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Quick Summary (TL;DR) Semi-active suspension dynamically changes damper resistance to make it soft or hard based on sensor inputs. 1. The Core of Semi-Active Suspension Let’s lay down a simple truth: the entire point of a semi-active suspension system is to make the damper change between soft and hard in a smart way. Passive suspensions […]

By Johnny Liu, CEO at Dowway Vehicle Published on June 29, 2026 1. Introduction: The Shift in Vehicle Dynamics As smart cars grow rapidly, chassis control is moving past old mechanical limits. We have entered a new era of active, software-defined control. For decades, cars relied almost entirely on Front Wheel Steering (FWS). While functional,

Executive Summary Quick Takeaway: While standard SPICE tools like LTspice and PSpice work well for basic circuit checks, MATLAB Simulink (via Simscape) gives hardware engineers a major advantage: you can build custom models straight from datasheet parameters and run Hardware-in-the-Loop (HIL) testing. This guide walks you through setting up a simple Constant Current Source in

📌 Executive Summary (TL;DR) What is PMSM Stall Control? Under a locked-rotor (stall) condition, a Permanent Magnet Synchronous Motor (PMSM) has zero rotor speed ($n \approx 0$), resulting in zero mechanical output power ($P_{mech} \approx 0$). However, the electrical system remains highly active. Instead of “increasing current to push through,” a robust motor controller must

What is the real difference between multi-link and double wishbone suspension? Simply put, double wishbone suspension uses two triangular arms to clamp the wheel, offering excellent side-support and steering control, making it perfect for front wheels. Multi-link suspension uses three to five separate rods to guide the wheel, offering immense setup flexibility and cabin space,

About the Author I am Johnny Liu, the CEO of Dowway Vehicle. We build clean power drivetrains and smart vehicle dynamics. For over twenty years, I have worked on active car suspensions, drive-by-wire steering, and chassis safety. In our shop, we never build a physical part without testing it on a screen first. Simulink helps

Meet the Author Johnny Liu CEO at Dowway Vehicle With 15 years in car manufacturing and supply chain setup, Johnny leads Dowway Vehicle in building systems for next-generation electric vehicles. Published on: June 24, 2026 Reading Time: 8 minutes — For decades, global Tier-1 giants like Bosch, ZF, and Continental decided how cars were built.

Author: Johnny Liu Title: CEO at Dowway Vehicle Date: June 24, 2026 Category: Automotive Electronics / Functional Safety / Embedded Firmware Quick FAQ What is LBIST on the AURIX TC3xx? It is a hardware self-test that checks the microcontroller’s digital logic gates. It uses internal scan chains, runs pseudo-random test patterns, and creates a unique

By Johnny Liu CEO at Dowway Vehicle Published on June 23, 2026 in Shanghai, China Gears in heavy machinery or vehicle transmissions do not work under constant, uniform torque. Instead, they face sudden torque spikes, start-stop cycles, and unpredictable shifts. If you design a gearbox using only static peak-load calculations, you get one of two

Published on: June 22, 2026 Author: Johnny Liu, CEO at Dowway Vehicle Published On: June 23, 2026 Reading Time: 12 minutes Author’s Note “As the CEO of Dowway Vehicle, I have spent years tracking how mechanical limits constrain automotive engineering. What we are seeing in 2026 is a permanent shift in how vehicles move. The