VTEC and Honda’s VTC (Variable Timing Control), a continuously variable camshaft phasing technology used on the exhaust camshaft of DOHC VTEC engines, are combined in the Honda i-VTEC (intelligent-VTEC) system. In 2001, Honda’s K-series four-cylinder engine family debuted the technology. By the 2002 model year, all four-cylinder Honda or Acura vehicles marketed in the US used i-VTEC, with the 2002 Honda Accord being the sole exception.
The exhaust camshaft can now advance between 25 and 50 degrees, depending on the engine configuration, however the VTEC controls of valve lift and valve duration are still only available for distinct low- and high-RPM profiles. A computer-controlled, oil-driven, adjustable cam sprocket is used to implement phasing. VTEC is impacted by both engine load and RPM. At idle, the exhaust phase is completely retarded; at high throttle and low RPM, it is substantially advanced. Further torque output optimization results, particularly at low and middle RPM. Two distinct i-VTEC K series engine types are described in the next section.
The J-Series SOHC engines from Honda have a completely separate system that is also confusingly referred to as i-VTEC. To increase fuel efficiency when operating under light loads, Honda J-Series engines equipped with i-VTEC combine SOHC VTEC operation with Honda VCM (Variable Cylinder Management) variable displacement technology.
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What makes VTEC and i-VTEC different from one another?
Honda added i-VTEC, which effectively stands for Intelligent VTEC, for you if variable valve timing wasn’t hard enough before. Since its introduction in Honda vehicles in 2001, almost all of their performance engines have utilised it.
The above-mentioned architecture is used in conventional VTEC engines. Only the lift and duration offered by the two distinct camshaft lobes or profiles can be controlled by this technique. In order to have better control over valve timing, Honda created and combined what is known as i-VTEC, or VTC with VTEC.
Variable timing control (VTC) allows the camshaft to be advanced or retracted in order to manage valve overlap. The exhaust valve never opened and closed simultaneously in conventional VTEC engines because the intake valve always opened first. With VTC, the camshaft lobe angles can be adjusted to allow the valves to overlap or open simultaneously. It can be altered at various RPM levels due to its changeable nature.
So, What’s the Difference Between VTEC and i-VTEC?
By allowing for camshaft angle modifications, i-VTEC adds more valve timing control. The valves must open and close differently for each RPM range in order to operate at their peak performance at both low and high RPMs. The main distinction between VTEC and i-VTEC is that the former does this.
In contrast to the conventional VTEC, i-VTEC offers a smoother power band and improved performance at both high and low RPMs.
Does an i-VTEC engine speed up a car?
Honda created the Variable Valve Timing & Lift Electronic Control (VTEC) technology to improve the overall performance, efficiency, and fun factor of their vehicles. The technology has become a well-known meme as a result of its frequent use in Fast and Furious movies. Few people are aware of the mechanics behind the expression “VTEC just kicked in, yo!” What you need to know about the system is provided here.
What does the I in i-VTEC stand for?
The original VTEC technology was enhanced by Honda and eventually became the Honda i-VTEC (intelligent-VTEC). The majority of Honda 4-cylinder automobiles employed i-VTEC by 2002 after this technology became widely accessible in 2001. The i-VTEC technology combines Honda’s VTC and the original VTEC (Variable Timing Control).
On a Honda, what does VTEC stand for?
June 20, 2020. Variable valve-timing system, or VTEC, has been a feature of Honda and Acura vehicles since 1989. The 1991 Acura NSX was the first vehicle in the United States to feature VTEC, which is an acronym for variable valve timing and lift electronic control.
The best VTEC engine: which one?
The B18C6 is one of the best-rated Honda VTEC engines. This 1.8L 4-cylinder engine was installed in Honda Integra and Acura Integra Type R models sold worldwide from 1999 to 2001. For a car that was so light, its 195 horsepower and 130 pound-feet of torque were excellent. Additionally, it had a redline of 8400 RPM, while VTEC began to operate at 5700 RPM.
Because it was simple to alter and had that distinctive DOHC VTEC sound when you approached the VTEC engagement point, the B18C platform rose to great popularity. This results in a lot of power in the higher RPM ranges, making the cars they are in feel sportier and more enjoyable.
The B18C is still recognized as one of the best VTEC motors ever made, and it continues to be in high demand all over the world. If you’re looking for an excellent, low-mileage B18C, be prepared to pay more.
Which VTEC engine is the quickest?
Even if high-rpm flogging is not necessary, it makes for storming fun as the 2.0L turbo 4-cyl. cranks out 306 hp before hitting the redline at 7,000 rpm. This VTEC engine is the most potent street-legal Honda to ever enter America, with a specified output of 153 hp/L.
Is Turbo good with VTEC?
Under any circumstance, from city driving with frequent stopping and starting to highway travel, the VTEC TURBO engine is fuel-efficient. A 2.4L normally aspirated engine has a lot of torque for city driving due of its size. Due to its turbo, the VTEC TURBO engine has higher torque than the 2.4L normally aspirated engine. A 1.5L engine may perform on par with a 2.4L engine thanks to the VTEC TURBO technology.
Summary
Utilizing a turbocharger, direct injection system, and variable valve timing mechanism, Honda’s VTEC TURBO technology efficiently utilises every last drop of fuel.
