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Dhinagar, S. J.
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Self-Diagnosis of Inductive Ignition System for Use in Small Engine

TVS Motor Co.-Himadri Bhushan Das, Naga Kavitha, B. S. Rohini, S. J. Dhinagar
  • Technical Paper
  • 2006-05-0307
Published 2006-10-22 by Society of Automotive Engineers of Japan in Japan
In today's automotive field of diagnosis of Electronic actuators used in the area of Engine Control is of great importance. It is possible now to conduct limited diagnostics with an onboard Electronic Controller by performing checks of different parameters of an Engine. Engine output parameters like torque and speed depend on input to the engine viz. Fuel quantity, Spark and Air Quantity. For diagnosis of engine, the variations of input variables have to be monitored. The input variables may differ because of improper operations of actuator.Diagnosis of actuators evolved in a period of time from threshold value check diagnosis to model-based diagnosis. This paper focused on model-based diagnosis of ignition system. Algorithms are discussed with test results for predicting the reasons for the improper behavior of the Spark Plugs for small petrol engines.The main function of spark plug is to generate right amount spark energy at right time with the help of Electronic Control Unit. Variation from the right amount of spark energy leads to partial misfire and finally to more emissions. So monitoring spark…
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Micro-controller Based Electrical Energy Monitoring And Control System for a Low Power Two Wheeler Application

TVS Motor Company, Hosur, India-K. L. Jean, S. J. Dhinagar
Published 2005-01-19 by The Automotive Research Association of India in India
Automotive electrical system forms the backbone of the modern vehicles. The increase in electrical and electronics equipment fitted in the vehicle has resulted in increased power requirements. Today's two-wheeler vehicle electrical system has a magneto, which is the main source of energy and it is directly coupled with the engine shaft. The magneto output charges the battery as well as supplies power to the load.Because of the engine magneto coupling, as the engine speed increases, the output power of the magneto also increases. So even when power is not required and not necessary in certain situations, power is being generated but not utilized, at the cost of loading the engine and thereby increasing its fuel consumption. This surplus power generation causes power wastage and leads to inefficient power utilization. This unnecessary loading of the engine also reduces the engine torque for traction.The electrical loads on the battery and the magneto are at present controlled by the usage pattern of the driver because the loads are directly linked with the sources by means of the switches.…
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Development of a Low Cost Engine Simulator for HIL Testing

TVS Motor Company, Hosur, India-B. S. Rohini, Himadri B. Das, K. N. Kavitha, S. J. Dhinagar
Published 2005-01-19 by The Automotive Research Association of India in India
The growing challenges being met by the automotive industry are raising the needs and expectations for detailed simulation with in short time. Today there is more pressure to get products to market faster and reduce design cycle times. This has led to a need for dynamic testing, where components are tested while in use with the entire system, either real or simulated, unlike in static testing where only typical functional testing is done. This dynamic testing is defined as Hardware-in-Loop (HIL) testing where it includes sensors to send signals to the control system, actuators to receive signals, a controller to process data, a Human-Machine Interface (HMI) and a development post simulation analysis platform.The engine simulator, which is proposed in this paper, has been developed by TVS-M using a high speed embedded controller with a FPGA based I/O module. In the background a complex plant model of engine is running in a dedicated operating system platform. This simulator generates engine related signals (crankshaft signal, engine temperature signal) in response to the control signal generated by the…
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