Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Yukitaka Sakata

Tsuyoshi Munezane

Naoya Hashii

Masaya Inoue

Yoshiaki Kitta

Tadashi Murakami

Koichi Ojima

Kyosuke Watanabe

Katsunari Takagi

Keisuke Ito

Manabu Yoshinori

Shota Kawasaki

An electric rotating machine that can raise the utilization efficiency of cooling oil is obtained. In an rotation axle, there are provided an oil flow path having a predetermined length from an end of the rotation axle and a flow path hole that communicates with the oil flow path and has an opening toward the inside of the electric rotating machine; a supporting member includes a cylinder section and a disk section that partitions the cylinder section in the axis direction, and a discharging hole is provided at an end of the cylinder section; between the flow path hole and the discharging hole, there is provided a partition plate that encloses a space formed by the supporting member and the rotation axle and guides cooling oil traveling from the flow path hole to the inside of the electric rotating machine to the discharging hole.

Apparatus for cooling an electric rotating machine

Provided is an electric motor capable of cooling a stator without being increased in size with a small number of components and even with simple work. The electric motor includes ring-shaped sealing members () having flexibility and being arranged on an inner diameter side of a stator coil () so as to surround inner diameter portions of coil ends. Cooling oil flowing from an upper part of a housing into the housing flows downward through coil end oil paths () formed by the sealing members (), coil end covers (), and the coil ends.

Rotary electric machine

When injection-hole inlets and injection-hole outlets are projected vertically onto an X-Y plane (N) perpendicular to a valve-seat axial center, an injection-hole arrangement angle (&#x3b8;), which is formed by a straight line (a) passing through a center of the injection-hole inlet of a reference injection hole and the valve-seat axial center and a straight line (b) passing through a center of the injection-hole inlet of the injection hole neighboring the reference injection hole and the valve-seat axial center on the plane (N), is set so as to become smaller as being closer to a Y-axis. A fuel turn angle (&#x3b1;) on a wide-angle side, which is formed by the straight line (a) and a straight line (c) passing through a center of the injection-hole inlet and a center of the injection-hole outlet on the plane (N), has a relationship: 90&#xb0;&#x3c;&#x3b1;&#x3c;180&#xb0;.

Fuel injection valve

At the downstream-side face of an injection hole plate, a plurality of concaves are arranged corresponding to a plurality of injection holes; at least part of an injection hole outlet opens at the plain of the concave; the rest of the outlet opens at the downstream side face of the injection hole plate or contacts the inner surface of the concave. In a flow path formed by the injection hole, there is provided a cylindrical portion, whose cross section is the radially minimum cross section of the injection hole, from the upstream side face of the injection hole plate to the plain of the concave. Where Ddenotes the diameter of the injection hole and Ddenotes the diameter of the concave or the diameter of the concave in the circumferential direction of the virtual circle, the relationship 1.1&#x3c;(D/D)&#x3c;3.0 is satisfied.

A plate convex is formed on the upstream side of the injection hole plate and a plate concave is formed on the downstream side of the injection hole plate so as to form a pair together, a minimum of one set of the plate convexes and the plate concaves are formed, and the injection holes are arranged so that the radial centerline which connects the centerline of the plate convex from the axial center of the fuel injection valve does not overlap the center of the injection hole on an upstream flat surface of the injection hole plate, and the plate convex is arranged so as to straddle the injection hole on the upstream flat surface of the injection hole plate, and the top surface of the plate convex.

Growing community of inventors

Chiyoda-ku, Japan

Yukitaka Sakata