Sentences with phrase «lower compression ratio»

Mazda says the new diesel unit has a remarkably low compression ratio of 14.8:1 and a bespoke variable turbine geometry turbocharger.

In some vehicles with lower compression ratios, running a higher than prescribed octane may actually do more harm than good.

The 383 - cubic - inch Magnum engine was detuned to 300 horsepower by lowering the compression ratio for improved emissions.

By precisely controlling fuel injection and improving the exhaust valve's opening and closing mechanism, the SKYACTIV - D diesel engine has achieved breakthroughs to resolve longstanding issues encountered in low compression ratio engines, such as poor start capability and lower combustion stability when the engine is cold.

SkyActiv technology uses techniques such as direct injection, high compression ratios for petrol models (and low compression ratios in diesels), variable valve timing and special exhaust manifolds to improve efficiency and power.

Like the fuel - sipping Prius, the Atkinson cycle conserves fuel by lowering the compression ratio by keeping the intake valve open for a split second at the first of the combustion stroke.

[13] Differences from the LLT include a slightly lower compression ratio, 11.3:1, and lower power and torque peaks.

I think all but the most mildly turbocharged are intercooled and require lowering the compression ratio (CR).

All new Auris diesel engines benefit from low compression ratios, optimised combustion chamber dimensions and enhanced Exhaust Gas Recirculation (EGR) cooler efficiency.

The final drive ratio works seamlessly with the wide - range single - scroll turbocharger, allowing the engine to operate at lower compression ratios, and deliver the immediate acceleration to match the transforming, variable performance delivered by the VC - Turbo engine.

Low compression ratio for 67 octane kerosene was achieved by using turbo engine pistons.

Those increases are thanks to a slightly lower compression ratio, a redesigned turbo using a re-shaped impeller with fewer blades and more boost — a 2 psi bump from the Civic to 18.5 psi.

And diesel is starting to use a lower compression ratio, more like gasoline.

Having a larger engine to start of with (4litre vs 2.5 litre) and eight cylinders rather than four means 1) a lower compression ratio will effect driveability less and 2) more cylinders means more power strokes per engine rotation which will charge the turbo quicker creating boost quicker.

Off boost, the engines have lower compression ratios, resulting in lower thermal efficiency.

Why will a lower compression ratio engine push the compression gauge to a higher number than a high performance, high compression engine?

To achieve this, the engine runs more boost, and benefits from modifications to the turbocharger, a larger intercooler, new pistons that lower the compression ratio and a second cooling radiator.

SKYACTIV - D, the bigger news, is an optional 2.2 - liter twin - turbocharged diesel engine sporting the lowest compression ratio — 14:1 — of any diesel engine, with about 300 pound - feet of torque.

A low compression ratio of 14:1 minimizes peak cylinder pressures and reduces emissions, enabling the engine to meet regulations without the use of a urea after - treatment system.

In order to get the performance out of a purpose built turbo charged engine, you lower the compression ratio to allow the turbo to produce more boost with less fear of pre-detonation.

Then there's the tougher intake valves and seat rings, lower compression ratio, thicker cylinder head and larger twin - scroll turbocharger.

The engine will adopt a lower compression ratio under hard acceleration or heavy loads to allow the turbocharger to deliver maximum boost, and move to a higher compression ratio on light throttle to allow for fuel - efficient lean - burn running.

To optimize for regular fuel engine designers will lower the compression ratio to allow an increase in the spark advance to MBT.

The top of the piston has a unique bowl shape to achieve a lower compression ratio, optimal for this turbocharged application.

For the 105 - hp version, Renault engineers introduced a lower compression ratio (16:1) and a variable geometry, multi-blade turbocharger.

I have to wonder if they had to lower the compression ratio to avoid detonation under full boost which would hurt fuel economy at light loads.

With piezoelectric injector common - rail direct fuel injection that allows a lower compression ratio and with a VD (Variable Diffuser) / VG (Variable Geometry) turbocharger, the clean diesel unit delivers a maximum output of 150 kW (204 PS) and maximum torque of 420 Nm (42.8 kg - m).

This cam and rocker combination, combined with a low compression ratio of 8.4:1 advertised (7.9:1 actual) yielded 290 SAE net horsepower.

The new diesel engine is equipped with piezoelectric injector common - rail direct fuel injection that allows a lower compression ratio and a VD (Variable Diffuser) / VG (Variable Geometry) turbocharger.

This lowers the compression ratio to 8.1, but because the turbocharger kicks in at the same time, the engine's power output increases.

Mazda has altered the injection characteristics, injectors, utilised a variable valve lift to solve a misfiring problem, a lower compression ratio in order to reduce the weight of the engine and finally, and use a two - stage turbocharger.

Thanks to bigger twin - scroll turbos, lower compression ratio and unique cams it makes 520 hp at 6,000 rpm and 481 lb - ft of torque on a plateau that runs from 1,500 to 5,500 revs.

Also due to the low compression ratio, the SKYACTIV - D diesel engine also burns cleaner, discharging far fewer nitrous oxides while producing virtually no soot.

With its lower compression ratio, the Civic Si's maximum boost pressure has been elevated to 20.3 psi (from 16.5 psi in Civic EX-T), substantially increasing maximum horsepower and torque.

The new diesel is equipped with piezoelectric injector common - rail direct fuel injection that allows a lower compression ratio and a VD (Variable Diffuser) / VG (Variable Geometry) turbocharger.

[69] Compared to the prior Otto cycle system, the Atkinson cycle has a lower compression ratio, along with higher expansion ratio inside engine cylinders.

A low compression ratio allows for greater power and torque, and avoids knocking.

The transmission adjusts immediately under hard acceleration as the engine transforms to a lower compression ratio.

Typically, to avoid overheating, turbochargers have had to make do with a lower compression ratio.

The S3 model seen here features a pumped - up version of the 2.0 TFSI that has been thoroughly overhauled compared to the version available in the regular A3; among the beefed up components are the con rods, pistons and rings which quash a lower compression ratio of 9.3:1, the block and cylinder head castings, the valvetrain, and the turbocharger.

All three engines were detuned to lower compression ratios to use lead - free gasoline, and the horsepower ratings were lowered to reflect the more accurate Society of Automotive Engineers (SAE) net horsepower calculations.

Numerous combustion efficiency enhancing measures include a lower compression ratio, optimized combustion chamber dimensions, enhanced Exhaust Gas Recirculation (EGR) cooler efficiency and stainless steel exhaust manifolds with close - coupled Diesel Particulate Filters (DPF).

There is also a heavily reworked exhaust and lower compression ratio (15.8:1 vs. 16.5:1) compared to its predecessor.

・ 20 percent better fuel efficiency thanks to the low compression ratio of 14.0:1 ・ A new two - stage turbocharger realizes smooth and linear response from low to high engine speeds, and greatly increases low - and high - end torque (up to the 5,200 rpm rev limit) ・ Complies with global emissions regulations (Euro6 in Europe and the Post New Long - Term Regulations in Japan), without expensive NOx aftertreatment

Mazda's SKYACTIV - D race cars are unique because they have developed an engine with a low compression ratio that increases the fuel efficiency while keeping emissions low powered by diesel.

The Skyactiv diesel with twin turbochargers has a lower compression ratio than diesels usually do, the company says, of 14:1.