[redneck]

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That 0.8L Suzuki diesel is the cat’s meow.

https://www.wardsauto.com/miscellane...n-sheet-diesel

The engineers were tasked with developing a low-maintenance engine with high fuel efficiency, compliant with current and future emissions standards and able to fit in Suzuki’s full range of small cars.


They responded with a powerplant making 48 hp, 92 lb.-ft. (125 Nm) of torque at 2,000 rpm and delivering fuel economy of 64.9 mpg (3.6 L/100 km), which Maruti Suzuki claims is the Indian market’s highest.

The diesel weighs just 198 lbs. (90 kg), achieved by using an aluminum engine block and lightweight components. A counterbalance shaft normally would be needed to curtail noise from the block, but that would have increased the overall size of the engine. The solution was to increase the height of the block.

To curb vibration, the engineers chose a compression ratio of 15.1:1 instead of the usual 16.5:1. To compensate for the power deficiency resulting from the lower compression, two fixed-geometry turbochargers were used in place of a costlier variable-geometry turbo. This achieved comparable performance within the available budget and size of the engine block.

Supplier Bosch helped in replacing a common-rail fuel-injection system and air-to-air intercooler by developing a reservoir of air, again saving both space and money. A double camshaft with 2-valve arrangement was used in place of a single cam, and a high-pressure fuel pump meters fuel injected into each cylinder.

A belt drive for camshaft is relatively quiet, but wear and tear is high and frequent replacement is required. The engineers instead adopted a chain drive that requires more lubrication but uses less-expensive, more effective mineral oil in place of synthetic oil.

To contain costs, 97% of the DDisS125’s parts were locally sourced.

“We have developed a compact engine with excellent fuel economy,” says C V Raman, executive director-design development and engineering for Maruti Suzuki. “It was tough to meet the requirements of containing emissions (and) noise, vibration and harshness – but we have met them. We have made the small car fuel-efficient with a green engine. And there is no lack of power.”

It will never see the light of day in the U.S.A.




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