[home][rumors and news][model release matrix][dealer network][desktop calendar][exhaust notes][tov forums][links][search][sponsors][garage][login]

Tire Rack Upgrade Garage
 Search for a Dealer:
 Canadian Flag US Flag
 Honda Acura
 ZIP  
Acura
There are currently no active Acura promotions
Honda
There are currently no active Honda promotions
This 2019 Acura RDX A-Spec is wearing an exclusive new shade of blue
More.......................
2019 Pilot gets upgraded with standard LED headlights and "Telematics"
More.......................
Sources: 2019 HR-V adds Sport trim, loses 6MT option
More.......................
All-new 2019 Acura RDX Makes Road Debut as Official Vehicle of Rally Cycling Alongside NSX Supercar
More.......................
Clarity Electric still available for $199/month lease, but down payment has increased $600
More.......................
Driving impressions: Hondata's FlashPro for the FK8 Civic Type R
More.......................
American Honda Reports April Sales Results
More.......................
Honda reveals Everus EV Concept at Beijing International Auto Show
More.......................
Professional Motorsports --> Re: Indy 500
Join Discussion......
Today's Reading Links --> Re: Tesla - facts behind the mirage
Join Discussion......
Today's Reading Links --> Re: The Fine Tradition of English Goalkeeping
Join Discussion......
Professional Motorsports --> Re: Super GT 2018 - Suzuka
Join Discussion......
General Talk --> Re: Harley's Demise
Join Discussion......
RDX --> Re: New RDX Fuel Economy
Join Discussion......
Professional Motorsports --> Re: F1 - 2018 Monaco Grand Prix - Spoilers
Join Discussion......
General Talk --> Re: Is a G1 NSX w/4AT worth the huge price break?
Join Discussion......
RDX --> Re: 2019 RDX pricing?
Join Discussion......
Professional Motorsports --> Re: Important Message
Join Discussion......
Sales Experiences --> Re: Questions regarding: lease, then buy option
Join Discussion......
Professional Motorsports --> Monaco
Join Discussion......
Today's Reading Links --> Re: Acura-when marketing went adrift
Join Discussion......
RDX --> Re: 3rd Generation Acura RDX Reviews
Join Discussion......
General Talk --> Re: Honda S660 Modulo X
Join Discussion......
Honda Develops New 1.8l i-VTEC Engine For New Civic
 Date: July 05, 2005 08:56
 Submitted by:  Tuan
 Source: Honda Press Release
 Credibility Rating: N/A


TOKYO, Japan, July 5, 2005 - Honda Motor Co., Ltd. today announced that it has developed a new 1.8l i-VTEC engine to be introduced this fall in the new Civic that achieves both more powerful performance and improved fuel economy. The engine employs an intelligent VTEC system that switches the valve timing for maximum efficiency during startup and acceleration to achieve powerful, torquey performance, then delays intake valve closure timing during cruising and other low-load conditions for improved fuel economy. Use of the valve timing control system results in off-the-line acceleration performance equivalent to a 2.0-liter engine, fuel economy approximately 6% better than the current 1.7-liter Civic engine, making it one of the worlds most efficient 1.8-liter engine designs. During cruising, the new engine achieves particularly high fuel economy, on a par with that of a 1.5-liter engine.

Under low-load conditions on conventional engine, the throttle valve is normally partly closed to control the intake volume of the fuel-air mixture. During this time, pumping losses are incurred due to intake resistance, and this is one factor that leads to reduced engine efficiency. With the i-VTEC engine, however, intake valve closure timing is delayed to control the intake volume of the air-fuel mixture, allowing the throttle valve to remain wide open even under low-load conditions for a major reduction in pumping losses of up to 16%. Combined with comprehensive friction-reducing measures, this results in a significant increase in fuel efficiency for the engine itself.

