VVT-i (Variable Valve Timing-intelligent) System General This system controls the intake camshaft valve timing so as to obtain balance between the engine output, fuel consumption and emission control performance. Please enter your username or email address to reset your password. Well, they are wrong. In terms of fuel consumption, the 1.8-rated fuel engine consumes about 12 km/L while the 1.5L engine uses an average of about 15 km/L. IKR. I want to compare it to the CAR fuel consumption figure for the Lexus with the same engine. How does variable valve timing work? However, you need to take some time off to study how your VVT-i engine behaves based on how you drive. However, as with any other system, using VVTi properly requires learning. To drive quickly you will need to press the throttle quickly but then shift up just under the engine’s timing change RPM. Does that really matters? My car is - Toyota Corolla question Engine: 1.3 i VVT-i (87 Hp) AT Maximum speed: 170km/h Fuel consumption - urban: … Proponents of the VVT-i fuel efficiency are right of course. Use good quality fuel - from my own findings its worth paying the extra for BP or shell as typically you'll get another 10% fuel saving which outweighs the cost over supermarket fuel. Though the check engine light should come on if this sensor isn't giving good enough feedback, it might be worth measuring its output. press the throttle softly until the required higher RPM (3500-4000 RPM) is reached. Vvti Engine Reliability Better Fuel Economy – Engine efficiency has a lot to do with the timing of the exhaust valve and intake valve. Vehicle manufacturers are adding variable valve timing (VVT) to some vehicles to help them meet Canada’s increasingly stringent greenhouse gas emission standards. Dec 6, 2017 #1 Nisaidieni kujuwa tofauti ya ulaji wa mafuta wa engine za 3s na zile za Vvti? With ‘P’ and ‘T’ small the ‘E’ will be small as well, while ‘E’ is the factor that directly related to fuel consumption. Usually the engine and transmission is designed to work together so the RPM could drop to just above the lowest RPM to move the car comfortably. You save if you drive correctly and waste if you don’t. VVT and lift can reduce fuel consumption by 1 to 6%, saving you money and reducing your impact on the environment. Put simply, it is a valve timing stechnology. First you need to know what a VVT-i engine is and how it works. New Member; Registered Member; 0 12 posts; Toyota Model: Avensis 1.8 vvti Estate Share; Posted October 19, 2005. Quoted weight at the kerb is 1225 kg. XI JINPING: China’s reform and opening-up is a miracle, People living with HIV face starvation in Amuru, Residents, leaders decry delayed completion of Aduku sub county headquarters, Tests confirm Barca’s midfielder Coutinho’s knee injury, UMA want treatment plan for COVID-19 positive health workers, Lango cooperative union struggling to repossess assets. VVT-i, introduced on the 1JZ-GTE/2JZ-GTE engine in 1996, varies the timing of the intake valves by adjusting the relationship between the camshaft drive (belt or chain) and intake camshaft. In The Magazine, TECH NEWS 2 Comments, It is not as straight-forward as your car sales person says. Use good quality fuel - from my own findings its worth paying the extra for BP or shell as typically you'll get another 10% fuel saving which outweighs the cost over supermarket fuel. The extra urban fuel consumption of this automobile is 5.67 l/100 km, the combined fuel consumption is 6.68 l/100 km and the urban is 8.59 l/100 km . Just for interests sake. This is where VVT-i fuel efficiency comes into play; it could deliver 90% of its torque (the power to move the wheels and therefore accelerate the car) from RPM as low as 2000. Why can it do that? Is this reasonable, or should I get better? Engine oil pressure is applied to an actuator to adjust the camshaft position. Recommended Posts. Smaller, lighter vehicles like city cars and superminis typically have higher MPG, whilst large family cars or MPVs will have lower fuel economy. This is where VVTi play; it could deliver 90% of its torque from RPM as low as 2000. Some think innovations like the VVTi (Variable Valve Timing with Intelligence) engine are just a marketing gimmick. Ideally, a VVT-i engine should change its timing between low engine speed and high engine speed at around 