Honda aims to mix driving pleasure with environmental performance with VTEC TURBO and hybrid technologies.
Which is superior, VTEC or Turbo?
While VTEC is more focused on extracting the maximum amount of horsepower from the engine because torque on VTEC cars can only be felt on the VTEC range, which is anyplace after 5,500RPMs, the torque produced by a turbo is still negligible in comparison.
VVT vs CVT: Which is superior?
In response to your query, VVT can undoubtedly provide efficiency advantages. Since CVTs experience more drivetrain losses than manual gearboxes, they can’t actually be regarded as efficient.
VVTI’s full name?
The creation of TokyoTOYOTA MOTOR CORPORATION’s new “Variable Valve Timing-intelligent” (VVT-i) technology, which improves performance and fuel efficiency, was unveiled today.
Modern engine development must focus on both improved fuel efficiency and improved vehicle performance. The societal needs of protecting the environment and natural resources must also be met by modern engines.
Toyota added the WT mechanism to their 4A-GE sports engines in 1991 in an effort to boost engine production and torque. Depending on the state of the engine, WT permits the intake valve to open and close in two phases.
An enhanced version of the WT mechanism is called VVT-i. In order to deliver the best valve timing dependent on driving conditions, VVT-i continually modifies the open/close time of the intake valve. The benefits of VVT-i include improved fuel efficiency, higher torque and output, and decreased nitrogen oxide (NOx) and hydrocarbon emissions.
The VVT-straightforward i’s architecture makes it incredibly dependable and simple to adapt for already-existing engine designs. The new technology is anticipated to have numerous uses in the future.
A new model that will be released within the year will be the first to integrate VVT-i engines. Tests have shown that VVT-i boosts low and medium range torque by roughly 10% while increasing fuel economy by about 6%.
What RPM does VTEC turn on at?
In 3-Stage VTEC, the timing and lift of the intake valves are managed by three separate cam profiles. Since there isn’t much room in this version of VTEC because it was built around a SOHC valve head, it can only change how the intake valves open and close. In this application, conventional VTEC performance and low-end VTEC-E fuel economy advantages are combined. In 12-valve mode, which is used between idle and 2500–3000 RPM depending on the load, one intake valve fully opens while the other very minimally does so to avoid fuel from accumulating behind the valve. This 12 Valve mode causes the intake charge to swirl, improving low end performance and fuel economy by increasing combustion efficiency. Depending on the load, one of the VTEC solenoids engages at 3000–5400 RPM, causing the second valve to lock onto the camshaft lobe of the first valve. This technique, also known as 16-valve mode, mimics a typical engine operating mode and enhances the mid-range power curve. Both VTEC solenoids are now engaged at 5500–7000 RPM, causing both intake valves to use the middle portion of the camshaft. Peak power is produced at the highest end of the RPM range by the third lobe, which is optimized for high performance.
In a more recent version of 3-Stage i-VTEC, VTC and PGM-FI were merged to allow the ECU to regulate the whole spectrum of modes and archive higher performance and fuel economy advantages. The Honda CR-Z can continuously transition between low-end and standard modes between 1000 and 2250 rpm and engage high cam mode from 2250 rpm and above on SOHC.
Does VTEC exist on every Honda engine?
If you have any interest in high-performance vehicles, particularly those made in Japan, you’ve probably heard of Honda’s powerful VTEC engine. The primary source of Honda’s renown is this. Although VTEC has continued on turbocharged Honda engines like the current Type R Civic, it is their four (and six) cylinder normally aspirated engines’ ace in the hole. VTEC has the ability to improve performance, boost economy, and cut emissions. Honda has successfully employed it for all three of these objectives over the years. Are all Hondas VTEC, though? You’ll get the solution to that question in this article.
VTEC has also influenced the development of the “VTEC Just Kicked In Yo” meme genre on the Internet:
But what precisely is VTEC? How is better performance achieved? Does every Honda have VTEC, too? These questions and more will be addressed in this installment of Car Facts.
VTEC is almost universally found in modern Honda models, but it wasn’t always this way. Not a single Honda vehicle had it a little over 30 years ago. Honda gradually integrated it across its whole lineup after first keeping it for performance vehicles. To discover more about what VTEC does, which Hondas have it, and why, let’s take a closer look at how it functions.
What makes VVT-i and VVT-i different from one another?
As far as we know, the 1.5 liter engine lacks dual VVT-i. The Corolla sedan and hatchback have a 1.8 (dual VVT-i) engine, while the Corolla wagon has a 1.5 (single VVT-i) engine. Both of these Toyota vehicles are sold new in New Zealand.
The difference between single VVT-i and dual VVT-i is that single VVT-i refers to an engine with variable valve timing on only the inlet cam. So, in broad terms, it is basically just a cylinder head alteration, so I wouldn’t get too worked up about whether it has dual or single VVT-i.
What makes VVT-i and non-VVT-i different?
The valve timings in standard non-VVT or non-VVTi engines are managed by a system of cam shafts and belts.
The timing of the valves varies in a VVT engine depending on the load and engine speed. This guarantees that the valves open when necessary in accordance with the engine speed and load.