All issues
Volume 49, Issue 4
Displaying 1-11 of 11 articles from this issue
- |<
- <
- 1
- >
- >|
-
Tomohiko ICHIKAWA1987 Volume 49 Issue 4 Pages 317-318
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (403K) -
Hirotsugu YONEDA1987 Volume 49 Issue 4 Pages 319-328
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1423K) -
Studies on the Lateral Drift of Rubber TiresTakemi MACHIDA1987 Volume 49 Issue 4 Pages 329-337
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe main purpose of this study was to determine the relations between the lateral drift, slope angle, tire camber, tire welight and slip when running across a slope.
It was done by using the mono wheel lateral-drift analyzer, a plywood surface and a model tire (3.50-5 4PR, inflated at 0.1MPa), and carried out according to the preliminary work which was presented in the previous paper (part 1).
It was found that the amount of lateral drift was a function of slope angle and slip which could be expressed using slip as the primary parameter.
Also studied using test data, was a method of computing the correct steering angle of a vehicle to run along the contour with zero drift.View full abstractDownload PDF (1307K) -
Deposit droplet size distribution and spread surface mean diameterToshitaka UCHINO, Masaki MATSUO, Mitsuo IIMOTO1987 Volume 49 Issue 4 Pages 338-344
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe deposit and spread diameters of sprayed droplets with an ionized field charging twin-fluid nozzle (RG) and a direct charging spinning disk nozzle (MB) were measured by an image data analyzer. The distribution functions and spread surface mean diameters were calculated and discussed.
The deposit and spread droplet size distributions of RG and MB were conformed to the Nukiyama-Tanasawa's distribution function.
The spread surface mean diameter of RG was affected by atomizing air flow rate Qaa and the droplet size distribution became more uniform with increase of Qaa. The mean diameter of MB was extremely decreased and the droplet size distribution became narrow and uniform with increase of voltage V and rotational speed N. And also, the mean diameter of MB became larger and the distribution became more ununiform with increase of distance from center of spray pattern to the sampling position.View full abstractDownload PDF (1124K) -
Jinzo NAGAHIRO, Ken HIGUCHI1987 Volume 49 Issue 4 Pages 345-352
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper, following the report (I), deals with the experimental determination of the various design criteria for the development of a practical bio-gas and charcoal generator which produces the high calorie bio-gas and the high quality charcoal continuously. The experiments were performed by using the small-generator of crank-type built as a trial. The results are summerized as follows: (1) The time required for the thermal decomposition of the compressed rice-husk, which moves through the inside of a thermal decomposition tube of the inner diameter ∅33mm, is about 19, 11, and 9 minutes at 500, 800, and 1000°C, respectively. (2) The quantity of bio-gas Vg and that of charcoal Mc2 at 500°C are 0.094m3/kg and 460g/kg, respectively, but, at 1000°C, Vg is jumped to 0.316m3/kg and Mc2 is reduced to 355g/kg. (3) The bio-gas over 13.5MJ{3200kcal}/m3 canbe generated at 700-900°C. It is useful as auxiliary fuel.View full abstractDownload PDF (6379K) -
A Profitability of Solar Grain DryingKazuo HORIBE, Seiichi OHSHITA, Kengi NAKAGAWA1987 Volume 49 Issue 4 Pages 353-361
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe method was described to evaluate the economic efficiency of a solar drying system and the trial calculation example was shown. In the case that a solar drying system is newly introduced, the capital recovery method was selected from a viewpoint of the recovery of the facility investment. The economic efficiencies were evaluated with this method for both systems, that is, the system of an existing dryer equipped with a solar collector which uses kerosene as a supplementary heat source and the system of grain drying facility utilizing only solar energy as a heat source.
The energy cost comparative method was proposed to be available to examine the economic efficiency of the solar drying system without any supplementary heating equipment, because its heat source is quite different from a conventional heated-air dryer. An example was presented to show the concrete procedure of calculation.View full abstractDownload PDF (1463K) -
Permeability of Soils after Plowing in Paddy FieldSadami YADA, Tokunori FUJITSUKI1987 Volume 49 Issue 4 Pages 362-368
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSPlowing with powered diskharrow plow under high moisture conditions of clay soils have induced the decrease of permeability in the layer below plowed soils. Therefore, it was investigated on conditions to add projected plates near the edge of disks in order to prevent the decrease of permeability in soils. In order to prevent the decrease of permeability in soils after plowing, the top edge of projected plates had to be directed outward from extension line of disk curvature, and the attaching pitch of projected plates of 8-13cm was an appropriate to cutting the plow soil pan. 5-6 projected plates were necessary to 22 inch disk in the peripheral velocity ratio of 3.5.View full abstractDownload PDF (5405K) -
Tatsushi TOGASHI, Takashi KUWANA, Kazutomo ICHITO1987 Volume 49 Issue 4 Pages 369-380
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to measure loads on tractor wheel when a tractor was actually working on sloping ground, 3 types of measuring apparatuses (prototype, improved type and reimproved type) were orderly developed. The apparatuses were fitted to axle housing of a tractor and could independently measure 3 loads (lateral load, vertical load and torque) acting on the contact point between tractor wheel and the ground.
Reimproved type was developed to be fit for front wheel of 4WD tractor, The results on the accuracy of measurement by the apparatus were as follows;
1. Scattering in calibration of the each independent load without interaction was less than 10% of the calibration value.
2. The influence of interaction by the other load could not be disregarded, especially by torque, but the new calibration diagram could be obtained under the influence of the other loads with nearly the same scattering compared to the calibration under the independent load.
These results led us to the conclusion that reimproved type was effective for measuring the actual loads on tractor wheel.View full abstractDownload PDF (4103K) -
The Testing System for PTO Perf or manceKunio NISHIZAKI, Yasuo OHSHITA, Shigeru YAGI, Norikazu OHTAKE, Yasuroh ...1987 Volume 49 Issue 4 Pages 381-390
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTesting systems for tractor PTO performance have been developed. These systems using computers automatically control dynamometers, and perform data acquisition and data processing.
The first system was made in 1979. And the second system was designed in 1982 to increase the capacity for power and to improve the system operations.
As the results of practical tests, the accuracy and the reliability of test data and the testing efficiency were much improved.View full abstractDownload PDF (1442K) -
Masaki MATSUO, Toshitaka UCHINO, Mitsuo IIMOTO1987 Volume 49 Issue 4 Pages 391-394
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (636K) -
Akira ISHIHARA1987 Volume 49 Issue 4 Pages 395-400
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (15474K)
- |<
- <
- 1
- >
- >|