Environmental Technology

Daihatsu is aiming for vehicle-making that is environmentally friendly and has lower maintenance costs for vehicles, as they are important for our daily lives, work, and lifestyles.

Reducing the Amount of Gasoline Consumed

Engine for mini vehicles that consumes gasoline efficiently and has minimal energy loss

KF NA Engine(Mira e:S)

A 660cc KF model gasoline engine that combines excellent power, low fuel consumption, low emissions, and quiet operation. It features improved combustion efficiency and minimized mechanical loss, to improve fuel efficiency. Using the electronic throttle, drivers can gain precise and responsive control of the engine and CVT, further improving fuel efficiency.

CVT that Effectively Transfers Power from the Engine

CVT(Mira e:S)

The CVT has been improved by adopting Daihatsu's unique input reduction system 3-axis gear train. Power transfer has been improved by using a high-efficiency oil pump and lowering the CVT control pressure. In addition, the load on the engine has been reduced by optimizing (high-gearing) the conversion gear ratios based on reduction of rolling resistance and vehicle weight. Furthermore, weight has been reduced by thinning the CVT case and making the oil pump cover and planetary gear from aluminum.

Reducing Gasoline Consumption during Idling

"eco IDLE" with Idling Stop Function

Boon eco IDLE

The Boon features an idling stop function. Fuel efficiency has been improved by increasing the idling stop time, which stops the engine when the brake is pressed and speed drops below a certain level.

First Malaysian National Car Fitted with "eco IDLE"

Malaysia Bezza

"Bezza" is the first Malaysian national car to use "eco IDLE" (an idling stop system), which has a long track record in compact cars in Japan. It has been recognized as having the best*1 fuel efficiency of gasoline cars in Malaysia, and conforms to the national governments Energy Efficient Vehicle (EEV) policy.

*1: As of July 22, 2016

Lighter Vehicles to Drive Using Less Power

Adopted Light-weight Resin instead of Steel Plate for External Parts


Sections using resin parts

Daihatsu is making vehicles lightweight by increasing the use of resin for body parts. Based on tests of resin parts in various temperature conditions to investigate distortion conditions, Daihatsu has developed a processing method and material selection process reflecting the requirements for optimization of each part.

Adopted a Lightweight Resin Fuel Tank

Copen Resin fuel tank

The weight of the resin fuel tank has been lightened by giving it a uniform thickness. Meanwhile, the use of diamond beads ensure it is both rigid and shock absorbent.

Pursuit of a Waste-free Body Form

Mira e:S Body frame structure

Daihatsu reduced the weight of the Mira e:S without reducing the overall length by reviewing the placement of frame materials, reducing reinforcing materials by making parts as straight as possible, and using high-tensile strength steel.

Reducing Gasoline Consumption when the Car is Generating Electricity

Uses Electricity Generated during Deceleration and Reduces Electricity Consumption

Mira e:S Deceleration energy regeneration function

Mira e: S LED rear combination lamp

The regeneration function has been improved so the alternator converts kinetic energy during deceleration and stores it in a battery. This improvement has increased the amount of electricity generated by the alternator during deceleration. The lead battery can also more easily take in energy and has an increased storage capacity. This reduces the amount of electricity generated by the alternator during normal driving and when accelerating, which reduces the load on the engine.

Reducing External Resistance Affecting the Car during Driving

Reduced Air Resistance and Rolling Resistance

Mira e:S Aerodynamic test

Air resistance has been reduced by performing CAE simulations and wind tunnel experiments from the design phase, using this information to improve the forms of front corners and reducing the under-floor flow.
In addition, rolling resistance has been reduced through improvements to driving parts and the tires.

※Note: Above is the proto-type photo so the specifications may differ from the current sales model

Related content