pressure recognizing means for recognizing a negative pressure of the intake pipe or a negative pressure of the brake booster,
• wherein the ignition retarding control means sets the ignition timing's retardation quantity and/or retardation speed on the basis of a negative pressure recognized by the negative pressure recognizing means.

A control apparatus of an internal combustion engine comprising:

• a brake booster for increasing a brake force of a brake by using a negative pressure of an intake pipe employed in the internal combustion engine;
• and
• an ignition retarding control means for executing ignition retarding control to retard an ignition timing at a cold start in order to promote an operation to heat a catalyst for cleaning exhausted gas,
• wherein the ignition retarding control means sets the ignition timing's retardation quantity and/or retardation speed on the basis of a time lapsing since a start in the course of the ignition retarding control.

A control apparatus of an internal combustion engine comprising:

• a brake booster for increasing a brake force of a brake by using a negative pressure of an intake pipe employed in the internal combustion engine;
• and
• an ignition retarding control means for executing ignition retarding control to retard an ignition timing at a cold start in order to promote an operation to heat a catalyst for cleaning exhausted gas,
• the control apparatus comprising:
• a negative pressure recognizing means for recognizing a negative pressure of the intake pipe or a negative pressure of the brake booster;
• and
• a retardation quantity control means for changing a control range of a retardation quantity of the ignition timing in accordance with a negative pressure recognized by the negative pressure recognizing means and/or a load borne by the internal combustion engine.

A control apparatus of an internal combustion engine comprising:

• a brake booster for increasing a brake force of a brake by using a negative pressure of an intake pipe employed in the internal combustion engine;
• and
• an ignition retarding control means for executing ignition retarding control to retard an ignition timing at a cold start in order to promote an operation to heat a catalyst for cleaning exhausted gas,
• the control apparatus further comprising a negative pressure recognizing means for recognizing a negative pressure of the intake pipe or a negative pressure of the brake booster,
• wherein the ignition retarding control means further retards the ignition timing if a predetermined time has lapsed since a start, the internal combustion engine is in an idle operation state and a negative pressure recognized by the negative pressure recognizing means is equal to or lower than a predetermined value.

A valve timing control apparatus of an internal combustion engine comprising:

• a target revolution speed setting means for setting a target revolution speed of the internal combustion engine;
• an intake airflow control means, which is used for controlling a revolution speed of the internal combustion engine by setting a throttle valve at a position on an open side to increase an intake airflow when the revolution speed decreases so that the revolution speed is restored to the target revolution speed;
• a catalyst converter provided on an exhaust pipe;
• an ignition timing control means for controlling an ignition timing in accordance with an operating state of the internal combustion engine;
• and
• a variable intake valve timing mechanism for variably setting an intake valve's position relative to a crank shaft of the internal combustion engine,
• the valve timing control apparatus used for controlling a closing position of the intake valve on the basis a result of processing carried out on the closing position of the intake valve in accordance with an operating condition of the internal combustion engine,
• wherein:
• the ignition timing control means has a means for retarding the ignition timing behind an ignition timing set on the basis of a normal operating condition in order to raise the temperature of the catalyst converter at an early time at a cold start of the internal combustion engine;
• and
• the valve timing control apparatus further has a first advancing control means, which is used for advancing the closing position of the intake valve on the basis of operating status of a brake when the closing position of the intake valve is retarded behind a bottom dead center.