Tri Glide Brake System 2019 & 2020

[Koolbreeze]

2019:

New Electronic Reflex Linked Brake System with Cornering Control Features

The all-new Reflex Linked Brake system for 2019 Harley-Davidson Tri Glide Ultra and Freewheeler^® three-wheeled motorcycles is fully electronic and utilizes the latest inertial measurement unit (IMU) and ABS sensor technology to enhance traction, stability and braking control in both a straight line and in corners. The Reflex Linked Brake system is designed to aid the rider in controlling the vehicle while accelerating, decelerating, and braking in a straight line, in adverse road conditions, and in emergency situations. It includes four key elements:

Traction Control (TCS)

Traction control system (TCS) is designed to prevent the rear wheels from excessive spinning under acceleration, which could occur on wet or slippery road surfaces or when abrupt acceleration is commanded by the rider. If the TCS detects that a rear wheel is losing traction under acceleration it will apply brake pressure to limit wheel spin.

Drag-Torque Slip Control System (DSCS)

Drag-torque slip control system (DSCS) is designed to prevent excessive rear wheel slip under deceleration, which typically occurs when the rider makes an abrupt down-shift gear change or decelerates on wet or slippery road surfaces. When DSCS detects excessive rear wheel slip under deceleration it will adjust engine torque delivery to better match rear-wheel speed to road speed.

ABS

ABS is designed to prevent the wheels from locking up under braking, with the goal of maximizing deceleration while maintaining straight-line stability when braking on wet or slippery road surfaces or over-braking due to an unexpected hazard. The ABS detects if wheels are approaching lock up under braking and if so, modulates the brake pressure to limit wheel slip.

Linked Braking

The Reflex Linked Brake System electronically links braking through both the front brake hand lever and the rear brake foot pedal. Linking will be active any time the brakes are applied and vehicle speed is above approximately 4.3 mph (7 kph mph). The brakes will remain linked as long as the rider continues to apply a brake control.

When the front or rear brake is actuated above approximately 4.3 mph (7 kph mph) the system applies a proportional amount of pressure to both brakes on the other axle. The amount of brake pressure applied to the other axle depends upon many factors including how hard the rider is applying the brake, the vehicle speed, and if the vehicle is turning. The amount of pressure electronically applied to the other axle is less than what a rider could apply directly with the linked axle’s lever or pedal.

The linked brakes are a rider aid, and do not replace proper braking techniques. The maximum vehicle deceleration on most surfaces is still reached by the rider applying both the front and rear brake controls.

A technical highlight of the system is its ability to measure lateral acceleration – the force the rider feels in turns – and adjust accordingly as that lateral force affects available traction. For example, the brake pressure required to limit wheel slip when cornering is typically lower than the pressure required under straight line operation, so when the system senses lateral acceleration that indicates the trike is cornering, the ABS response is adjusted accordingly. The action of Traction Control and linked braking also adjust based on lateral acceleration.

Source: https://www.harley-davidson.com/us/e...xperience.html

2020:

General information and discussion about the newest tech HD is offering. RDRS is much more than just traction control (see even more details in the link at the bottom). "Reflex™ Defensive Rider Systems (RDRS) is a new collection of technology designed to match motorcycle performance to available traction during acceleration, deceleration and braking. The systems are designed to aid the rider in controlling the vehicle while accelerating and braking in a straight line or while in a turn. A rider may find the systems most helpful when riding in adverse road conditions and in urgent situations. The systems are electronic and utilize the latest electronic brake controls and powertrain technology. The features of RDRS are bundled together except where noted. RDRS features are standard on all 2020 LiveWire™, CVO™, Police and Trike models and optional on all 2020 Touring models in the U.S. (except Electra Glide® Standard Model)."

1. ANTILOCK BRAKE SYSTEM (ABS)
   
   
   1. Anti-lock Brake System (ABS) is designed to prevent the wheels from locking under braking and helps the rider maintain control when braking in a straight-line, urgent situation.
      
   2. ABS is standard on MY20 LiveWire™, CVO™, Touring, Police, Trike and select Softail® models; and optional on all MY20 Street™, Sportster® and remaining Softail® models.
      
   
   
2. CORNERING ENHANCED ABS (C-ABS)
   
   
   1. Cornering Enhanced ABS (C-ABS) is a variant of ABS that is designed to balance braking and cornering loads at the tire contact patch while under combined cornering and braking.
      
   2. C-ABS is standard on MY20 LiveWire™, CVO™, Police and Trike models and optional on all MY20 Touring models in the U.S. (except FLHT)
      
   
   
3. ELECTRONIC LINKED BRAKING (ELB)
   
   
   1. Electronic Linked Braking (ELB) applies braking effort to both wheels when the rider uses either the hand lever (front) or foot pedal (rear) brake control, which can help riders achieve better braking performance.
      
   2. ELB is standard on all MY20 Touring and Trike models.
      
   
   
4. CORNERING ENHANCED ELECTRONIC LINKED BRAKING (C-ELB)
   
   
   1. Cornering Enhanced Electronic Linked Braking (C-ELB) takes into account the motorcycle lean angle or Trike lateral acceleration. C-ELB will alter the proportioning of brake pressure between the front and rear brakes when braking while cornering in an attempt to improve the ability of the motorcycle to maintain the rider’s intended path.
      
   2. C-ELB is standard on all MY20 CVO™, Police and Trike models and optional on all MY20 Touring models in the U.S. (except FLHT).
      
   
   
5. CORNERING ENHANCED TRACTION CONTROL SYSTEM (C-TCS)
   
   
   1. Traction control is designed to keep the rear wheel from "spinning out" when the motorcycle is accelerating while leaning, and enhances rider control and confidence, especially in wet weather.
      
   2. C-TCS is standard on all MY20 LiveWire™, CVO™, Police and Trike models and optional on all MY20 Touring models in the U.S. (except FLHT)
      
   
   
6. DRAG-TORQUE SLIP CONTROL SYSTEM (DSCS)
   
   
   1. Drag-Torque Slip Control (DSCS) is designed to reduce excessive rear-wheel slip under deceleration, which typically occurs when the rider makes an abrupt down-shift gear change or decelerates on wet or slippery road surfaces.
      
   2. DSCS is standard on all MY20 CVO™, Police and Trike models and optional on all MY20 Touring models in the U.S. (except FLHT).
      
   
   
7. CORNERING ENHANCED DRAG-TORQUE SLIP CONTROL SYSTEM (C-DSCS)
   
   
   1. On models equipped with C-DSCS the action of DSCS may be tailored when cornering, based on detected lean angle.
      
   2. C-DSCS is standard on all MY20 LiveWire™ models.
      
   
   
8. VEHICLE HOLD CONTROL (VHC)
   
   
   1. The primary function of VHC is to use brake pressure to keep the motorcycle from rolling, making it easier to ride away when starting on a hill, a bridge or a parking ramp.
      
   2. VHC is not intended as a substitute for a parking brake in any situation.
      
   3. This feature is standard on MY20 CVO™ and Police models and optional on all MY20 Touring models in the U.S. (except FLHT).
      
   
   
9. TIRE PRESSURE MONITORING SYSTEM (TPMS)
   
   
   1. TPMS alerts the rider to low tire air pressure. Maintaining proper tire air pressure is important both for vehicle performance and tire life.
      
   2. This feature is standard on MY20 CVO™ and Police models and optional on all MY20 Touring models in the U.S. (except FLHT).
      
   
   

(source: https://www.harley-davidson.com/us/e...er-system.html)

[Papa Zook]

Good information!