Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Shiro Tanno

Yasushi Ito

Kazuki Iwatani

Hideyuki Nishida

Keiji Yoeda

Shouji Katsumata

Ryo Michikawauchi

Jun Miyagawa

Tsutomu Kawae

Satoshi Komori

Shinji Harada

Kazuhiro Ohmae

A hydrogen engine in which hydrogen gas is supplied into a combustion chamber as fuel, comprises: an injector for injecting hydrogen gas; a pressure accumulation chamber communicating with an injection hole of the injector; a communication hole communicating with the pressure accumulation chamber and the combustion chamber; and a pressure accumulation chamber defining portion provided between the injector and the combustion chamber and defining the pressure accumulation chamber and the communication hole. The pressure accumulation chamber defining portion is formed separately from the injector and has a thermal conductivity equal to or higher than a thermal conductivity of a combustion chamber wall defining the combustion chamber.

Hydrogen engine

A compression-ignition internal combustion engine includes a fuel injection nozzle including a tip end portion exposed in a combustion chamber and a nozzle hole formed at the tip end portion; and a passage forming member forming a flow guide passage through which fuel injected from the nozzle hole passes. The passage forming member includes a passage wall portion located radially outward of the flow guide passage. The passage wall portion includes a first layer that is a base portion connected to a cylinder head, and a second layer located radially outward or radially inward of the first layer. The toughness of the first layer is higher than the toughness of the second layer. The thermal conductivity of the second layer is lower than the thermal conductivity of the first layer.

Compression-ignition internal combustion engine

An internal combustion engine includes a fuel injection nozzle that is arranged at the center of an upper surface of a combustion chamber with an injection port thereof exposed in the combustion chamber, and a piston arranged in a cylinder. On a top surface of the piston, a flow guide passage is provided which extends from an inlet exposed on the side of a wall of a bore of the cylinder to an outlet exposed on the side of a center of the bore. The flow guide passage preferably includes a flow guide plate having a ring shape, and a strut that fixes the flow guide plate to the top surface of the piston in such a manner that a clearance extending from an outer edge to an inner edge of the flow guide plate is formed between the flow guide plate and the top surface of the piston.

Internal combustion engine

It is possible to suppress fluctuations of an air intake amount when the open degree of an air intake control valve is unknown. An engine includes an impulse valve common to all the cylinders arranged in the engine. The impulse valve is arranged in a communicating tube provided at the downstream side of a serge tank. An ECU executes impulse valve drive control. In the control, the ECU judges whether a rotation angle sensor which detects the open degree of the impulse valve has failed. If it is judged that the rotation angle sensor has failed, the ECU controls a drive motor and a drive circuit for driving a valve body so that a valve body of the impulse valve rotates inside the communicating tube. Here, the rotor of the drive motor which defines the rotation speed of the valve body has an rpm which is set in accordance with the mechanical rpm NE of the engine.

Apparatus for controlling a vehicle

An ammonia burning internal combustion engine can feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber. When the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the operating parameters of the internal combustion engine are controlled so the air-fuel mixture fed into the combustion chamber is made easier to burn. As a result, an ammonia burning internal combustion engine designed to suppress a drop in combustibility of auxiliary fuel due to ammonia, can be provided.

Ammonia burning internal combustion engine

An internal combustion engine can use ammonia and a non-ammonia fuel which is easier to burn than ammonia as fuel. The non-ammonia fuel is directly injected into a combustion chamber by a non-ammonia fuel injector, and the injected non-ammonia fuel is ignited, whereby combustion of the air-fuel mixture in the combustion chamber is commenced. In the control system of the internal combustion engine, the injection timing of the non-ammonia fuel is advanced at a time when a ratio of ammonia in all fuel fed to the internal combustion engine is high in comparison with the time when the ratio is low. Therefore, a control system of an internal combustion engine capable of using ammonia and a non-ammonia fuel (gasoline, light oil, hydrogen, etc.) which is easier to burn than ammonia, which suitably feeds fuel and controls combustion in order to suitably burn an air-fuel mixture in a combustion chamber is provided.

Control system of internal combustion engine

To improve an ignitability to a fuel having a low compressed ignitability in a combustion chamber in a compressed self-ignition diffusive combustion mode operation. In a multi-fuel internal combustion engine operated by introducing at least one type of fuel among at least two types of fuels having different properties into a combustion chamber or introducing a mixed fuel composed of at least the two types of fuels into the combustion chamber, an electronic control unit is provided with a fuel characteristics detection means that detects an ignitability index value as an index showing a compressed ignitability of a fuel itself introduced into the combustion chamber, and a fuel injection control means that previously injects, when a compressed self-ignition diffusive combustion is performed using a fuel in the combustion chamber, which is determined to have a low compressed ignitability based on the ignitability index value, the fuel at a predetermined timing in a period from an intake stroke to a compression stroke, and thereafter mainly injects the fuel and introduces the fuel having the low compressed ignitability into the combustion chamber.

Multi-fuel internal combustion engine

A multifuel internal combustion engine includes: fuel characteristics determining unit that determines ignitability and anti-knocking performance of the fuel introduced into the combustion chamber CC; combustion mode setting unit that sets a compression hypergolic diffusion combustion mode when ignitability of the fuel is excellent, sets a premixed spark-ignition flame propagation combustion mode when the ignitability of the fuel is poor and anti-knocking performance is excellent, and sets a spark assist compression hypergolic diffusion combustion mode when both the ignitability and anti-knocking performance of the fuel are poor; and combustion control execution unit that makes the engine to drive in a combustion mode which is set by the combustion mode setting unit.

Growing community of inventors

Gotemba, Japan

Shiro Tanno