By A. Galip Ulsoy, Huei Peng, Melih Çakmakci
This engineering textbook is designed to introduce complex keep an eye on platforms for cars, together with complex automobile thoughts and the subsequent iteration of cars for ITS. for every automobile keep an eye on challenge thought of, the authors emphasize the physics and underlying rules at the back of the keep an eye on method thought and layout. this can be a thrilling and quickly constructing box for which many articles and studies exist yet no smooth unifying textual content. an in depth record of references is equipped on the finish of every bankruptcy for all of the subject matters coated. it really is presently the one textbook, together with difficulties and examples, that that covers and integrates the subjects of car powertrain regulate, automobile keep an eye on, and clever transportation structures. The emphasis is on basic techniques and techniques for car regulate structures, instead of the quickly altering particular applied sciences. the various textual content examples, in addition to the end-of-chapter difficulties, require using MATLAB and/or SIMULINK.
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Extra info for Automotive Control Systems
Maintaining consistent engine speed at idling despite load variations is important for perceived vehicle quality and to ensure low emissions and improved fuel economy. This control function requires measurement of the crankshaft angular position and engine speed. Transmission Control The main purpose of a transmission is to match the engine and vehicle speeds so that the engine can work in a more efficient region. ” Usually, a “shift map” with two independent variables is constructed, which then is used to determine up-shift and down-shift points.
In the next page of the notebook, the new engineer finds this equation: ˙ θ = kθ θ + k1 Pm m where kq is either (10/3) or −3. , 10/3 or −3) would you choose for kq ? 5 bar, m (b) Can you determine the constant k1 ? Finally, the linear function that defines the engine-pumping rate is found to be: N + k2 Pm 500 where N in RPM is the engine speed. Two sets of experiments were conducted to identify k2 . 9 bar and pumping rates of 50 and 10 g/s without pairing the pressure and pumping rate of each experiment.
2 Identifying the Control Requirements The high-level requirements specified for a vehicle can be general and abstract, as in the following examples: Based on customer feedback, design a control system so that the vehicle is durable with a pleasant driving feel and good fuel economy. Vehicle shall meet 100,000-mile life requirements. Today, part of a control engineer’s responsibility is to determine how overall vehicle requirements affect the control problem. This may include understanding and quantifying how the vehicle-life requirements affect the way that the automatic transmission shifts gears, the engine controller operates the engine, and the battery-control module manages battery power.