Sentences with phrase «higher compression ratios»

The Direct Injection Gasoline (DIG) system improves combustion efficiency and performance, and enables the engine to avoid knocking at higher compression ratios, while the multi-point injection mixes fuel and air earlier, enabling complete combustion in the chamber for greater efficiency at low engine loads.

Indeed, higher compression ratios and other aspects of the working diesel mean that the engines must be built to a more heavy - duty standard.

They accept that higher - octane fuels will allow us to use higher compression ratios to improve combustion efficiency.

From our side, I think the number - one move to allow higher compression ratios will be the development of water injection to reduce combustion temperatures — it's all about controlling knock or pre-ignition.

I always assumed that the less «square» (or more «undersquare») a motorcycle engine was, the higher the compression ratios it can have.

As far as I know premium fuel is (or was) better suited for engines with higher compression ratios (10:1 or more), since lower octane fuel is more likely to combust before the sparkplug fires.

Diesel engines have a higher compression ratio than gasoline ones do, and more compression means more power out of the same amount of fuel, she said.

Highly turbocharged alcohol - fueled direct - injection spark - ignition (DISI) engines operated at a high compression ratio could be as or more efficient than diesel engines while also providing advantages of lower vehicle cost, lower emissions and higher power, according to a recent modeling study by Leslie Bromberg and Daniel Cohn at MIT.

My assumption is that it probably has to do with the higher compression ratio of the Diesel engine.

If you have a high - performance engine with a high compression ratio or a big turbocharger, often a high - octane fuel is recommended (or even required) in order to produce the maximum amount of power.

@Ukko I agree that the ratio reported is generally not the boosted ratio, I believe the ratio will change when under boost since the amount of air in the cylinder will be greater before compression, hence higher compression ratio.

Kia has enhanced the 164 - hp engine with direct injection and a higher compression ratio.

It uses DOHC valves and a high compression ratio.

The new Skyactiv 2.0 - liter takes advantage of direct injection, a high compression ratio, and weight reduction to help the compact 3 hit that all - important 40 mpg number.

Direct injection is employed, as is variable valve timing, a high compression ratio, redesigned fuel injectors, and reshaped piston cavities; the automatic transmission optimizes the use of its lockup torque converter; both transmissions and the engine are fractionally lighter.

The higher the compression ratio, the colder the spark plug needs to be.

The 1.6 - litre four - pot, lifted from the third generation Renault Clio, was uprated with more aggressive cams, a higher compression ratio and a revised intake and exhaust.

Toyota's new 1.5 - litre in the Yaris follows similar themes to Mazda's Skyactiv units - a higher compression ratio, clever valve timing, and in Toyota's case, a water - cooled exhaust manifold that removes the need for a richer mixture at cruising speeds to keep combustion temperatures low.

The GTO's quad - cam V - 12 produces 661 hp thanks to reduced friction, a higher compression ratio, and improved breathing.

With the piston which is slightly domed, you'll have a slightly higher compression ratio.

supposedly the higher the compression ratio, the higher the octane your fuel should be.

The V - 6, like last year's, displaces 3.0 liters, but thanks to a revised intake system and a higher compression ratio, horsepower increases from 200 to 240.

To achieve the higher compression ratio a longer stroke is required.

(244 Nm) of torque but has several updates, including a higher compression ratio (10.5:1 vs. 9.5:1), «reduction in turbocharger inertia,» with a lower maximum torque peak (1,600 rpm vs. 2,000 rpm); and the addition of a low - pressure exhaust - gas - recirculation system, the latter lowering exhaust - gas temperature and improving knock sensitivity, Nissan says.

It can then be put in diesel engines and will ignite properly because diesel engines have high compression ratios, so why can't this be done?

For 2009, it gets variable cam timing, a higher compression ratio, and two spark plugs per cylinder, boosting output to 372/376 hp and 401/410 lb - ft of torque (with the automatic / manual transmission).

The smaller that space, the higher the compression ratio, even when bore and stroke is the same.

With a much higher compression ratio (13.5:1 versus 12.3:1), freer - flowing intake and exhaust, and more aggressive cams, it produces 80 additional horsepower for a total of 731 hp at 8250 rpm and 509 lb - ft at 6000 rpm.

In addition, the cooling effect of gasoline droplets changing to vapor inside the combustion chamber facilitates a higher compression ratio without incurring detonation.

Not only will this reduce the use of fossil fuels, but the higher purity fuels made in this way can be used in even higher compression ratio engines, increasing efficiency even more.

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.

The basic architecture is very similar but the California's direct injection allows a higher compression ratio and it has a wider bore and shorter stroke, displacing 4297cc rather than the 4308cc of the F430.

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.

Added attractions include direct fuel injection, a larger bore, a shorter stroke, and a higher compression ratio (raised from 11.9 to 12.2:1).

To begin with, the turbocharger itself is a twin - scroll unit, chosen over a supercharger and single - scroll unit because its low back pressure is suited to the MX - 5's high compression ratio Skyactiv engine.

Higher compressions ratio means more power is generated from every combustion.

At mid-range rpm, the direct injection makes possible a relatively high compression ratio of 10.5:1 to foster crisp acceleration, and some 148 lb - ft of torque is available for a few moments under overboost conditions in throttle transitions.

Along with further mods that included larger inlet valves and a higher compression ratio, this enabled the 1.6 - litre engine to produce 108bhp at 6100rpm and 103 lb ft at 5000rpm.

Peak power from the quad - cam V8 rises from 483bhp to 503bhp, the increase due to a revised carbonfibre intake system being fed more air, modified pistons that feature re-profiled crowns, a higher compression ratio (up from 11.3:1 to 11.75:1), and a lightweight sports exhaust system with a single silencer and tailpipes repositioned to keep them out of the revised underbody airflow.

No other petrol engine features direct injection at a pressure of 200 bar, spray - guided combustion and piezo injectors, all in conjunction with map - controlled cylinder shut - off, an all - aluminium crankcase with «spectacle» honing, four - valve technology with continuous camshaft adjustment, a high compression ratio of 12.6: 1, a start / stop system and generator management — while revving to a maximum speed of over 7000 rpm.

Refreshingly, this wasn't the work of an afternoon with a laptop but arises out of a higher compression ratio, lighter valves, deeper valve seats and new pistons.

Heavier - weight components are used in some areas to handle the higher compression ratio — generally more than twice that of gasoline engines

The higher compression ratio in diesels means they are harder to start, but once they are running the energy expended in compressing air is regained during the expansion stroke when the compressed air is allowed to «spring» back, so the higher compression ratio causes negligible engine braking via energy being lost as friction and heat of compressed air to engine block.

Premium fuel will allow more spark advance, higher compression ratio, or both.

Diesel engines produce more torque than petrol engines for a given displacement due to their higher compression ratio.

Other changes include a higher compression ratio, a new intake manifold and an extensively modified valve train.

The production M4 GTS will be fitted with a water - injection system, allowing a higher compression ratio or increased turbocharger boost for more power.

The production M4 GTS's twin - turbo 3.0 - liter inline - six will be fitted with a water - injection system, which cools down the intake temperature thus allowing a higher compression ratio or increased turbocharger boost for more power.

A higher compression ratio of 11.5:1, a new low - friction timing chain and a cylinder head with built - in exhaust manifold to save weight have all helped to improve fuel efficiency and cut emissions.

The combustion chambers also featured a smaller quench design for a higher compression ratio and enhanced flow characteristics.