Honda Giken Kogyo Kabushiki Kaisha

Naoki Ohta

Tsuneo Endoh

Tsutomu Takahashi

Yasunobu Kawakami

Tsutomu Hayashi

Hiroshi Ichikawa

Masashi Shinohara

Jun Iwamoto

Kensuke Honma

Atsushi Baba

Hiroyuki Niikura

Naoki Itoh

Masayasu Sakata

Katsuharu Kinoshita

Yuichi Itoh

Masaru Kanno

Naoki Kamide

A Rankine cycle system is provided in which, with regard to a given relationship between the pressure (Pevp) and the temperature (Tevp) of a vapor that is taken into an expander () that includes a cylinder chamber in a first stage and a vane chamber in a second stage, the chambers being disposed in line, the expansion ratio of the vapor that the expander () takes in and discharges is set at a predetermined expansion ratio (&#x3b5;) according to the given relationship so that the pressure (Pexp) and the temperature (Texp) of the vapor that is discharged from the expander () coincide with target values, thereby making the expander () and the condenser () exhibit maximum performance. Since the vapor within the cylinder chamber in the first stage is in a superheated vapor region and contains no water, the phenomenon of water hammer will not be caused in the cylinder chamber. Furthermore, since the vapor at the exit of the vane chamber is in a saturated vapor region and contains water, the vane chamber can be lubricated and sealed by means of the water.

Rankine cycle device

A waste heat recovering device for an internal combustion engine includes: an internal combustion engine; and an evaporator into which an exhaust gas of the internal combustion engine is introduced as a high temperature fluid. An exhaust gas inlet of the evaporator is placed adjacent to an exhaust valve of the internal combustion engine. Thus, there can be provided a waste heat recovering device having a high waste heat recovery rate.

Waste heat recovery device for internal combustion engine

A waste heat recovering device for a multi-cylinder internal combustion engine, wherein among a plurality of exhaust pipes extending from cylinders of a multi-cylinder internal combustion engine, a plurality of exhaust pipes unlikely to cause exhaust interference are collected to form one or more collecting pipes. A heat exchanger for recovering heat of exhaust gas is provided in the one or more collecting pipes. Therefore, a waste heat recovering device can be provided, in which the number of heat exchangers is reduced compared to the number of cylinders of the multi-cylinder internal combustion engine to reduce rest periods of the heat exchanger and reduce spaces occupied by the heat exchanger.

Waste heat recovery device of multi-cylinder internal combustion engine

A mechanism for forming a liquid-tight seal around the rotary shaft of a liquid pump having a stationary ring attached to the casing of the pump and a rotating ring attached to the rotary shaft and contacting the stationary ring. The stationary ring is formed from baked carbon, while the rotating ring is a sintered product of silicon nitride. The stationary ring has an effective seal width ratio, rp/Di, of 0.07/1 to 0.22/1, where rp is the width of the effective seal surface of the stationary ring and Di is its inside diameter.

Mechanism for forming a seal around the shaft of a liquid pump

A swash-plate hydraulic pressure device for use as a hydraulic pump or motor includes a cylinder block having an annular array of cylinder holes defined therein around an axis. A plurality of plungers of a ceramic material are reciprocally movably disposed in the cylinder holes, respectively, the plungers having respective partly spherical tip ends. A swash plate of metal is disposed around the cylinder block for rotation with respect to the cylinder block, the swash plate having a annular groove of a partly spherical cross section defined therein and, the partly spherical tip ends of the plungers engaging in the groove. The tip ends of the plungers preferably have a pore area percentage of at most 7.8% and a maximum surface roughness of at most 1.6 s. The partly spherical tip end of each of the plungers has a radius R.sub.0 of curvature, each of the plungers has a diameter D, the groove has a radius R.sub.1 of curvature and a depth E. The ratios R.sub.0 /D, R.sub.0 /R.sub.1, and E/R.sub.0 preferably are in the ranges of 0.52.ltoreq.R.sub.0 /D.ltoreq.0.62, 0.81.ltoreq.R.sub.0 /R.sub.1 .ltoreq.0.87, and 0.36.ltoreq.E/R.sub.0 .ltoreq.0.42. Each of the plungers has a beveled surface on an end thereof opposite to the partly spherical tip end thereof, the beveled or rounded surface preferably having an axial depth of at least 0.6 mm.

Swash-plate hydraulic pressure device

Growing community of inventors

Wako, Japan

Naoki Ohta