국산(國産) 농용발동기(農用發動機)에 대(對)한 성능시험(性能試驗) = Performance Tests of the Korean Farm Engines

다국어 초록 (Multilingual Abstract)

Institute of Agricultural Engineering & Utilization had tested 28 engines which were manufactured in Korea in 1963. The purpose of this test is to present the information of various engine to farmer and government to select good farm engine. This test had carried out according to KS B 6002 “Testing Method of Small Internal Combustion Engine”，and results of the test are as follows:
1. The output of engine were measured by proney brake at the each manufacturing company because of difficulty of transportation.
2. On the test, one diesel engine and one petro engine could not exceed their indicated ps and 110 % load, while one diesel engine and two petrol engines exceeded fuel consumption rate which provided in Korean industrial standards. The other engines were satisfactory on Korean industrial standards.
3. The engines 5ps should be produced to be used with diesel in Korea to save fuel expense, the operation cost of diesel engine considered only fuel expense is less than petrol engine.
4. On the governing speed test, diesel engines and one petrol engine exceeds the limited fluctuation on Korean industrial standard and the other 23 engines weres satisfactory.
5. Five diesel engines had vibration in operation, and one diesel engine was not good combustion condition" Also one petrol engine leaked out its compressed air.
6. The hardness of piston pin of 14 engines was softer than H_RC 50~65 provided in K.S. and the hardness of exhaust and suction valve of 13 engine was not exceed over H_RC 104 in K.S. The others had adequate hardness on Korean industria standard.
7. Two petrol engines had lower compression ratio of all of the diesel engines satisfied the Korean industrial standard 15:1-22:1.
8. The weight per ps of diesel engines was generally kg. and heavier than petrol engine.
9. In accordance wich above results, seven engines were passed the test by A class and 17 engines were passed the test by B class. The passing rate-of the test was 86%, and this rate is higher than the past year.
10. Home product diesel and petrol engines are not adequate for moving operation because of heavyweight caused by low speed. Those low speed engine should be developed to high speed to apply power tiller and power spraer.