A DBW (Drive By Wire) system provides high-precision control over the throttle valve while the valve timing is being changed over, ensuring smooth driving performance that leaves the driver unaware of any torque fluctuations. Other innovations include a variable-length intake manifold that delivers optimum inertia effect to further improve intake efficiency and piston oil jets that cool the pistons to suppress engine knock, for powerful torque even at rpm ranges typical in normal driving. The new engine delivers a high level of performance, with maximum output of 103kW (140PS) and maximum torque of 174Nm (17.7kgm). It also delivers cleaner emission performance, employing a 2-bed catalytic converter positioned immediately after the manifold and high-precision air-fuel ratio control to achieve emission levels 75% below 2005 Japanese government standards (based on Honda in-house testing).

In addition, lower block construction resulting in a more rigid engine frame, aluminum rocker arms, high-strength cracked connecting rods, a narrow, silent cam chain, and other innovations make the engine more compact and lightweight. It is both lighter and shorter overall than the current Civic 1.7l engine, and quieter as well.

Specifications for the 1.8l SOHC i-VTEC engine

Engine type and number of cylinders Water-cooled in-line SOHC 4-cylinder
Displacement (cc) 1,799
Bore Stroke (mm) 81.0 87.3
Max. Output (kW [PS]/rpm) 103 [140]/6,300
Max. Torque (Nm [kgm]/rpm) 174 [17.7]/4,300
Compression Ratio 10.5

*All values according to Honda in-house calculations

Specifications* for the 1.8-liter i-VTEC engine (Specifications released by American Honda on 6 July 2005)

Engine type and number of cylinders Water-cooled in-line 4-cylinder
Displacement (cc) 1,799
Bore x Stroke (mm) 81 x 87.3
Max. Output (horsepower/rpm) 2 140
Max. Torque (lb-ft./rpm) 2 128
Compression Ratio 10.5:1

*All values according to Honda in-house calculations

2Horsepower and torque calculations reflect new SAE J1349 procedures revised August, 2004.

Honda Dreamers TV Video Clip:
http://world.honda.com/HDTV/news/2005-4050705a/index.html
NOTE: It seems that a bandwidth cap on the Honda site makes smooth playback of these latest video clips impossible





Last edited by JeffX on July 06, 2005 15:24

Click Here to Submit Your Comments

Viewing Threshold (What is this?)

[fancy] [flat] [simple]
Subject Thread Originator Replies Last Post
  1.8L sohc ivtec swap in 7th gen civic ex?
rum151 4
  Does "shorter" allow for RWD in future?
voyageur 1
  Cracking con rods on 1.8L
Quint Integra 2
  EX getting K20
BB25 10
  What will the EX make?
tmkarab 40
  Doesn't seem to preclude an HX model
AZCivic 1
  what the...?
carquaker 2
  Torque Lower than Hybrid
voyageur 1
  Anyone know Torque figures on SI engine yet??
Acura Type S'in 2
  Piston Oil Jets, how do they work?
ViceCity 4
  New Civic Engine for the South Asian Market
longlivehonda 2
  Si engine?
Dren 2
  Sounds like Valvetronic
Caffeinated21 3
  amazing
kiwikungfu 19
  How does this translate into Horsepower and Torque (Pounds/Feet)
Nek 7
  Specifications for the 1.8-liter i-VTEC engine
Honda41 1
  For use in other vehicles besides the Civic?
NAfan 2
  No Direct Injection. :(
j9chan 3
  Dyno graphs (taken from Honda video)
_Alex_ 0
  Nice job!
osaze 0
  Engine Code?
mininsx 4
  1.34 l. hybrid has a 20% performance increase
voyageur 7
PR Photo Gallery - 2019 Acura RDX Advance
Read Article....................
PR Photo Gallery - 2019 Acura RDX A-Spec
Read Article....................
Photo Gallery - Some other cars from 2019 NYIAS
Read Article....................
TOV Video: 2019 Acura RDX Walk-around with LPL Steve Hansen
Read Article....................
TOV Photo Gallery: 2018 North American International Auto Show
Read Article....................
2018 Acura RLX PR Photo Gallery
Read Article....................
Contact TOV | Submit Your Article | Submit Your Link | Advertise | TOV Shop | Events | Our Sponsors | TOV Archives
Copyright © 2018 Velocitech Inc. All information contained herein remains the property of Velocitech Inc.
The Temple of VTEC is not affiliated with American Honda Motor Co., Inc. TOV Policies and Guidelines - Credits - Privacy Policy
29