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Advanced System Requirements for Automotive Automation
Published in P. Sivakumar, B. Vinoth Kumar, R. S. Sandhya Devi, Software Engineering for Automotive Systems, 2022
M. Manohar, H. Suneeta, S. Harlapur
The CAN transport is utilized in vehicles to associate motor control unit and transmission, or to interface the entryway locks, atmosphere control, seat control, and so on (Devi, R. S., Sivakumar, P., & Sukanya, M. 2018). It is asynchronous multiace correspondence convention sequential transport having information pace of up to 1 Mbps. Examples of CAN bus application: Safety power train: Electronic parking brake, vacuum leak detection automotive black box.Chassis: Watchdog, motor control, electronic throttle control body control: low-end body regulator (lighting, network communication) power door, power sunroof, power lift gate.Flex-ray organize.
Practical diagnostics
Published in Tom Denton, Advanced Automotive Fault Diagnosis, 2020
Our customer reports the following messages appear within the instrument panel: Parking Brake Malfunction, Start/Stop system deactivated. Further questioning of the customer revealed that the electronic parking brake (EPB) in the vehicle occasionally failed to release after being engaged overnight. When the fault occurs, the vehicle can be driven without any brake binding or drag, suggesting the parking brake has released. The symptom had been very intermittent for over 12 months regardless of temperature or driving conditions. Additional feedback from the customer added that if the ignition was turned off and back on, the error messages would clear, and the parking brake released as normal. However, occasionally the ignition was required to be turned off for over 20 minutes before the parking brake function was restored.
Chassis systems
Published in Tom Denton, Automobile Mechanical and Electrical Systems, 2018
The electric (or electronic) parking brake (EPB), also known as an automatic parking brake (APB), is a function offering the driver increased comfort and convenience. In addition, as the hand lever is not used, car manufacturers have more freedom of choice as to where they site the operating parts within the car. Features such as hill- or auto-hold are also possible with an EPB. Hill-hold stops the car rolling away accidentally when standing still or setting off. Auto-hold keeps the brake pressure applied after the driver releases the pedal. If the ABS sensors detect any movement the pressure is increased. If the accelerator is pressed (or the clutch released on a manual) the brakes are let off.
Design and feasibility analysis of a novel auto hold system in hydrostatic transmission wheeled vehicle
Published in Automatika, 2020
Lv Chang, Jianguo Dai, Shuo Liu
Currently, common auto hold systems of vehicle mainly include mechanical electronic braking system, hydraulic electronic braking system, pneumatic electronic braking system and so on [7]. Compared with the conventional hand braking system, mechanical electronic parking brake system eliminates hand brake lever and other unnecessary components, which reduces space for braking system and lowers manufacturing cost. Hydraulic or pneumatic electronic braking system adopts electronic control modules on the basis of mechanical electronic braking system [8–10]. The auto hold systems mentioned above are consisted of a large number of components and require independent braking system and circuit control system, which are limited by high cost, complex structure and inconvenience in post-maintenance.