Daifuku Co., Ltd.

Yahiko Iwasaki

Yoshifumi Okuda

Yuzo Uotani

Satoshi Miyahira

Kenji Nakatsu

When a knocking detector mounted on a cylinder block of an engine is inspected, the cylinder block is vibrated by a vibrating unit via a housing connected to the cylinder block, and the performance of the knocking detector is judged based on whether or not a peak value of a voltage variation value serving as a detection value of the knocking detector is below a threshold value which has been set based on a peak value of a test voltage variation value serving as a reference value.

Method and apparatus for inspecting knocking detector

An apparatus for detecting a compression top dead center phase includes an external driving portion for driving a crankshaft of an engine, a phase sensor for detecting a top dead center phase of the crankshaft, which corresponds to a top dead center position of a specified cylinder of the engine, an exhaust pressure sensor that is arranged in an exhaust duct connected to an exhaust port of the engine, and that detects an exhaust pressure in the exhaust duct, and a controller that receives a signal from the exhaust pressure sensor.

Apparatus for detecting compression top dead center of an engine

The invention discloses a rotational driving apparatus for cold testing an internal combustion engine to which a ring gear is attached. The rotational driving apparatus has a rotor that is rotatively driven about the rotation axis of the ring gear of an internal combustion engine that is in the testing position. A pivot arm is supported rotatably with respect to the rotor via a link pin. The front end portion of the pivot arm is provided with an engaging portion that can engage the ring gear through shifting to the inward side with respect to the radial direction. The pivot arm also has a portion that extends rearward of the link pin. When the rotor is rotated, this portion extending to the rear generates a torque in the direction in which the engaging portion is shifted so as to engage the ring gear. A link that extends at an angle that is nearly perpendicular to the rotation axis is joined to the rear end of the pivot arm. The other end of the link is joined to a reciprocating member that is shifted in the direction along the rotation axis by an actuator.

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Shiga-ken, Japan

Yahiko Iwasaki