Autovolt Magazine

Chief Engineer Chika Kako Explains How Lexus Created the New CT 200h

Lexus chief engineer Chika Kako shares her insights into the development that went into the new CT 200h as the first UK customers get to discover for themselves what improvements have been made.

Kako is Lexus International’s first female chief engineer and took up responsibility for the CT 200h in June last year. She brings to the job extensive experience within Toyota and Lexus, including work on the RX and IS model ranges. She said:

“When it came to the engineering priorities for the new CT 200h, we wanted to have the best balance between ride comfort and dynamic performance. It was also important – especially for the European market – to reduce CO2 emissions.”

Chief Engineer Chika Kako with a Fuji Red CT 200h F Sport

These goals were realised by increasing body rigidity, notably by significantly increasing the number of weld points around the tailgate, adjusting the springs and dampers and retuning the steering for smoother feel and greater responsiveness. Adjustments to the aerodynamics have helped the full hybrid powertrain deliver even greater efficiency, with CO2 levels cut across the board, ranging from just 82 to 88g/km across the range. Kako said:

“In all we made 94 separate changes to the car, which for a mid-life programme represents a huge effort.”

She explained that Lexus listened to customer feedback when planning the new model programme, including concerns about the relationship between sound generated by the transmission and the engine speed. Kako explained:

“Some customers commented about the noise made by the CVT. To solve this we defined the best balance between powertrain noise and vehicle speed to create a more linear feel when moving through the rev range. Eliminating noise from the transmission and striking the right balance in making the car fun to drive and comfortable have delivered a better driving experience than before. I think we have succeeded in making the handling sportier, yet with a more comfortable ride.”

Kako also highlights measures that have raised quality in the cabin and introduced new on-board technology.

“We took steps to improve visual refinement, which you can see in details such as the way leather is used around the gearshift and new trim details. Making the cabin quieter adds to the perceived quality, along with a sportier exhaust note.”

Kako picks out the new, sharper looks of the F Sport model, which give it greater differentiation from the rest of the range, and the improved handling as the changes she thinks are most successful. She also emphasises the importance of distinctive design.

“We have developed a very strong, iconic exterior design language for our cars, a process that began with the GS and continues with the new CT 200h. Making our cars more stylish and more fun to drive is what we’re aiming to achieve, while for me my biggest  passion is to create a cool interior with innovative solutions and a warm atmosphere.”

CT 200h Advance in Mercury Grey

Source; Lexus