Purpose

I will try my best to provide detailed info on various cars and what is like to live with them, I have already produced a few for Jaguar-car-forums, I will do my best to be unbiased, but it will be hard for some cars. I will re-produce press releases and copy from other motoring news.
Showing posts with label Vehicle Dynamics Integrated Management system. Show all posts
Showing posts with label Vehicle Dynamics Integrated Management system. Show all posts

Wednesday, 3 December 2014

The Lexus RC F has been designed to be enjoyed by all driving enthusiasts.

  • High-performance coupe equipped with advanced drive and handling systems
  • Eight-speed Sports Direct Shift transmission with five selectable drive modes
  • New Sport and Expert modes added to Lexus’s Vehicle Dynamics Integrated Management
  • Torque Vectoring Differential
The Lexus RC F has been designed to be enjoyed by all driving enthusiasts, no matter what their level of expertise.

To this end, it is equipped with sophisticated, switchable technologies which allow instant modification of the powertrain steering and chassis to suit individual drivers’ abilities and any driving environment, from the everyday commute to a high-performance track day.


Drive Mode Select

The eight-speed Sports Direct Shift transmission offers a choice of five selectable operating modes: Eco, Normal, Sport S, Sport S+ and Snow.

Eco mode promotes environmentally responsible driving by controlling engine output, throttle opening and air conditioning settings to minimise fuel consumption. Engine response to accelerator inputs is automatically modulated and the air conditioning system’s compressor operation, airflow volume and recirculation function are adjusted for fuel efficiency.

Normal mode is the default Drive Mode Select setting, automatically engaged on vehicle start-up.

Sport S mode includes a new G-sensor AI-shift control, which uses information from the vehicle’s G-sensors to select the best gear ratio for high-performance sports driving. The transmission will automatically downshift during hard braking for a corner, hold a lower gear through the corner for greater control, and then select a suitable low gear on corner exit to give the driver greater throttle response.

Sport S+ mode builds on these sports driving benefits by performing quicker downshifts than Sport S and by consistently holding the engine at higher speeds. In addition, Sport S+ automatically adjusts the weighting of the electric power steering to better suit circuit driving conditions and activates the VDIM system’s new Sport mode.

The driver can also take manual control, moving the shift lever into M mode and using the paddle shifts or the lever to make sequential gearshifts. Up-changes are accomplished in just a tenth of a second, with throttle blipping control matching the engine speed to the gear selected.

VDIM with new Sport and Expert modes

The RC F is the first Lexus to feature a new Sport mode in its Vehicle Dynamics Integrated Management, and a new Expert mode, in which the system will only intervene to help prevent the vehicle going into a spin.

VDIM integrates the ABS, Vehicle Stability Control and traction control to provide proactive, seamless operation of the vehicle’s safety and stability systems. It anticipates any loss of traction and provides smooth control, from normal driving right up to the limits of performance.

In the RC F, VDIM has four modes: -
  • Normal, for smooth driving and a high degree of active safety under normal driving conditions.
  • Sport, to give priority to driver control. This mode offers greater safety and enjoyment when on a race track, applying optimum VSC/TRC mapping for circuit driving.
  • Off
  • Expert mode, which is designed to allow the driver to make full use of their driving skills in a similar fashion to VDIM Off mode, but with an extra layer of protection to prevent a spin.
Torque-Vectoring Differential

The RC F is available with a Torque Vectoring Differential (a standard feature on the RC F Carbon), a world-first application of torque-transfer type system in a front engine/rear-wheel drive vehicle.
The TVD has three switchable operating modes, independent of the transmission’s Drive Mode Select: -
  • Standard (default) for an ideal balance of agility and stability
  • Slalom, for an emphasis on nimble steering response and the agility of a smaller vehicle
  • Track, for an emphasis on stability during high-speed circuit driving
The Lexus TVD is unique in its use of precisely controlled multi-plate clutches to vector torque, rather than the vehicle’s ABS.

Electronic control and precision actuator motors, adjusted in units of one-thousandth of a second, ensure the appropriate amount of torque is distributed to each rear wheel.

The system has been designed to make best use of the vehicle’s yaw moment when turning, giving the feeling that the direction of travel and the direction of the vehicle are perfectly aligned. It enables the best possible torque transfer to be generated regardless of how great or small the engine torque is, creating a yaw moment around the car’s centre of gravity.

Vehicles fitted with the TVD have an exclusive final drive unit and TVD ECU, which calculates the amount of torque to be transferred and provides co-operative control with other systems, including the VDIM.
The RC F is available to order now, priced from £59,995. First customer deliveries will be in February.

Wednesday, 26 November 2014

The Lexus RC F, High Performance coupe, the car to be seen in, coming your way, sooner than you think.

The new Lexus RC F is a high-performance coupe with a difference. From the outset it has been designed to reward drivers of all abilities, whether you’re an experienced track driver or an enthusiast who loves the open road.

This versatile character does not mean compromise: the new performance pinnacle of the Lexus range is true to its “F” designation as a powerful and technically advanced machine that has been honed on race circuits around the world. The F denotes Fuji Speedway, the Japanese track where Lexus carries out much of its high-speed product testing.

Yukihiko Yaguchi, the RC F’s chief engineer, explains: “There’s a perception that many high-performance cars are hard to drive. In fact they’re easy in the right hands because they’ve been purpose-built for the skill level of their drivers. It’s the same with the RC F, which I have built to be enjoyed by all enthusiasts, no matter what their level of expertise. 

Electronics can be modified instantly on board to provide performance and protection appropriate to each driver’s abilities. But even in its basic settings, it’s a blast.”


The key ingredients are a new 5.0-litre V8 engine delivering 471bhp and 530Nm of torque, and a significantly upgraded eight-speed Sports Direct Shift transmission that gives the driver a choice of five operating modes, from fuel-efficient Eco to full-blooded Sport S+, plus an option to switch to manual, sequential shift control. 

Lexus has also revised the Vehicle Dynamics Integrated Management system with new Sport and Expert settings that let the driver safely exploit the car’s full performance capabilities.

The RC F is the most powerful V8 road car Lexus has yet produced. In raw figures, it covers 0-62mph in 4.5 seconds and can reach an electronically governed top speed of 168mph. 

That’s only a fraction of the story, however, as the coupe has been engineered to deliver exceptional grip, agility and high-speed stability with chassis, brakes, steering and suspension all specifically designed and tuned for purpose. The handling package includes and active rear wing and the availability of a Torque Vectoring Differential, technology that’s featured for the first time on a front engine/rear-wheel drive car.

The RC F’s capabilities will be further emphasised by its participation next year in GT3 sportscar competition. Race teams worldwide have been registering interest the car, developed by Lexus International and its subsidiary Technocraft with a more powerful engine, stripped-out interior and high-downforce/low drag bodywork.

The RC F demonstrates Lexus applying many of the ideas and technologies it originally developed for the LFA supercar, including the use of carbon fibre technology for lightweight bodywork elements, clever instrumentation that automatically changes display with different driving modes and a stirring engine note, project into the cabin through an Active Sound Control system.

Unlike the rare and highly exclusive LFA, the RC F will be widely available. In the UK two versions are on offer: the RC F (£59,995) and the RC F Carbon (£67,995), which comes with the Torque Vectoring Differential and Carbon Fibre Reinforced Plastic composite bonnet, roof and rear spoiler as standard.

Order books are open now with customer deliveries from January 2015.