A compact cultivator called the Pianta that uses a gas canister was developed for use in kitchen gardens.
The butane in the gas canister undergoes phase transition between vapor phase and liquid phase at approximately 0°C under atmospheric pressure, so that fuel supply control and removal of fuel from the gas canister become theoretically difficult at an air temperature of around 0°C. The gas supply system uses the method of removing butane in the liquid phase. It also has a vaporizer placed between the cylinder head outlet and the muffler so that users can start and operate the cultivator during the planting season from March to April, when they start working with the cultivator in outside air temperatures of 5°C.
Compared to the FG201, a gasoline-fueled compact cultivator with the same engine displacement (49.4 cm3), the Pianta showed an approximately 10% reduction in CO2 emissions. The Pianta’s emission performance also met EPA Phase II regulation levels and Japan Land Engine Manufacturers Association self-regulating levels.
The overall width between the outer tines was reduced by 22% relative to the FG201 in order to make the Pianta easier to maneuver in the garden. However, the plow power was raised approximately 15% relative to the FG201 by the adoption of the new model tines and enhancement of the drag bar. The issue of noise when using the cultivator close to residential areas was also addressed by reducing the noise level at the operator’s position by 1.5 dB(A) during operation.
"},{"@language":"ja","@value":"カセットボンベを使用した家庭菜園用小型耕うん機ピアンタを開発した．
カセットボンベ内のブタンは，大気圧下の約０℃にて気相，液相の相変化が起こるため，理論上気温０℃付近でボンベからの燃料取り出しと燃料供給制御が困難になる．本ガス供給システムでは，ブタンの液相取り出し方式の採用と，さらにベーパライザをシリンダヘッド排気口とマフラではさみ込むように配置したことで，ユーザが耕うん機の使用を始める３月から４月の種まき時期における外気温５℃での始動と耕うん作業を可能にした．
また，ピアンタと同排気量（49.4 cm 3）であるガソリン仕様の小型耕うん機 FG201と比較して CO2排出量を約10％削減し，エミッション性能も EPA Phase II規制値および日本陸用内燃機関協会自主規制値に適合した．
畑での取りまわしやすさを向上させるため，耕うん爪幅を FG201に対し22％減としたが，耕うん力は新型耕うん爪の採用と抵抗棒の改良により FG201に対し平均約15％向上した．騒音も，住宅地近くでの使用を考慮して耕うん作業時のオペレータ耳元騒音で 1.5 dB（A）低減した．
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