Abstract: A high-pressure fuel pump and a protector are coupled to an outer side of an engine body of an internal combustion engine. A wall plate surrounds the high-pressure fuel pump to protect the high-pressure fuel pump. A cover of the high-pressure fuel pump has a flange. The engine body has a mounting surface. The bottom plate and the flange are fastened to the mounting surface by a bolt with the bottom plate held between the flange and the mounting surface.

Abstract: A protector protects a high-pressure fuel pump of an internal combustion engine. The protector and the high-pressure fuel pump are fastened to an engine body by a bolt inserted through a metal collar. The protector further includes an elastic insulating layer located between the collar and a carbon fiber reinforced plastic portion. The collar is embedded in the carbon fiber reinforced plastic portion with the insulating layer compressed.

Abstract: A fuel pipe includes a tubular header pipe and a socket coupled to the header pipe and supplied with fuel from the header pipe. The header pipe and the socket form a joining portion therebetween. The joining portion is shaped to be elongated in a first direction. The joining portion includes a communication hole that connects an inner region of the header pipe and an inner region of the socket. The communication hole is an elongated hole elongated in the first direction.

Abstract: A controller alternately repeats a desorption process of desorbing sulfur compound deposited on an NSR catalyst by supplying fuel from a direct injection valve to exhaust gas, and a pausing process of pausing fuel supply from the injection valve to the exhaust gas. The controller executes a cooling fuel addition for adding engine fuel from the addition valve of the exhaust passage to cool the addition valve during execution of the pausing process, and prohibit the cooling fuel addition during execution of the desorption process. The controller calculates a target temperature of the addition valve at the time of start of the desorption process such that the temperature of the addition valve during execution of the desorption process does not exceed an allowable upper limit temperature and calculates the addition amount at the time of cooling fuel addition.

Abstract: A protective structure for a fuel pump includes a protector including a connecting wall, a first protective wall, and a second protective wall. The first protective wall and the second protective wall are disposed outside the fuel pump assembled to an internal combustion engine. A standing surface of the second protective wall on a side opposite to a second base end surface in a standing direction of the second protective wall includes a curved surface that is concave on the second base end surface side and that becomes closer to the second base end surface side as the curved surface becomes farther from the first protective wall.

Abstract: A controller alternately repeats a desorption process of desorbing sulfur compound deposited on an NSR catalyst by supplying fuel from a direct injection valve to exhaust gas, and a pausing process of pausing fuel supply from the injection valve to the exhaust gas. The controller executes a cooling fuel addition for adding engine fuel from the addition valve of the exhaust passage to cool the addition valve during execution of the pausing process, and prohibit the cooling fuel addition during execution of the desorption process. The controller calculates a target temperature of the addition valve at the time of start of the desorption process such that the temperature of the addition valve during execution of the desorption process does not exceed an allowable upper limit temperature and calculates the addition amount at the time of cooling fuel addition.

Abstract: A aqueous urea solution supply device for an engine is provided with a tank that stores aqueous urea solution, a valve configured to add the aqueous urea solution to exhaust gas, and a passage configured to supply the aqueous urea solution in the tank to the valve. When a pressure of the aqueous urea solution supplied to the valve is equal to or lower than a predetermined pressure and the amount of the aqueous urea solution in the tank is equal to or smaller than a predetermined threshold, an electronic control unit determines that the aqueous urea solution in an amount required for cooling of the valve cannot be supplied from the tank to the valve and executes a return control for returning the aqueous urea solution in the valve to the tank.

Abstract: A protective structure for a fuel pump includes a protector including a connecting wall, a first protective wall, and a second protective wall. The first protective wall and the second protective wall are disposed outside the fuel pump assembled to an internal combustion engine. A standing surface of the second protective wall on a side opposite to a second base end surface in a standing direction of the second protective wall includes a curved surface that is concave on the second base end surface side and that becomes closer to the second base end surface side as the curved surface becomes farther from the first protective wall.

Abstract: A heat insulator includes a first covering part and a second covering part. The first covering part is configured to cover a bent part formed in an exhaust pipe of an internal combustion engine. The first covering part has a plurality of slits extending in a circumferential direction of the exhaust pipe. The plurality of slits are arranged with a given space from each other in a direction in which the exhaust pipe extends such that a plate part between slits is present between the plurality of slits. The second covering part covers the other part of the exhaust pipe than the bent part. At least a part of the second covering part is bonded to the exhaust pipe.

Abstract: An exhaust gas control system of an internal combustion engine includes a urea water tank, a heater, a purifying device, a notification device, and a controller. The controller is configured to determine whether frozen urea water is left or not. The controller is configured to determine whether liquid urea water capable of being pumped out is not left or not. The controller is configured to estimate a suppliable amount of the urea water to the urea water tank in response to a state where the frozen urea water is left, and the controller configured to control the notification device so as to give a notification for prompting a supply of the suppliable amount of the urea water to the urea water tank in response to a state where liquid urea water capable of being pumped out is not left.

