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YZF-R1 ELECTRONIC CONTROLS
Every racer and track rider is always searching for total
control. Because with total control comes higher
cornering speeds, lower lap times, increased levels
of excitement and reduced rider stress.
The all-new YZF-R1 comes with the most advanced electronic
control technology ever seen on a production
motorcycle, an accordingly it offers its rider the
chance to attain their true potential.
No longer is mechanical superiority enough to stay at the top.
The digital era has arrived, and with its total 3D
controllability, the new YZF-R1 makes the impossible
possible. We R1.
6-axis Inertial Measurement Unit (IMU)
For the first time on any production motorcycle, the new R1 is
equipped with a highly sophisticated 6-axis Inertial
Measurement Unit (IMU) that instantaneously delivers
comprehensive machine running data to the ECU.
Developed exclusively for the new R1, this 6-axis IMU consists
of three gyro sensors that measures machine pitch,
roll and yaw, as well as three G-sensors that
transmits data on forward/backward, left/right and
up/down acceleration. By constantly analysing this
data 125 times per second, the IMU is able to
establish the R1’s position and behaviour –
including lean angle, slide speed and pitching rate.
Data is then sent via a CAN system (Controller Area
Network) to the ECU that makes real time
calculations and instantly adjusts the R1’s various
electronic control systems in order to achieve
optimum performance with high levels of
controllability.
The significance of the 6-axis IMU is not limited to its
ability to give precision control via the ECU to
adjust the fuel injection volume, ignition timing
and throttle valve opening. What makes this
technology so ground-breaking is its ability to
deliver precise data on every aspect of running
machine attitude, and this in turn has enabled
Yamaha to equip this new superbike with the most
advanced MotoGP technology, such as a banking angle
sensitive rear wheel Slide Control System (SCS) and
Traction Control System (TCS).
For the first time ever, racers and track riders have access
to a race-ready production motorcycle that, through
the use of the advanced electronic control systems
described in the next section, enables every rider
to attain their full potential on the track.
New banking angle sensitive Traction Control System (TCS)
One of the advanced new control technologies that has been
made possible by the use of the 6-axis Inertial
Measurement Unit (IMU) is a newly developed Traction
Control System (TCS) that takes account of banking
angle when controlling rear wheel drive force.
TCS is able to optimize the drive force to the rear tyre by
monitoring the difference in speed between the front
and rear wheels, and if it detects that rear wheel
traction is being lost, the ECU adjusts the throttle
valve opening, fuelling and ignition timing
accordingly.
The R1’s newly developed TCS takes the concept to the next
level by using additional data relating to the
bike’s banking angle when calculating the optimum
rear wheel control settings. For example, when the
R1 is cornering at a high banking angle, the IMU’s
sensors will activate the TCS to a higher level of
control than when the motorcycle is upright -
allowing the R1 rider to achieve optimum performance
on a circuit, or whether powering out of a corner or
accelerating in a straight line.
Slide Control System (SCS)
Just two years after introducing the technology on our MotoGP
bikes, Yamaha is making history by offering our
customers the opportunity to experience the most
sophisticated electronic control technology
available on a production motorcycle.
Using data from the revolutionary new 6-axis IMU, Yamaha’s
patented Slide Control System (SCS) is designed to
limit sidewards movement of the rear tyre by
adjusting the engine’s output to an optimal level
via the ECU when a slide is detected. This advanced
new system works in association with the new banking
angle sensitive TCS, and this high level of
electronic control enables riders raise their game.
Front LIFt control system (LIF)
The third weapon in the R1’s control armory is its LIFt
control system (LIF) that has been developed to
control front wheel lift when accelerating hard.
Once again, this use of this electronic control
system has been made possible by the installation of
the 6-axis IMU, and, the new LIF helps achieve a
higher level of machine control for reduced lap
times.
Launch Control System (LCS)
For fast, smooth and efficient starts, the Launch Control
System (LCS) restricts engine rpm to below 10,000rpm
even at full throttle. This control system also uses
information from the TCS and LIF systems in order to
maintain an optimum level of engine output when
accelerating away from the start line, allowing the
rider to concentrate fully on the crucial first few
seconds of any race.
Quick Shift System (QSS)
Racers and track day riders will benefit greatly from the
6-axis IMU, TCS, SCS, LIF and LCS - and another
significant piece of electronic control technology
that is designed to reaffirm the R1’s race ready
specification is its Quick Shift System (QSS). A
sensor on the shift lever rod detects when the rider
is upshifting, and the QSS sends data to the ECU
that cuts drive torque to the engaged gear for
swifter gear shifting.
Power mode selection (PWR)
The newly developed Power mode selection (PWR) gives the
professional racer and track day rider the option to
choose from a selection of four different adjustable
running modes. This new PWR system is a further
development of the proven Yamaha D-MODE system, and
the four different control maps regulate the R1’s
throttle valve opening in relation to the throttle
position.
