The computer requests more negative torque from the motor based on the position of the brake pedal. (Note only negative motor torque no possibility of hydraulics)Ģ.Ĝustomer notices the vehicle decelerates.ī. The computer requests negative torque from the motor based on the position of the brake pedal. (Note identical to above blended brake scenario)ī.
This displacement is read by a computer that interpolates how much deceleration the customer is requesting. Roughly speaking in drive in a city cycle ~1/3 of the total energy discharge is recovered through our regen/braking strategy.īolt EV brake system functionality (This is where it gets cool):Ī. The Bolt EV does not use “blended brakes” as the defined above. (Extreme tech people I know “only” is not totally accurate but please let it go on this one to get the point across) The only time the customer operates the hydraulic circuit directly is if they “push through” for fail safe operation. This displacement is read by a computer that interpolates how much deceleration the customer is requesting.ī.ĝepending on conditions a computer requests negative torque from the motor and/or applies hydraulic pressure to actuate the friction brakes.Ģ.Ĝustomer notices the vehicle deceleratesģ.Ĝustomer requests higher g decelerationī.ĝepending on conditions a computer requests more negative torque from the motor and/or applies hydraulic pressure to actuate the friction brakes.Ĥ. But I don’t know how else to clarify the confusion on ‘blended brakes’ topic.Ī conventional blended brake system functionality (underline highlights where a difference exists):ġ.Ĝustomer depresses brake pedal to achieve a low g decelerationĪ. To explain further I’ll need to risk going too techy. The Bolt EV offers a variety of driving modes (Drive/Low/RoD) to suit the customer’s desire. The simplest answer is the Bolt EV does not use the same braking system as the Volt.
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You are free to post Josh’s response on the forum, however, he tried to tweak it below to address some of your follow-up questions about the differences with Volt. But I'll B'dammed if I can now explain the differences between the Volt and Spark EV versus the Bolt's braking system. I got permission to post Josh Tavel's email response.
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