Abstract: A cylinder head cover for an internal combustion engine includes a density changed portion provided to extend in a thickness direction of the cylinder head cover. The density changed portion divides the cylinder head cover into a plurality of parts. The density changed portion has a density different from a density of a portion of the cylinder head cover other than the density changed portion.

Abstract: A cruise control apparatus is provided with: a controlling device configured to start a determination period, which is a period for determining whether or not to continue the intermittent operation mode, on condition that a change amount of the accelerator opening degree exceeds a predetermined change amount, during implementation of the intermittent operation mode, and configured to set an accelerator following period, which is a period for allowing the driver's accelerator operation to follow torque of the vehicle, after an end of the determination period, if it is determined that the intermittent operation mode is to be continued according to a change width of the accelerator opening degree obtained in the determination period.

Abstract: A cooling water control apparatus is configured to control a cooling apparatus, wherein the cooling apparatus includes: a first pipe in which the cooling water passes through an engine; a second pipe in which the cooling water does not pass through the engine; a valve; and an exhaust heat recovery equipment, the cooling water control apparatus includes: a determining device for performing a determination operation to determine whether or not the valve has failure on the basis of difference between first water temperature and second water temperature; and a controlling device for controlling the cooling apparatus such that transferred heat amount in the exhaust heat recovery equipment decreases with increase of load of the engine or the transferred heat amount is maintained regardless of largeness of the load of the engine, when the determining device performs the determination operation.

Abstract: An internal combustion engine includes a manifold channel. With respect to a longest cylinder that is a cylinder whose flow channel length from the cylinder to a collective portion is the longest among three cylinders, the manifold channel is provided with a hollow layer that covers a part of a channel wall in the flow channel direction of a branch channel connected to the longest cylinder. With respect to a shortest cylinder that is a cylinder whose flow channel length from the cylinder to the collective portion are the shortest, the manifold channel is not provided with a hollow layer that covers a channel wall of a branch channel connected to the shortest cylinder. A wall that forms the hollow layer for the longest cylinder is formed integrally and continuously with the same material as a channel wall of the branch channel connected to the longest cylinder.

Abstract: An internal-combustion engine has a combustion chamber surrounded by a cylinder head, a cylinder liner, and a piston. The cylinder head has a valve seat adjacent to the combustion chamber. When viewed from a direction parallel to a central axis of a cylindrical shape of the cylinder liner, the valve seat is arranged at an outer side of a central region of the combustion chamber, the central region including the central axis. The valve seat internally has a channel for a cooling medium. Regarding a cross-sectional area of the channel in a plane perpendicular to an extending direction of the channel, there are a first position of a first cross-sectional area and a second position of a second cross-sectional area larger than the first cross-sectional area. The second position is closer to the central region than the first position is.

Abstract: A cylinder block is provided with a cylinder bore wall section configured to support a piston which reciprocates in a cylinder bore. The cylinder bore wall section includes a hollow portion at a location of the cylinder bore wall section on the side away from a cylinder head in the cylinder axial direction. The width of the hollow portion in the cylinder radial direction is greater on the side away from the cylinder head in the cylinder axial direction than the side closer to the cylinder head.

Abstract: A cylinder block of an internal combustion engine includes a cylinder bore wall that holds a piston so as to allow the piston to reciprocate. In at least one part of the cylinder bore wall in a cylinder axial direction, the density of a layer located farther from a cylinder head is lower than the density of a layer located closer to the cylinder head in the cylinder axial direction.

Abstract: A cooling water control apparatus is a cooling water control apparatus for controlling a cooling apparatus having a first pipe which circulates cooling water through an engine; a second pipe which circulates the cooling water not through the engine; and a switching valve whose state is changed between opened and closed states, and has: a detecting device which detects first temperature of the cooling water in a pipe portion of the first pipe between the engine and the switching valve; and a determining device which determines that there is failure of the switching valve whose state is the closed state, if required period from the output of the command for changing the state of the switching valve from the opened state to the closed state until the first temperature reaches predetermined temperature is larger than predetermined target period.

Abstract: A cooling water control apparatus controls a cooling apparatus having first pipe which circulates cooling water through an engine; second pipe which circulates cooling water not through the engine; a switching valve whose state is changed between opened and closed states; and a supplying mechanism which supplies cooling water, and has a determining device which determines whether there is failure of the switching valve based on difference between first temperature of cooling water in first pipe and second temperature of cooling water in second pipe after the command for changing the state of the switching valve from closed state to opened state is outputted; and a controlling device which controls the supplying mechanism to supply cooling water even after the engine stops, when the engine stops while the determining device determines whether there is failure of the switching valve.

Abstract: A coolant control device includes: first control means for, at warm-up of an internal combustion engine, circulating coolant in a first passage bypassing the engine and stopping coolant circulation in the second passage passing through the engine; second control means for, at engine warm-up and when the quantity of heat required by a heater core is smaller than or equal to a predetermined threshold, circulating coolant in the first passage while adjusting the flow rate of coolant circulating in the first passage and stopping coolant circulation in the second passage; and third control means for, at engine warm-up and when the required quantity of heat exceeds the predetermined threshold, circulating coolant in the first passage without decreasing the flow rate of coolant circulating in the first passage and circulating coolant in the second passage while adjusting the flow rate of coolant circulating in the second passage.

Abstract: A vehicle control device operates an electric generator by an internal combustion engine and can intermittently drive an electric motor. The vehicle control device includes an electric storage unit and a control unit. The electric storage unit supplies electric power to the electric motor and can be charged by regenerative electric power from the electric generator. The control unit stops the intermittent driving mode provided that the vehicle speed is equal to or smaller than a predetermined speed and a status amount corresponding to an electric storage state of the electric storage unit is equal to or smaller than a predetermined value.

