Control apparatus of engine

1. A control apparatus of an engine having an exhaust bypass passage for bypassing a turbine of a supercharger, a waste gate valve for opening and closing the exhaust bypass passage, a starting switch that outputs an engine start-up request when operated by a driver, and a temperature sensor that detects a temperature of the engine, the control apparatus including a processing device and a storage device storing a program that executes the processing device to:

control an opening/closing action of the waste gate valve via an opening/closing control device of the control apparatus; and

start-up the engine in accordance with the engine start-up request via a start-up control device of the control apparatus;

wherein the opening/closing control device controls the opening closing action of the waste gate valve in accordance with the detected temperature of the engine before a start-up procedure for the engine by the start-up control device is started;

wherein if the detected temperature of the engine is equal to or lower than a first predetermined temperature, the opening/closing control device controls the waste gate valve in a valve opening direction; and

wherein the opening/closing control device controls the opening/closing action of the waste gate valve in accordance with the detected temperature of the engine after the start-up procedure for the engine is completed;

wherein if the detected temperature of the engine is equal to or lower than a second predetermined temperature, the opening/closing control device controls the waste gate valve in a valve closing direction; and

wherein the first predetermined temperature is set to be lower than the second predetermined temperature;

wherein if the detected temperature of the engine is equal to or lower than the second predetermined temperature after the start-up procedure for the engine is completed, the opening/closing control device maintains the waste gate valve in a closed state until the opening/closing control device determines that the detected temperature of the engine becomes equal to or higher than a third predetermined temperature;

wherein the third predetermined temperature is higher than the second predetermined temperature and lower than a warm-up completion temperature of the engine.

2. The control apparatus of an engine according to claim 1 , wherein

the engine has an intake bypass valve for opening and closing an intake bypass passage for bypassing a compressor of the supercharger; and

the opening/closing control device controls an opening/closing action of the intake bypass valve in a valve opening direction as well as the opening/closing action of the waste gate valve in the valve opening direction.

3. The control apparatus of an engine according to claim 2 , wherein

the waste gate valve has an actuator which operates to close the wastegate valve via an electric power supplied from a battery, and operates to open the wastegate valve upon a cutoff of the electric power supplied from the battery; and

wherein the start-up control device actuates an electric motor for cranking the engine via the electric power supplied from the battery.

4. The control apparatus of an engine according to claim 1 , wherein

the waste gate valve has an actuator which operates to close the wastegate valve via/based on/with respect to an electric power supplied from a battery, and operates to open the wastegate valve upon a cutoff of the electric power supplied from the battery; and

wherein the start-up control device actuates an electric motor for cranking the engine via the electric power supplied from the battery.

5. A control apparatus of an engine having an exhaust bypass passage for bypassing a turbine of a supercharger, a waste gate valve for opening and closing the exhaust bypass passage, a starting switch that outputs an engine start-up request when operated by a driver, and a temperature sensor that detects a temperature of the engine, the control apparatus including a processing device and a storage device storing a program that executes the processing device to:

control an opening/closing action of the waste gate valve via an opening/closing control device of the control apparatus; and

start-up the engine in accordance with the engine start-up request via a start-up control device of the control apparatus;

wherein the opening/closing control device controls the opening/closing action of the waste gate valve in accordance with the detected temperature of the engine before a start-up procedure for the engine by the start-up control device is started;

wherein if the detected temperature of the engine is equal to or lower than a first predetermined temperature, the opening/closing control device controls the waste gate valve in a valve opening direction;

wherein the first predetermined temperature is set to be lower than the second predetermined temperature;

wherein the engine has an intake bypass valve for opening and closing an intake bypass passage for bypassing a compressor of the super charger; and

wherein the opening/closing control device controls an opening/closing action of the intake bypass valve in a valve opening direction as well as the opening/closing action of the waste gate valve in the valve opening direction.

6. The control apparatus of an engine according to claim 5 , wherein

the waste gate valve has an actuator which operates to close the wastegate valve via an electric power supplied from a battery, and operates to open the wastegate valve upon a cutoff of the electric power supplied from the battery; and

wherein the start-up control device actuates an electric motor for cranking the engine via the electric power supplied from the battery.

7. A control apparatus of an engine having an exhaust bypass passage for bypassing a turbine of a supercharger, a waste gate valve for opening and closing the exhaust bypass passage, a starting switch that outputs an engine start-up request when operated by a driver, and a temperature sensor that detects a temperature of the engine, the control apparatus including a processing device and a storage device storing a program that executes the processing device to:

control an opening/closing action of the waste gate valve via an opening/closing control device of the control apparatus; and

start-up the engine in accordance with the engine start-up request via a start-up control device of the control apparatus;

wherein the opening/closing control device controls the opening/closing action of the waste gate valve in accordance with the detected temperature of the engine before a start-up procedure for the engine by the start-up control device is started;

wherein if the detected temperature of the engine is equal to or lower than a first predetermined temperature, the opening/closing control device controls the waste gate valve in a valve opening direction;

wherein the waste gate valve has an actuator which operates to close the wastegate valve via/based on/with respect to an electric power supplied from a battery, and operates to open the wastegate valve upon a cutoff of the electric power supplied from the battery; and

wherein the start-up control device actuates an electric motor for cranking the engine via the electric power supplied from the battery.