Control apparatus for hybrid vehicle

A control apparatus configured for use in a hybrid vehicle that comprises an engine and an electric motor,

• the engine comprising a supercharger and a blow-by gas treatment device, the blow-by gas treatment device comprising a ventilation line and a fresh air line and being configured to cause blow-by gas to be introduced into an intake system and combusted, the ventilation line allowing a crankcase and a downstream side of the supercharger to communicate with each other and being configured to cause the blow-by gas to flow back to the intake system, the fresh air line allowing an upstream side of the supercharger and the crankcase to communicate with each other and being configured to introduce fresh air,
• the electric motor being coupled to an output shaft of the engine to allow transmission of a torque,
• the control apparatus comprising:
• one or more processors;
• and
• one or more memories storing instructions for causing the one or more processors to:
• control driving of each of the engine and the electric motor;
• and
• cause the electric motor to be in regenerative operation without decreasing an output torque of the engine in one or both of:
• a case where a boost pressure decreases to a predetermined threshold or below, in a situation where an outside air temperature is lower than or equal to a predetermined temperature and where the boost pressure is positive;
• and a case where an accelerator position decreases, in the situation where the outside air temperature is lower than or equal to the predetermined temperature and where the boost pressure is positive.