3000 RPM. The actual intake side valve timing is feed back by means of the camshaft position sensor for constant control to the target valve timing. So it is a double edged sword. About Dual VVT-I Car Engines. It all depends on how you drive. It was specifically made for the 1.0-litre variant for Perodua's first solely in-house manufactured car which is the Perodua Bezza. Get information about engine specs, fuel consumption, … New 1.0-litre VVT-i engine is lighter & compact for better fuel consumption, better performance, reduced vibration & noise level. The DOHC VVTi - 16 Valves can boast the engine upto 63kw 84hp @ 6000 RPM horsepower with 121 Nm @ 4400 RPM torque. I am talking about Auto transmission cars with AC on. Almost all modern cars use VVT technology to improve their performance and fuel economy. Fuel Tank Capacity: 42L. This allowed the pilot to choose full take off and pursuit power or economical cruising speed, depending on what was needed. Try to find the difference between low speed timing and high speed timing. Currently, on the Ugandan market, Toyota’s VVT-i engine is most noted by pushers of this view. from 2950 to 1900) you will be preserving your car’s swiftness and saving fuel. The higher the RPM the more horse power your engine delivers. How to drive vvti d4 engine to get minium fuel consumption 8.7l/km in town area and 10.0l/km in high way. Check it on each gear. Does Uganda have a viable long term aviation strategy? Nov 16, 2011 75 95. Basically, VVTI Valve Matic VVT-i (Variable Valve Timing with intelligence) means if the vehicle is cruising along in the city with minimal load on the motor, the valve opens up less, using less gas and improving consumption. It said that you can save up to 30% of your car fuel consumption with this engine. Based on this, there is a popular view that one should accelerate gradually i.e. Electronic principles of electromagnetism in the form of a solenoid valve are used to control this oil flow. The connecting rods and caps are made of high-strength steel. Proponents of the VVT-i fuel efficiency are right of course. Mfano ulaji wa mafuta wa RAV4 yenye 3s na ile yenye engine ya vvti? I have a colleague who has a 1.8L which does 10 kmpl in Colombo and 15-16 kmpl outstation, which I think is same as what you get with the 1.5L, however you get more power with the 1.8L so it … Part of the explanation is that VVTi utilise the backflow of the exhaust gases into the intake port to reduce engine power loss and use up unburnt fuel contained in the exhaust gases to lower the combustion temperature. The manufacturer makes the car using 4-cylinder gasoline engines available in two options, the 1,496cc option that packs 110hp and the 1,795cc shipping with 190hp. But the often unsaid truth is you can waste 30% fuel driving the same VVT-I engine. The advantages are lower fuel consumption, lower exhaust emissions and higher power output due to the intelligence. catch(e){var iw=d;var c=d[gi]("M458147ScriptRootC719905");}var dv=iw[ce]('div');dv.id="MG_ID";dv[st][ds]=n;dv.innerHTML=719905;c[ac](dv); Tags: # ekfaysal (Faysal Khan) 2009-10-17 16:10:00 +0600 #1. The Independent But there is another view; that it is better to press the throttle harder so that higher RPM is attained at a faster rate. Compared to conventional engine, the VVT-i engine can deliver more torque at lower Revolutions Per Minute (RPM) range and more horsepower at higher RPM while maintaining fuel efficiency and lower emission. (function(){ Next, you need to check the lowest RPM that your engine can work to move your car on a straight and level road. Part of the explanation is that VVTi utilise the backflow of the exhaust gases into the intake port to reduce engine power loss and use up unburnt fuel contained in the exhaust gases to lower the combustion temperature. Modern engines are designed to have more power with lower fuel consumption. Technical Forums. Basically, VVTI Valve Matic VVT-i (Variable Valve Timing with intelligence) means if the vehicle is cruising along in the city with minimal load on the motor, the valve opens up less, using less gas and improving consumption. VVTi is a sophisticated valve timing control mechanism developed by Toyota; and embraced by other manufacturers such as Honda’s VTEC, BMW and others.

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