Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operation may be adjusted in response to operating the hybrid vehicle in a four wheel drivel low gear range. The approaches may improve vehicle drivability and reduce driveline degradation.

Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operation may be adjusted in response to operating the hybrid vehicle in a four wheel drivel low gear range. The approaches may improve vehicle drivability and reduce driveline degradation.

A cooling control device includes a coolant pump being driven at an internal combustion engine to supply a coolant of the internal combustion engine, a heat exchanger being provided at each of plural flow paths that are formed in parallel to one another, a flow amount control valve controlling the coolant being supplied to the plural flow paths, and a control portion controlling the flow amount control valve. The control portion performs a control in a first supply mode in which the coolant is supplied to a first flow path, and a second supply mode in which the coolant is supplied to a second flow path during a supply of the coolant to the first flow path. The control portion operates a switching control shifting to the second supply mode temporarily in a state of being in the first supply mode, and returning to the first supply mode.

A cooling control device includes a coolant pump being driven at an internal combustion engine to supply a coolant of the internal combustion engine, a heat exchanger being provided at each of plural flow paths that are formed in parallel to one another, a flow amount control valve controlling the coolant being supplied to the plural flow paths, and a control portion controlling the flow amount control valve. The control portion performs a control in a first supply mode in which the coolant is supplied to a first flow path, and a second supply mode in which the coolant is supplied to a second flow path during a supply of the coolant to the first flow path. The control portion operates a switching control shifting to the second supply mode temporarily in a state of being in the first supply mode, and returning to the first supply mode.

In a case where a control device receives a stop signal instructing stopping of an engine and the control device determines that the engine temperature is lower than a predetermined temperature based on a signal from a timer or based on a signal from a cooling water temperature sensor, an operation control is maintained until the control device determines that the engine temperature is the predetermined temperature or higher. This way, an engine is provided which is capable of restraining generation of blowby condensate water without stopping a cooling water pump during the operation of the engine.

In a case where a control device receives a stop signal instructing stopping of an engine and the control device determines that the engine temperature is lower than a predetermined temperature based on a signal from a timer or based on a signal from a cooling water temperature sensor, an operation control is maintained until the control device determines that the engine temperature is the predetermined temperature or higher. This way, an engine is provided which is capable of restraining generation of blowby condensate water without stopping a cooling water pump during the operation of the engine.

The cooling device according to the present invention includes an electric water pump for circulating cooling water through an internal combustion engine of a vehicle, and controls the discharge flow rate of the electric water pump as follows. Until the cooling water temperature. TW reaches a warm-up completion determination temperature, the cooling device increases the discharge flow rate along with an increase of the cooling water temperature TW. After the cooling water temperature TW reaches the warm-up completion determination temperature, the cooling device controls the discharge flow rate so as to bring the combustion chamber wall temperature TCYL toward a target temperature. Thereby, the cooling device can warm up the internal combustion engine more efficiently, and improve the combustion performance of the internal combustion engine after the completion of warm-up.

The cooling device according to the present invention includes an electric water pump for circulating cooling water through an internal combustion engine of a vehicle, and controls the discharge flow rate of the electric water pump as follows. Until the cooling water temperature. TW reaches a warm-up completion determination temperature, the cooling device increases the discharge flow rate along with an increase of the cooling water temperature TW. After the cooling water temperature TW reaches the warm-up completion determination temperature, the cooling device controls the discharge flow rate so as to bring the combustion chamber wall temperature TCYL toward a target temperature. Thereby, the cooling device can warm up the internal combustion engine more efficiently, and improve the combustion performance of the internal combustion engine after the completion of warm-up.

The present teachings provide for a flow restrictor for a coolant line of an internal combustion engine coolant system. The flow restrictor can include a restrictor element and a biasing member. The restrictor element can include a restrictor plate and a tab non-rotatably coupled at an angle. The biasing member can rotationally bias the restricting element to a first position where the restricting plate is substantially parallel to the flow of fluid. The tab can be configured to create a torque on the restricting element to overcome the biasing member and rotate the restricting plate to block a portion of the fluid flow path when the flow exceeds a predetermined flow rate.

A thermal management system for a vehicle may be selectively controlled to supply heat from any one of a plurality of different heat sources, to any one of a plurality of different heat sinks. The heat sources may include: an internal combustion engine, a cylinder head, an exhaust gas heat recovery system, an exhaust gas recirculation system, or a turbocharging system. The heat sinks may include: the internal combustion engine, the cylinder heat, an engine oil cooler, a transmission oil cooler, and a heating core. Each of an engine oil cooler control valve, a transmission oil cooler control valve, a heating core control valve, an engine block control valve, a cylinder head control valve, a bypass control valve, and a heat transfer control valve are controlled to effectuate a desired operating mode for the thermal management system.