Yamaha Ride Control system (YRC)
The new R1 comes with a Yamaha Ride Control system (YRC). The
YRC offers 4 grouped presets for quick and simple
‘one-click’ selection of all electronic controls
through easy handlebar switches. In the YRC each of
the control modes can be freely adjusted into new combinations
based on user preferences and riding environment.
Optional Communication Control Unit (CCU)
YZF-R1 customers looking for the ultimate package can specify
the fitment of the optional CCU. Full information is
given in the YZF-R1M section.
Digital instrument panel with Thin Film Transistor (TFT) LCD
design
With its wide array of electronic controls, the new R1
produces a mass of information, and Yamaha have
developed an effective new rider-machine interface
that conveys the data in a clear and intuitive
manner. The rectangular single screen is 109mm wide,
and is constructed using a Thin Film Transistor (TFT)
liquid crystal display that significantly reduces
reflectivity to give a clearer view of the
information.
To achieve a high definition colour display, the LCD uses a
very small dot size that gives the bar-type
tachometer, acceleration meter and brake pressure
display a solid and easy to read appearance – and
the panel can be set to either ‘Street’ or ‘Track’
mode with a choice of a black or white background,
depending on the situation. In addition, there’s
also an ambient light brightness sensor that
automatically adjusts the panel’s backlighting level
to suit the prevailing conditions.
In ‘Street’ mode the display features items such as gear
position, while the tachometer bar display uses
different colours as the revs increase, allowing the
rider to instantly comprehend the data. Other items
available in ‘Street’ mode include odometer,
tripmeters, real-time fuel efficiency, average fuel
efficiency and amount of fuel consumed. Icons at the
top and bottom of the display also show whether
specific control functions such as the TCS and SCS
are switched on, and which power mode is selected.
In ‘Track’ mode the display shows specific information with a
high degree of clarity, such as lap number, lap
times and a stopwatch function. The bar type
tachometer display starts at 8000rpm and runs to the
red line, and the gear
position indicator is prominently displayed to the right of
the panel. For easy post race analysis, each display
has a memory function that enables lap by lap
analysis.
YZF-R1 DESIGN
YZR-M1 inspired
In 2013 Yamaha Motor re-affirmed ‘design excellence’ as one of
the key elements in new product creation, and
defined the company’s design vision for the future
as ‘Refined Dynamism’.
A side view that expresses light weight, slimness and
compactness
One of the most striking design features of the new R1 is the
compact surface area when viewed from the side. The
use of a low set fuel tank and a short nosed,
low-set front cowling - combined with a large open
space under the seat - form a silhouette that is
markedly smaller than the current model. Other
significant design features that accentuate the R1’s
light and compact side view are its short 1,405mm
wheelbase, as well as the use of the
centrally-located mid-ship muffler.
The overall feeling of lightness is also enhanced by the new
cowling’s ‘cross-layered wing’ design that has
layers of bodywork smoothly interlocking with each
other. There are also large outlets in the side cowl
and undercowl that expose various elements of the
engine and inner aerodynamics to accentuate both the
lightness of the new R1 and its high-tech design.
Pure YZR-M1 racer DNA with rider-machine unity
The body design of the new R1 has been shaped by the demands
of the racetrack, and for this reason we have used
Yamaha’s winning MotoGP bike as our inspiration.
With its central air duct and high, broad-shouldered
front cowl and screen - as well as large outlets in
the side cowling - the YZR-M1’s influence on the new
R1’s body design is unmistakable.
Achieving rider-machine unity is crucial for success on the
race circuit, and every element of the body design
has been developed with this goal at the forefront
of our designers’ minds. The low-set fuel tank with
its highly indented knee pockets enables the rider
to sit ‘in’ the new R1 and take full control – and
the wide seat gives greater freedom of movement
during cornering and braking.
New face design with a ‘headlight-less’ look
One of the most revolutionary design features on the new R1 is
its radical new face with a unique ‘headlight-less’
look. In place of the usual twin headlights, this
front cowl is equipped with thin and straight LED
position lights, while the compact new LED
headlights are located within the leading edge of
the side cowling. This exclusive design gives the
2015 YZF-R1 a ‘race-ready’ expression that confirms
its circuit-focused character and M1 race-bike DNA.
Aerodynamic and lightweight body components
Wherever any external component sits in the airflow – such as
mirrors and tail – they have been designed to be
aerodynamically efficient, and this not only helps
to reduce drag, it also reinforces the feeling of
speed and lightness of the new R1. Special attention
has been paid to the design of the rear cowl so that
it draws air into the machine, and other features -
such as engine covers, footrests and the ABS sensor
cover - feature lightweight ribbed designs that
reinforce the R1’s powerful image and reduce weight.
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