Abstract: A control device for an engine, the control device includes an ECU. The ECU is configured to: (i) perform switching between a first/second operation, the first operation is a first operation and the second operation is an operation with cylinder deactivation; (ii) determine operation points where vibration based on the operational state of the engine is equal to or lower than a predetermined value when performing the first/second operation; (iii) determine which one of a thermal efficiency in the operation point in case of performing the first operation and a thermal efficiency in the operation point in case of performing the second operation is higher; and (iv) control the operational state of the engine so as to operate in the operation point where the thermal efficiency is determined to be higher.

Abstract: A heat management system for vehicles comprises: a first circulation circuit which cools an engine body of an internal combustion engine and includes a first pump for pressure-feeding a refrigerant; a second circulation circuit including an exhaust heat recovery apparatus for recovering exhaust heat from the internal combustion engine, a heater core used for air-conditioning of a vehicle, and a second pump for pressure-feeding the refrigerant; communication passages allowing the first circulation circuit to communicate with the second circulation circuit; and an on-off valve provided in the first communication passage, and switching between the communication between the first circulation circuit and the second circulation circuit and the preventing of communication therebetween, wherein the on-off valve is controlled such that the refrigerant temperature of the first circulation circuit is higher than that of the second circulation circuit.

Abstract: There is provided a control system of a chemical heat accumulator which enables to facilitate small-sizing of the chemical heat accumulator by carrying out heat release and heat accumulation according to a degree of priority by appropriately selecting a location of carrying out the heat release and heat accumulation on priority basis. A chemical heat accumulator includes a valve mechanism which makes a plurality of reactors communicate separately with a reservoir, and cuts off the plurality of reactors from the reservoir.

Abstract: A cooling water control apparatus has a setting device which sets a target heat amount line such that a condition where a transferred heat amount which is transferred to a heater core is equal to a required heat amount which is required by the heater core is satisfied at a desired time point at which the transferred heat amount starts to be actually used, the target heat amount line representing a successive target value of the transferred heat amount during a period until the desired time point; and a first controlling device which makes a cooling water circulate in a first pipe, stops the circulation of the cooling water in a second pipe and adjusts an output of an engine such that the transferred heat amount follows the target heat amount line.

Abstract: A control device for an internal combustion engine is provided. The internal combustion engine is configured to perform switching between an all-cylinder operation and a partial cylinder operation. The internal combustion engine includes a temperature regulator. The temperature regulator is configured to separately regulate the temperature of an operating cylinder and the temperature of a paused cylinder. The operating cylinder is a cylinder that operates during the partial cylinder operation. The paused cylinder is a cylinder that is paused during the partial cylinder operation. The control device includes an electronic control unit. The electronic control unit is configured to (i) calculate a temperature difference between the operating cylinder and the paused cylinder during the partial cylinder operation, and (ii) control the temperature regulator such that the temperature difference becomes equal to or smaller than a predetermined threshold.

Abstract: A cooling apparatus comprises a first cooling conduit branching off from a downstream side connection conduit to cool the cylinder head, a second cooling conduit branching off from the downstream side connection conduit, is provided in parallel with the first cooling conduit, an intermediate cooling conduit being connected to the first and second cooling conduits, is provided with an EGR cooler, a third cooling conduit running from a connection point of the intermediate cooling conduit and the first cooling conduit to an upstream side connection conduit, a fourth cooling conduit running from a connection point of the intermediate cooling conduit and the second cooling conduit to the upstream side connection conduit, and a changeover valve for adjusting the flow resistance of the second cooling conduit. And the direction of coolant flow in the intermediate cooling conduit is changed over by operating the changeover valve.

Abstract: A control device for an engine, the control device includes an ECU. The ECU is configured to: (i) perform switching between a first/second operation, the first operation is a first operation and the second operation is an operation with cylinder deactivation; (ii) determine operation points where vibration based on the operational state of the engine is equal to or lower than a predetermined value when performing the first/second operation; (iii) determine which one of a thermal efficiency in the operation point in case of performing the first operation and a thermal efficiency in the operation point in case of performing the second operation is higher; and (iv) control the operational state of the engine so as to operate in the operation point where the thermal efficiency is determined to be higher.

Abstract: A vehicle control apparatus controls a vehicle including an internal combustion engine, a power generation unit that converts at least one of an engine output of the internal combustion engine and a kinetic energy of the vehicle into electric power, and a power storage unit that stores the electric power. The vehicle control apparatus includes: a first control unit configured to control the vehicle to alternate repeatedly between acceleration travel, in which the vehicle accelerates using the engine output, and coasting travel, in which the vehicle coasts without using the engine output, such that a vehicle speed is maintained within a predetermined speed region; and a second control unit configured to control the power generation unit to convert at least one of the engine output and the kinetic energy into electric power during a coasting period in which the vehicle performs the coasting travel.

Abstract: A display device includes: first setting means for setting a first operation amount to be performed by an occupant so as to increase an output in a state in which a vehicle speed is less than a predetermined threshold; second setting means for setting a second operation amount to be performed by the occupant such that an operation state of the vehicle can be shifted to a desired state in which optimal instantaneous fuel consumption is realized, by decreasing the output in a state in which the vehicle speed is equal to or greater than the predetermined threshold; and display means for displaying, on a display unit, at least one of the first operation amount and the second operation amount, and a present operation amount which is an operation amount performed at present by the occupant.