To accommodate for engine modifications, a programmable ECU can be used in place of the factory-shipped ECU. Modern ECUs sometimes include features such as cruise control, transmission control, anti-skid brake control, and anti-theft control, etc. The valves are usually opened sooner at higher speed than at lower speed. The software is stored in the microcontroller or other chips on the PCB., typically in EPROMs or flash memory so the CPU can be re-programmed by uploading updated code or replacing chips. Their Multiair engines use electronic valve control which dramatically improve torque and horsepower, while reducing fuel consumption as much as 15%. The optimal opening and timing are always reached and combustion is as precise as possible. ECM is capable of machining metals and alloys irrespective of their strength and hardness 2. Correct Option: A In ECM, high current improve material removal rate, also material removal rate increase with atomic weight of material. The following table describes the elements you can define within a resource-env-description element. These parameters include: A race-grade ECU is often equipped with a data logger to record all sensor data for later analysis. Resist the temptation to perform any repairs before performing the preliminary diagnostic steps. Which of the following are true for an ECM process? D. Recognize the ECM ID number The correct answer is CAnswer A is correct. For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! Get step-by-step explanations, verified by experts. At part throttle, when less air and gas are needed, the valve lift would not be as great. d. Resistance in the secondary circuit will affect only one of the coils. An electronic control unit contains the hardware and software (firmware). Introducing Textbook Solutions. When a car is run at part throttle, this interruption in the airflow causes excess vacuum, which causes the engine to use up valuable energy acting as a vacuum pump. Technician A says the first step in the reprogramming procedure is to determine the current software needed. AC Delco 2134396 vs 1551107 - these are for sale at rockauto and not sure of the differences. 2- Which of the following statements about gap junctions is correct? Multicellular organisms tend to have larger genomes than unicellular organisms. B) The ECM is a tight and impermeable structure that does not allow for the flow of liquid. Using the correct tags will ensure you can find things more easily! ! History of ECM. Which One Of The Following Are Not Viable Therapeutic Strategies That Target Metastasis A. As the engine wears, the system may be less able to compensate compared to other designs. Some engines have variable valve timing. The main responsibility of this controller is to get information from sensors and run certain actuators. A full authority throttle control system may be used to control idle speed, provide cruise control functions and top speed limitation. Due to the large ramp up of volume of ECUs that were produced to meet the Clean Air Act requirements for 1981, only one ECU model could be built for the 1981 model year. By conventional machining the MRR reduces with an increase in the work material … (One or more may be correct). The fuel injection system has the major role of controlling the engine's fuel supply. In the early 1970s, the Japanese electronics industry began producing integrated circuits and microcontrollers for engine control in Japanese automobiles. C) Its primary function is nutrient storage. The engine RPM is monitored by the crankshaft position sensor which plays a primary role in the engine timing functions for fuel injection, spark events, and valve timing. 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