Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Honda Giken Kabushiki Kaisha

Yusuke Endo

Hirotsugu Kudo

Kenji Fujiki

Yoshiaki Koyama

Hideo Ueshima

Toshiyuki Inaba

Osamu Murakami

In an engine, an oil level sensor () provided in a bottom part of an oil pan () storing engine oil so as to stand vertically upright is placed between a mutually parallel pair of balancer shafts () housed in a balancer housing () provided between a lower face of a cylinder block and the oil pan (). This not only enables the oil level sensor () to be placed compactly by utilizing effectively dead space formed between the pair of balancer shafts (), but also enables agitation of engine oil to be suppressed by the pair of balancer shafts () and any degradation in detection precision due to engine oil splashing over the oil level sensor () to be prevented.

Oil sensor placement structure in engine

An engine including an engine oil return passage for returning engine oil from a cylinder head side to an oil pan having a balance shaft forming a balancing system for said engine; and a housing disposed below a crankshaft for accommodating rotatably therein the balance shaft. A part of the engine oil return passage is provided in the housing.

Balance shaft, housing for balance shaft and engine oil return passage

A joint portion of an oil pump shaft and a balancer shaft (output-side balancer shaft ) is provided in an open space between opposite surfaces of a sidewall of an oil pump housing and a sidewall (a bearing portion) of a balancer shaft housing . The joint portion of the oil pump shaft and the balancer shaft is comprised of a pair of engageable portions provided at each end of the balancer shaft and the oil pump shaft , respectively. The engageable portions are disengageably engaged with each other in radial directions of the shafts . The joint portion can be seen from the outside, and thus a joining operation can be performed with ease.

Joint structure for oil pump shaft and balancer shaft

Growing community of inventors

Saitama, Japan

Yusuke Endo