Abstract: A aqueous urea solution supply device for an engine is provided with a tank that stores aqueous urea solution, a valve configured to add the aqueous urea solution to exhaust gas, and a passage configured to supply the aqueous urea solution in the tank to the valve. When a pressure of the aqueous urea solution supplied to the valve is equal to or lower than a predetermined pressure and the amount of the aqueous urea solution in the tank is equal to or smaller than a predetermined threshold, an electronic control unit determines that the aqueous urea solution in an amount required for cooling of the valve cannot be supplied from the tank to the valve and executes a return control for returning the aqueous urea solution in the valve to the tank.

Abstract: A heat insulator includes a first covering part and a second covering part. The first covering part is configured to cover a bent part formed in an exhaust pipe of an internal combustion engine. The first covering part has a plurality of slits extending in a circumferential direction of the exhaust pipe. The plurality of slits are arranged with a given space from each other in a direction in which the exhaust pipe extends such that a plate part between slits is present between the plurality of slits. The second covering part covers the other part of the exhaust pipe than the bent part. At least a part of the second covering part is bonded to the exhaust pipe.

Abstract: An exhaust gas control system of an internal combustion engine includes a urea water tank, a heater, a purifying device, a notification device, and a controller. The controller is configured to determine whether frozen urea water is left or not. The controller is configured to determine whether liquid urea water capable of being pumped out is not left or not. The controller is configured to estimate a suppliable amount of the urea water to the urea water tank in response to a state where the frozen urea water is left, and the controller configured to control the notification device so as to give a notification for prompting a supply of the suppliable amount of the urea water to the urea water tank in response to a state where liquid urea water capable of being pumped out is not left.

Abstract: A mixing device includes: a cylindrical portion having a blade provided inside thereof for mixing exhaust gas that flows inside of an exhaust pipe of an internal combustion engine, with an additive sprayed into the exhaust pipe by an adding valve; a flange having an insertion hole, into which the cylindrical portion is inserted, and extending outward in a radial direction of the cylindrical portion from an outer peripheral surface of the cylindrical portion; and a plurality of supporting portions that are provided on the flange and that support the cylindrical portion, wherein each of the supporting portions includes an extending piece that extends in a circumferential direction of the cylindrical portion from a base end portion connected to the flange.

Abstract: A mixing device includes: a cylindrical portion having a blade provided inside thereof for mixing exhaust gas that flows inside of an exhaust pipe of an internal combustion engine, with an additive sprayed into the exhaust pipe by an adding valve; a flange having an insertion hole, into which the cylindrical portion is inserted, and extending outward in a radial direction of the cylindrical portion from an outer peripheral surface of the cylindrical portion; and a plurality of supporting portions that are provided on the flange and that support the cylindrical portion, wherein each of the supporting portions includes an extending piece that extends in a circumferential direction of the cylindrical portion from a base end portion connected to the flange.

Abstract: Fuel pipes guide fuel from a fuel tank provided in a rear area of the vehicle to a low-pressure fuel supply system and a high-pressure fuel supply system, respectively, for injecting the fuel to an engine provided in a front area of the vehicle. A branch point between the fuel pipes is arranged in the vicinity of the fuel tank to secure a long pipe length between the low-pressure fuel supply system and the high-pressure fuel supply system. This can suppress variation in fuel pressure at the low-pressure fuel supply system attributable to the fuel that is discharged from the high-pressure fuel pump within the high-pressure fuel supply system back to the fuel pipe.

Abstract: A piston top surface (23) has a depression. A center region (28A) is formed at the center of the depression to secure the diameter of a center tumble flow to be large. A side region (28B) is formed on both sides of the piston top surface to generate a side tumble flow that is not influenced by a cylinder bore inner wall and has a flow line generally parallel to that of the center tumble flow.

Abstract: A piston top surface (23) has a depression. A center region (28A) is formed at the center of the depression to secure the diameter of a center tumble flow to be large. A side region (28B) is formed on both sides of the piston top surface to generate a side tumble flow that is not influenced by a cylinder bore inner wall and has a flow line generally parallel to that of the center tumble flow.

Abstract: An intake system for an internal combustion engine includes: an intake passage (50) through which the intake air is introduced into a combustion chamber (40); an intake manifold (100) that is attached to a cylinder head (30) and forms a part of the intake passage (50); an intake air control valve (200) that reduces the flow passage area of at least a part of the intake passage (50); a valve shaft (300) that supports one end portion (210) of the intake air control valve (200) in a manner such that the intake air control valve (200) is allowed to pivot about the valve shaft (300); and a guide rib (400) that protrudes from the intake manifold (100) toward the one end portion (210), and that minimizes the gap between the one end portion (210) and a portion of the wall surface of the intake passage (50), which is close to the valve shaft (300).

Abstract: Leakage of a combustion gas is prevented by installing a seal ring in an annular groove provided in the outer peripheral surface of a fuel injection valve. Further, a combustion gas leaked from the seal ring is sealed in by providing a seal washer more on the rear end side of the fuel injection valve than the seal ring. Thus a combustion gas seal for an injection valve is provided, and the combustion gas seal is capable of exhibiting excellent sealing ability for a long term with a simple structure.