การสร้างและหาประสิทธิภาพชุดฝึกปฏิบัติระบบฉีดเชื้อเพลิงอิเล็กทรอนิกส์ของเครื่องยนต์แก๊สโซลีน

Abstract

This research aimed to develop and evaluate the efficiency of a practical training kit for the electronic fuel injection system of Gasoline Direct Injection (GDI) engines, designed for the course "Electronic Fuel Injection System" (Code: 20101-2104). The goals are to determine the quality of the training kit and to compare students' academic achievement before and after using the training kit. 

            The study involved twenty vocational students at Level 3/1, Group 2, Automotive Technology, Semester 2 of the 2566 academic year, at Prachinburi Technical College. The sample was selected through purposive sampling. The study The experimental duration was 7 hours. The tools used in the study were included:  1) The practical training kit for the electronic fuel injection system of Gasoline Direct Injection (GDI) engines.  2) Instructional materials for the course "Electronic Fuel Injection System" (Code: 20101-2104). 3) A questionnaire to evaluate the quality of the training kit across four dimensions: design, worksheets, content, and user manuals. 4) A test for measuring academic achievement on the topic of electronic fuel injection systems of Gasoline Direct Injection engines. The quality assessment was conducted by 9 experts. Data were analyzed by using mean, standard deviation, and t-test. 

            Research Findings 1) The developed training kit demonstrated high efficiency with E1 = 87.55 and E2 = 91.88, surpassing the standard threshold of 80/80.  2) Quality evaluation by 9 experts showed excellent ratings across all dimensions, with an overall average of 4.79, indicating very high quality. 3) The comparison of academic achievement revealed a statistically significant improvement in post-test scores compared to pre-test scores at the 0.05 significance level. 

            The developed practical training kit for the electronic fuel injection system of Gasoline Direct Injection engines was of high quality and suitable for instructional used in the course "Electronic Fuel Injection System" (Code: 20101-2104). Students demonstrated significantly improved academic achievement after using the training kit.