Honda Motor Co., Ltd.

Koichi Ikoma

Kenji Abe

Akinori Maezuru

Yuji Yasui

Masahiro Sato

Koichiro Shinozaki

Masanobu Takazawa

Katsura Okubo

Masakazu Kinoshita

Koichi Eto

Katsuya Minami

A device and method for calculating the work load of an engine more efficiently and accurately. The device for calculating the work load of an engine comprises a means for determining a desired frequency component to calculate the work load of the engine obtained through frequency decomposition of the volume variation rate of the engine. The device further comprises a first calculating means for calculating a first correlation coefficient between the volume variation rate and a reference signal composed of a frequency corresponding to the determined component, and a second calculating means for calculating a second correlation coefficient between the cylinder inner pressure of the engine and a reference signal composed of a frequency corresponding to the determined component. The work load of the engine is calculated using the first and second correlation coefficients.

Apparatus and method for calculating work load engine

A stroke characteristic variable engine comprising a primary link connected to a piston which is slidably fitted in a cylinder, a secondary link connecting the primary link with a crankshaft and a tertiary link connected to the primary link or the secondary link at one end and to an engine main body via a control shaft at the other end thereof. An oil level position of engine oil stored in an oil pan is set such that at least part of the control shaft is submerged in the engine oil, whereby since oil stored within the oil pan can be used as it is, the lubrication around the control shaft can be ensured in a simplified configuration.

Stroke characteristic variable engine

Provided is a variable stroke property engine that can prevent an increase in the resistance to the engine owing to the contact between the variable stroke piston mechanism and lubricating oil. In a variable stroke property engine equipped with a variable piston stroke mechanism consisting of a plurality of linksand, a baffle plateis provided between the links and the oil surface of the lubricating oil received in an oil pan so that the links may be separated from the oil surface by the baffle plate and the lubricating oil is prevented from contacting the links. Thereby, an increase to the resistance to the movement of the links can be avoided.

Variable stroke property engine

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Saitama, Japan

Koichi Ikoma