To start the engine, a heavy-duty 3 phase AC generator/alternator system was very prevalent in earlier vehicles. In either case, it is imperative that the transmission retain some pressure on the forward clutch when the engine is in auto-stop mode, or a flare will occur when the customer accelerates the vehicle. One system uses an electrically-operated auxiliary transmission fluid pump (Figure 3) to keep the clutches engaged, while the other system uses a hydraulic accumulator (Figure 4). To keep the transmission engaged when auto stop is active, two different systems are used. Other vehicles utilize a heavy-duty starter that engages to provide the auto-start feature.
Some vehicles use a heavy-duty generator/alternator that acts to spin the engine over for auto start. Two different systems are used to restart the engine, depending on the vehicle’s year and make. Many vehicles also incorporate a hill-hold, or “auto stop,” to keep the car stationary while on a grade (figure 2). Other systems may include a coolant pump to circulate coolant through your heater core when the engine is off, and a control, such as a button on the dash (figure 1) to turn the system on and off for the duration of the key cycle and indicator in the dash telling the customer when the auto stop feature is active. The start-stop system consists of two main systems: a system to restart the engine and a system to keep the transmission engaged when the engine is off. The transmission is one of the main components in all hybrid systems, so even though you may prefer not to work on the system, you will be required to.
2018 equinox auto stop turn off install#
But since the system is classified as part of the vehicle emission controls, your local dealer is unable to install a calibration to disable its operation. Many customers, including myself, are annoyed by the operation of most systems and would gladly pay to have someone disable it. The vehicle operates normally until you make another stop. When the customer accelerates, the engine starts automatically. Start-Stop systems shut the engine off when the vehicle comes to a stop. The vast majority of the manufacturers use a start-stop system, and most of them are similar in operation. Different levels of hybrid systems are used, from a mild hybrid that uses “start-stop” technology to the full-blown hybrid, which uses the hybrid system to supplement the internal combustion engine during acceleration, typically referred to as “E Assist.” According to studies, the auto/start-stop accounts for a 4-5% increase in fuel economy depending on the driving conditions. Hybrid systems are commonplace worldwide. Hybrid and electric drive vehicles are an attempt by the manufacturers to satisfy the friendly folks’ requirements in Washington DC. Consequently, manufactures are always looking to technology to help them meet their goals. Manufactures that fall short in either of those requirements may face fines. The government requires and monitors automotive and truck manufacturers to improve fuel economy and reduce emissions. It seems as time marches on, more and more of what we do is driven by government rules and regulations.
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