Analisis Pengaruh Jumlah Lubang Nozzle Injektor terhadap Torsi pada Pembesaran Piston Motor Matic Injection

Sistem injeksi merupakan teknologi yang dapat meningkatkan performa mesin dan efisiensi bahan bakar. Teknologi injeksi bahan bakar (Fuel Injection System) adalah teknologi yang mencampur bahan bakar dengan udara sebelum masuk ke ruang bakar, kemudian disemprotkan dengan tekanan tertentu. Nozzle injektor berperan penting dalam penyemprotan bahan bakar. Terdapat lubang pada ujung nozzle, lubang ini merupakan sarana untuk menginjeksi bahan bakar dengan cara pengabutan. Penelitian ini dimaksudkan untuk mengetahui perubahan torsi dan daya pada sepeda motor honda Beat FI tahun 2014 dengan pembesaran piston 0,75 mm pada jumlah lubang nozzle injektor dengan variasi lubang 4. 6 dan 8 dengan bahan bakar pertamax. Alat yang dilakukan untuk pengujian ini adalah dynotest. Pada penelitian ini didapatkan data berupa kurva dari nilai torsi dan daya pada masing-masing lubang nozzle injektor. Hasil dari penelitian ini mendapatkan torsi dan daya tertinggi pada nozzle injektor lubang 4 dengan torsi maksimum sebesar 6,95 ft-lbs dan daya maksimum sebesar 8,75 HP pada putaran mesin 6.610 rpm. Pada nozzle injektor lubang 6 didapatkan torsi maksimum sebesar 6,82 ft-lbs dan daya maksimum sebesar 8,31 HP pada putaran mesin 6.400 rpm, sedangkan pada injektor lubang 8 didapatkan torsi maksimum sebesar 5,94 ft-lbs dan daya maksimum sebesar 7,14 HP pada putaran mesin 6.310 rpm

Effects of working conditions on the operating characteristics of an injection system applied on CNG fueled vehicles

A model-based study is conducted to examine the operating characteristics of an injection system applied on CNG fueled vehicles. This injection system is a combination of an electric pressure regulator, a rail tube, and a solenoid injector. The electric pressure regulator has a great potential to be widely used in injection systems of natural gas-fueled engines due to its flexible operation, which can help to improve the engine performance and reduce emission. This paper presents a simulation study using mathematical models to describe and analyze the operating characteristics of the gaseous fuel injection system, in which models of electric pressure regulator, solenoid fuel injector, and control model for electric pressure regulator are presented. The simulation results are compared with experimental data to validate the simulation models. Effects of working conditions, including coil resistance of the electric pressure regulator, inlet gas pressure, and set pressure in the rail tube, on the operating characteristics of the gaseous fuel injection system are investigated. Simulation results show that when the coil resistance of the electric pressure regulator is increased from 3.1 Ω to 4.1 Ω, the maximum fluctuation of the controlled gas pressure in the rail tube is reduced from 0.017 to 0.012 MPa, respectively. By decreasing the inlet gas pressure of the electric pressure regulator from 2.5 to 2.3 MPa, the controlled gas pressure in the rail tube is more stable with the maximum fluctuation significantly reduced from 0.012 to 0.002 MPa, respectively, which leads to stability in injection flow rate. The increase of set pressure in the rail tube from 0.5 to 0.7 MPa can help to improve the stability of the controlled gas pressure in the rail tube with the maximum fluctuation respectively reduced from 0.002 to 0.001 MPa.

A Hybrid Taguchi-Regression Algorithm for a Fuel Injection Control System

The fuel injection system is one of the key components of an in-cylinder direct injection engine. Its performance directly affects the economy, power and emission of the engine. Previous research found that the Taguchi method can be used to optimize the fuel injection map and operation parameters of the injection system. The electronic control injector was able to steadily control the operation performance of a high-pressure fuel injection system, but its control was not accurate enough. This paper conducts an experimental analysis for the fuel injection quantity of DI injectors using the Taguchi-Regression approach, and provides a decision-making analysis to improve the design of electronic elements for the driving circuit. In order to develop a more stable and energy-saving driver, a functional experiment was carried out. The hybrid Taguchi-regression algorithm for injection quantity of a direct injection injector was examined to verify the feasibility of the proposed algorithm. This paper also introduces the development of a high-pressure fuel injection system and provides a new theoretical basis for optimizing the performance of an in-cylinder gasoline direct injection engine. Finally, a simulation study for the fuel injection control system was carried out under the environment of MATLAB/Simulink to validate the theoretical concepts.

Studies on Pyrolysis Oil derived from waste Tires as Fuel for Diesel Engine

In recent years, the number of automotive vehicles are increasing as these vehicles are becoming essential in developed and developing countries; which results in increase in waste tires. In most of the developing and under developed countries, the waste tires are not scientifically disposed and pollutes the environment. The synthetic rubber present in the tire is not biodegradable. Hence a research work is carried out to convert the waste tires and tubes into fuel using the process of pyrolysis. The tire pyrolysis oil (TPO) properties were compared with fossil diesel and it was observed that the properties of tire pyrolysis oil and diesel are closer. In the diesel engine the tire pyrolysis oil was used as partial substitute for the diesel and engine tests were performed by varying the engine loads. The results of the engine tests show that the tire pyrolysis oil can be effectively used as partial substitute in diesel engine with no need of making modifications in the engine’s fuel injection system. This paper discusses the waste tire statistics, conversion of tire into tire pyrolysis oil and engine studies with tire pyrolysis oil.

Research using the CNG fuel system from the petrol fuel system for the honda wave engine

The article presents research on Honda wave motorcycle engines using CNG gas based on a corresponding gasoline fuel injection system. In the study, we choose a solution using two nozzles suitable when switching to using CNG fuel. According to the throttle opening, the test results are conducted and can confirm that the engine, when using CNG, has reduced power and torque compared to gasoline. However, using a CNG fuel supply system from the fuel injection system saves time and cost of design and manufacture. The installation is simple, no need to interfere with the engine combustion chamber. As a result, the engine on the car operates reliably, stably, and reliably.