Subaru Corporation

Tomoyuki Kaneda

Konosuke Muramatsu

An engine control device controls an engine. The control device includes a controller. The controller is configured to open the air bypass valve of the engine and close the waste gate valve of the engine when a first condition is satisfied, and thereafter determine that an execution condition of a boost pressure increase control is satisfied when a second condition is satisfied. The air-bypass valve disposed on an air-bypass passage that communicates between an upstream side and a downstream side of a compressor in an intake passage. The waste gate valve disposed on a waste gate passage that communicates between an upstream side and a downstream side of the turbine in an exhaust passage. The first condition represents a turbine pre-rotation start request, and the second condition represents a boost pressure increase request.

Engine control device

A position sensor malfunction determination apparatus includes a determination unit and a controller. The determination unit is configured to perform a determination relating to electricity supply failure in a position sensor. The controller is configured to perform a fail-safe control. The determination unit is configured to determine whether each of conditions (A) and (B) is established, in a preliminarily determination before occurrence of the electricity supply failure in the position sensor is finally determined. The determination unit is configured to determine that the position sensor has a probability of the electricity supply failure when both the conditions (A) and (B) are determined to be established in the preliminarily determination. The controller is configured to execute, when the determination unit determines that the position sensor has the probability of the electricity supply failure, the fail-safe control before the occurrence of the electricity supply failure in the position sensor is finally determined.

Position sensor malfunction determination apparatus

An engine control device controls an engine. The engine includes a turbocharger, a waste gate valve, and a throttle. In a predetermined low load region, the engine control device performs first control in which the waste gate valve is opened at a predetermined opening degree or more and output adjustment is performed by an opening degree of the throttle. In a predetermined high load region, the engine control device performs second control in which the throttle is opened at a predetermined opening degree or more and output adjustment is performed by an opening degree of the waste gate valve. When a torque limiting request is generated in the high load region, the engine control device performs third control in which the waste gate valve is substantially fully closed and output adjustment is performed by the opening degree of the throttle.

Growing community of inventors

Tokyo, Japan

Tomoyuki Kaneda