Vol. 18 No. 1 (2003)

This paper contains the testing of a spark ignition engine to observe the influence of the engine temperature variation on the ignition timing. The engine temperature of Toyota 7K equipped with EFI self developed by LMBSP is varied and the performance test is conducted over the variations of load and rpm, which simulate the real condition on the road. The aim of the experiments is to yield the ignition timing which produces the optimum performance at any load condition.

Since the begining of the first world war, the development and production of aircraft, especiallythe aircraft engine is booming, due to the urgent need of several leading countries to compete and gain superiority in the air for its survival and also to achieve hegemony politically as well as in the field of economy.World aircraft and engine producer were all involved in this competition, supported by its national - research - industrial and technological as well as high education centers. Many engine types, with various technological - level and specification is now available in the world…

This paper describes the study and implementation of enveloping method to detect a local bearing defect. First, it discusses the limitation of the conventional methode in bearing defect detention which is widely used in industry nowadays. The steps required to implement enveloping method are then studied and parameters influencing the success of detection process is identified. To demonstrate the effectiveness of the enveloping method, an experiment is performed to detect defect of a bearing with a simulated inner-race defect. The results of this study show that the enveloping method capable…

This paper presents a theoretical and experimental study on active control structure excited by seismic loads using artificial neural network Artificial neural network is used to calculate the control force based on acceleration of the structure which is obtained by accelerometer measurement. The control mechanism is implemented on the structure using active stiflness and mass based on continuous vibration measurement. The reability of the active control system with artificial neural network has been tested experimentally using a reduced model of two=storey steel flame excited by base…

In this study, a mechanical fuel direct injection system is used in a two-stroke 70 cc gasoline engine. The injection system is using a high pressure pump (injection pump) and an injector (Nozzle) from a 5 hp diesel engine that mechanically is operated by a cam. The modifications on the two stroke gasoline engine are unthrottle intake system, additional hole in the cylinder head for the injector and a camshaft system. The camshaft is connected to the crankshaft. Theperformance of the engine is tested and the result is compared with the performance of the carburetor system engine in the same…