A control device for an internal combustion engine for a vehicle having: an internal combustion engine; and an electric motor connected to an output shaft of the internal combustion engine and applying torque to the output shaft by use of electric power supplied from storage batteries. The control device automatically stops the internal combustion engine when an automatic stop condition is satisfied. The control device disables automatic stop from being carried out when an automatic stop disabling condition is satisfied. And the control device decreases an output of the internal combustion engine and increases an output of the electric motor when the automatic stop condition of the internal combustion engine is disabled and when the automatic stop condition is satisfied but the automatic stop disabling condition is not satisfied.

Methods and controllers for dynamically altering the phase of a firing sequence during operation of an engine are described. The described methods and controllers are particularly useful in conjunction with dynamic skip fire operation of the engine.

Methods and controllers for dynamically altering the phase of a firing sequence during operation of an engine are described. The described methods and controllers are particularly useful in conjunction with cylinder output level modulation operation of an engine such as dynamic skip fire operation of the engine and/or multi-charge level operation of the engine.

An electric circuit used in a vehicle having an idling stop function of automatically stopping and automatically restarting an engine includes an electric generator, a first electricity storage capable of charging and discharging electric power generated by the electric generator, a second electricity storage connected in parallel to the first electricity storage, capable of charging and discharging the generated electric power, and having high durability against repetitive charge and discharge compared to the first electricity storage, an engine restarter, which is connected to the first electricity storage and the second electricity storage, configured to crank the engine at a time of the automatic restart, and a switch, which is connected between the engine restarter and the first electricity storage, configured to block a flow of current between the engine restarter and the first electricity storage. The switch includes at least a semiconductor switch.

A method includes detecting a diesel engine runaway event in a diesel engine and, in response to detecting the diesel engine runaway event, deactivating all cylinders in the diesel engine such that no combustion occurs in any cylinders of the diesel engine and no cylinders of the diesel engine produce power, wherein deactivating the cylinders of the diesel engine includes mechanically decoupling a camshaft of the diesel engine from inlet valves of the cylinders of the diesel engine, and wherein deactivating cylinders of the diesel engine prevents flow of air from an intake manifold into combustion chambers of the cylinders.

A stop system for an engine of a work machine includes an engine stop control unit and an engine stop control suspension unit. The engine stop control unit, in a case in which there is a stop instruction that instructs to stop the engine of the work machine, performs delayed stop control to delay the stop of the engine until a predetermined condition is established, and then stops the engine. The engine stop control suspension unit, in a case in which there is a cancellation instruction to cancel the stop instruction, suspends the delayed stop control when work equipment of the work machine is in a locked state, and continues to perform the delayed stop control when the work equipment is in an unlocked state.

In a 2H mode of two-wheel drive and a 4H mode of four-wheel drive, a driver does not put much importance on traveling performance on a rough road. Therefore, implementation of both of idling-stop control and neutral control is permitted. Compared with the 4H mode, in a 4HLc mode for limiting differential motions of a center differential gear and a rear differential gear, it can be regarded that the driver puts importance on the traveling performance on the rough road. Therefore, the implementation of the idling-stop control is prohibited and the implementation of the neutral control is permitted. In a 4LLc mode for switching a sub-reduction gear to a low gear side compared with the 4HLc mode, since it can be regarded that the driver puts more importance on the traveling performance on the rough road, both of the implementation of the idling stop control and the implementation of the neutral control are prohibited.

In a 2H mode of two-wheel drive and a 4H mode of four-wheel drive, a driver does not put much importance on traveling performance on a rough road. Therefore, implementation of both of idling-stop control and neutral control is permitted. Compared with the 4H mode, in a 4HLc mode for limiting differential motions of a center differential gear and a rear differential gear, it can be regarded that the driver puts importance on the traveling performance on the rough road. Therefore, the implementation of the idling-stop control is prohibited and the implementation of the neutral control is permitted. In a 4LLc mode for switching a sub-reduction gear to a low gear side compared with the 4HLc mode, since it can be regarded that the driver puts more importance on the traveling performance on the rough road, both of the implementation of the idling stop control and the implementation of the neutral control are prohibited.

The power supply determining part determines whether there is a power supplied from outside of the vehicle to the battery at start-up of the engine. The alarming part alarms to prompt a driver to manually operate the automatic stop control part when it is determined that there is a power supplied from the outside by the power supply determining part.

The power supply determining part determines whether there is a power supplied from outside of the vehicle to the battery at start-up of the engine. The alarming part alarms to prompt a driver to manually operate the automatic stop control part when it is determined that there is a power supplied from the outside by the power supply determining part.