Hitachi, Ltd.

Shozo Yanagisawa

Toshifumi Usui

Tadao Osawa

Yutaka Takaku

Sigeo Tamaki

Hirotoshi Kawano

Isamu Ishizawa

A multiple throttle mechanism comprises a pair of intake manifold blocks separated from each other and each having two or more parallel passages formed therethrough and a wall portion separating thereby the adjacent parallel passages, the parallel passages each being a part of each of the intake manifold passages communicating with respective engine cylinders, and a pair of throttle shafts arranged in an axial direction, each crossing the parallel passages, passing through a through hole formed in the wall portion of the intake manifold block and supported on the intake manifold block, the throttle valves being mounted on the throttle shafts so that the throttle valves are operated simultaneously to control the cross sectional area of each of the parallel passage. The multiple throttle mechanism further comprises air gaps formed between an inner circumference of the through holes and an outer circumference of the shafts to provide an initial air flow.

Multiple throttle mechanism for internal combustion engines

A control device for a throttle valve for use with an internal combustion engine installed in a vehicle. The device has a throttle valve shaft secured to the throttle valve, and a linkage to be driven by a linkage member including an accelerator wire for opening and closing the throttle valve. The linkage is a three-joint linkage mechanism including a throttle lever secured to the throttle valve shaft, a lever-mounting shaft secured to the throttle body, a drive lever rotatably mounted on the lever-mounting shaft, and a rod connecting the throttle lever and the drive lever.

Control device for throttle valve for internal combustion engine

An intake air flow sensor comprises a sensor main body and a connection unit main body, the former consisting of a main passage for passing intake air and a bypass passage for bypassing part of the air flowing through the main passage and joining it again to the air of the main passage. An intake air flow meter is disposed in the bypass passage to measure the intake air quantity. The bypass passage has an opening which opens to the main passage. A ring is fitted into the main passage of the sensor main body in such a manner as to close part of the opening of the bypass passage. An insulator is clamped by the ring and the connection unit main body. According to this construction, the area of the opening of the bypass passage to the main passage is not changed due to deformation of an insulator when the insulator is interposed between the sensor main body and the connection main body and they are fixed together by bolts.

Intake air flow sensor

An exhaust emission control apparatus for a Diesel engine includes a filter collecting particulates contained in exhaust gases of the Diesel engine and a fuel supply device supplying fuel required for burning the collected particulates. The fuel supply device controls the amount of supplied fuel so that the temperature of the filter can be raised to a level high enough for burning the collected particulates but not so high as to damage the filter itself by the heat applied thereto. A control unit executes the fuel control on the basis of the temperature of the filter and the pressure drop across the filter.

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Ibaraki, Japan

Shozo Yanagisawa