Su­per sys­tems

Mazda is pre­view­ing its new build­ing blocks, writes Neil Dowl­ing

Herald Sun - Motoring - - Prestige -

RAD­I­CAL new en­gines and trans­mis­sions will change Mazda’s place in the car world and form build­ing blocks for its fu­ture.

With its new ‘‘one size fits all’’ phi­los­o­phy, Mazda re­veals that next year it will make a sin­gle ve­hi­cle plat­form to suit dif­fer­ent mod­els.

At its first show­ing in Ber­lin, Mazda pre­viewed its new diesel and petrol en­gines, new au­to­matic and man­ual trans­mis­sions and sev­eral new chas­sis sys­tems.

Though shown in old Mazda6 bod­ies, the driv­e­trains will be seen — as early as next year in Aus­tralia— in the com­ing Mazda3, Mazda6, SUVs, com­mer­cial ve­hi­cles and, later, in the Mazda2.

Mazda has also re­vealed it has achieved fuel con­sump­tion as low as 5.8 litres/ 100km from a nor­mally as­pi­rated 2-litre petrol four and 4.2 litres/100km from its new 2.2-litre bi-turbo diesel.

Also, the en­gines will meet fu­ture strict emis­sion reg­u­la­tions, in­clud­ing Euro 6.

So here’s what’s new.

En­gines

MAZDA has rolled out its Sky-G (petrol) and Sky-D (diesel) en­gine range.

Tech­ni­cally, they rep­re­sent a fresh wave of in­ter­nal com­bus­tion en­gine devel­op­ment. For ex­am­ple, a diesel usu­ally has a very high com­pres­sion ra­tio of about 20:1, but Sky-D has an un­usu­ally low 14:1.

The Sky-G also has 14:1, when nor­mally as­pi­rated petrol en­gines are about 10:1.

Pow­er­train devel­op­ment di­vi­sion head Mit­suo Hit­omi says by rais­ing the com­pres­sion ra­tio and con­trol­ling cylin­der head tem­per­a­tures, it’s pos­si­ble to re­duce fuel use.

A side ben­e­fit — aided by a high­per­for­mance four-into-two-into-one ex­haust sys­tem and long-stroke cylin­der de­sign — is a 15 per cent in­crease in torque.

The longer stro­ker/smaller bore al­lows the cylin­ders to be placed closer and the en­gine block to be 20mm shorter and lighter.

Sky-G is a 2-litre en­gine, but Mazda is fi­nal­is­ing a 1.3-litre ver­sion that is in­tended for the Mazda2. A smaller diesel is also be­ing de­vel­oped.

Both diesel and petrol en­gines — and man­ual and au­to­matic trans­mis­sions — come with Mazda’s ‘‘i-stop’’ stop-start sys­tem.

Trans­mis­sions

THERE are four trans­mis­sions branded Sky-Drive: six-speed man­u­als and six-speed au­to­mat­ics for petrol and diesel ap­pli­ca­tions.

The big story is the lock-up sys­tem for all cars that Mazda claims al­lows up to 7 per cent fuel sav­ings, while de­liv­er­ing rapid shifts.

Mazda is con­sid­er­ing pad­dle shifters in some au­to­matic mod­els and even a ‘‘sports’’ shift but­ton to ac­cen­tu­ate shift points.

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