Abstract: A trailer length estimation device for estimating, in a vehicle including a tractor and a trailer connected to the tractor by a connecting device, a trailer length from the connecting device to the wheels of the trailer includes: an acquisition unit that acquires a turning angle of a wheel of the tractor and a connection angle of the trailer with respect to the tractor, the turning angle being detected by a turning angle detector, and the connection angle being detected by a connection angle detector; and a derivation unit that derives the trailer length based on the acquired turning angle and the acquired connection angle when the vehicle is making a steady turn.

Abstract: A control system of an internal combustion engine which performs diffusion combustion by compression autoignition on fuel injected in a main injection in at least a partial operating range and which performs stratified combustion by spark ignition using a spark plug on fuel injected prior to the main injection. The control system determines whether or not the diffusion combustion occurs and performs combustion by spark ignition using the spark plug on the fuel injected in the main injection when it is determined that the diffusion combustion does not occur.

Abstract: A control system of an internal combustion engine which performs diffusion combustion by compression autoignition on fuel injected in a main injection in at least a partial operating range and which performs stratified combustion by spark ignition using a spark plug on fuel injected prior to the main injection. The control system determines whether or not the diffusion combustion occurs and performs combustion by spark ignition using the spark plug on the fuel injected in the main injection when it is determined that the diffusion combustion does not occur.

Abstract: Disclosed is a piston (16) that is capable of not only suppressing the occurrence of knocking but also reducing cooling loss in an internal combustion engine in which a tumble flow is formed in a cylinder. The piston for the internal combustion engine in which the tumble flow is formed in the cylinder includes a non-adiabatic region (50) that is a region on a piston upper surface (35) brought into contact with the tumble flow during an intake stroke and has no insulating layer. The piston also includes an adiabatic region (52) that is a region on at least a part of the piston upper surface excluding the non-adiabatic region and has an insulating layer.

Abstract: An ECU 1 is provided for an engine 50 provided with an exhaust VVT 57 which is capable of varying opening and closing timings of an exhaust valve 55A of plural exhaust valves 55 provided for a combustion chamber 58 with respect to opening and closing timings of an exhaust valve 55B of plural exhaust valves 55. The ECU 1 is provided with a control unit performing the phase control for making the opening timing of the exhaust valve 55A identical to the opening timing of the exhaust valve 55B when the engine 50 accelerates. Specifically, the control unit performs the advance control for making the phase of the exhaust valve 55A identical to the phase of the exhaust valve 55B.

Abstract: An ECU 1 is provided for an engine 50 provided with an exhaust VVT 57 which is capable of varying opening and closing timings of an exhaust valve 55A of plural exhaust valves 55 provided for a combustion chamber 58 with respect to opening and closing timings of an exhaust valve 55B of plural exhaust valves 55. The ECU 1 is provided with a control unit performing the phase control for making the opening timing of the exhaust valve 55A identical to the opening timing of the exhaust valve 55B when the engine 50 accelerates. Specifically, the control unit performs the advance control for making the phase of the exhaust valve 55A identical to the phase of the exhaust valve 55B.

Abstract: A control apparatus for a Stirling engine that uses exhaust gas of an internal combustion engine as a high-temperature heat source and is provided with a starter that drives an output shaft, includes a control unit that drives the starter in starting up the Stirling engine, stops driving the starter when a rotational speed of the Stirling engine reaches a target rotational speed, and then drives the starter again when the rotational speed of the Stirling engine becomes lower than a predetermined value.

Abstract: Disclosed is a piston (16) that is capable of not only suppressing the occurrence of knocking but also reducing cooling loss in an internal combustion engine in which a tumble flow is formed in a cylinder. The piston for the internal combustion engine in which the tumble flow is formed in the cylinder includes a non-adiabatic region (50) that is a region on a piston upper surface (35) brought into contact with the tumble flow during an intake stroke and has no insulating layer. The piston also includes an adiabatic region (52) that is a region on at least a part of the piston upper surface excluding the non-adiabatic region and has an insulating layer.

Abstract: An intake port structure of an internal combustion engine includes an intake port, a valve shaft provided in proximity to an inner wall of the intake port, and an airflow control valve having a proximal end which is pivotally supported on the valve shaft and a distal end which becomes part of the inner wall of the intake port when the airflow control valve is fully opened. The inner wall of the intake port has a recess into which the airflow control valve is partially or entirely retracted when the airflow control valve is fully opened. The recess has a flow smoothing portion located downstream of the proximal end.

Abstract: In an intake system for an internal combustion engine wherein a partition plate is provided within an intake pipe in a longitudinal direction so that an inside is divided into a first intake passage, which is an upper side passage of the above described intake pipe, and a second intake passage, which is a lower side passage of the above described intake pipe, and an intake control valve for opening and closing the second intake passage is provided, the partition plate has holes which connect the first intake passage to the second intake passage and allow fuel on a lower surface of the partition plate to be sucked out to the first intake passage. When an intense tumble flow is created in the first intake passage in the intake system, an air flow toward the first intake passage from the second intake passage is created in the holes so that the fuel that adheres to the partition plate can be sucked out.

Abstract: In an intake system for an internal combustion engine wherein a partition plate is provided within an intake pipe in a longitudinal direction so that an inside is divided into a first intake passage, which is an upper side passage of the above described intake pipe, and a second intake passage, which is a lower side passage of the above described intake pipe, and an intake control valve for opening and closing the second intake passage is provided, the partition plate has holes which connect the first intake passage to the second intake passage and allow fuel on a lower surface of the partition plate to be sucked out to the first intake passage. When an intense tumble flow is created in the first intake passage in the intake system, an air flow toward the first intake passage from the second intake passage is created in the holes so that the fuel that adheres to the partition plate can be sucked out.

Abstract: An intake port structure of an internal combustion engine includes an intake port, a valve shaft provided in proximity to an inner wall of the intake port, and an airflow control valve having a proximal end which is pivotally supported on the valve shaft and a distal end which becomes part of the inner wall of the intake port when the airflow control valve is fully opened. The inner wall of the intake port has a recess into which the airflow control valve is partially or entirely retracted when the airflow control valve is fully opened. The recess has a flow smoothing portion located downstream of the proximal end.

Abstract: An intake device includes an intake pipe, a valve having a downstream side including a cutoff portion and an upstream side rotatably attached to an inner wall of the intake pipe, and a partition plate provided in the intake pipe so as to divide an intake passage in the intake pipe into an upper intake passage and a lower intake passage. The valve has an open state in which the upper and lower intake passages are open, a closed state in which the upper and lower intake passages are closed; and an intermediate state in which the lower intake passage is closed.

Abstract: An intake device includes an intake pipe, a valve having a downstream side including a cutoff portion and an upstream side rotatably attached to an inner wall of the intake pipe, and a partition plate provided in the intake pipe so as to divide an intake passage in the intake pipe into an upper intake passage and a lower intake passage. The valve has an open state in which the upper and lower intake passages are open, a closed state in which the upper and lower intake passages are closed; and an intermediate state in which the lower intake passage is closed.