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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

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07-08-2005 14:32 1.8L sohc ivtec swap in 7th gen civic ex?   (Score: 1, Normal) rum151
07-08-2005 14:32 rum151
07-26-2005 15:55 jtkellertx
04-26-2006 00:02 EG Dan
04-26-2006 00:07 EG Dan
07-25-2005 10:28 Does "shorter" allow for RWD in future?   (Score: 1, Normal) voyageur
07-30-2005 11:34 CD5acrd
07-08-2005 03:04 Cracking con rods on 1.8L   (Score: 1, Normal) Quint Integra
07-08-2005 08:05 Dren
07-22-2005 14:38 Gly
07-05-2005 11:12 EX getting K20   (Score: 1, Normal) BB25
07-05-2005 14:17 CivicB18
07-06-2005 09:51 RayChuang
07-08-2005 21:41 misterpst
07-10-2005 11:32 RayChuang
07-10-2005 11:41 carquaker
07-10-2005 11:49 jtkellertx
07-11-2005 14:43 Varmint
07-11-2005 17:16 Tonerl
07-11-2005 18:56 &REY
07-12-2005 01:46 Wizard
07-05-2005 16:04 What will the EX make?   (Score: 1, Normal) tmkarab
07-05-2005 16:48 BB25
07-05-2005 17:22 corey415
07-05-2005 17:59 Paulbrownz
07-05-2005 18:16 SIVELOZ
07-05-2005 18:45 NAfan
07-06-2005 14:16 Jonavin
07-06-2005 14:31 corey415
07-05-2005 18:31 tmkarab
07-05-2005 18:41 dampfnudel
07-05-2005 19:41 SIVELOZ
07-05-2005 22:57 Varmint
07-05-2005 23:53 mininsx
07-06-2005 04:16 iivtecracerii
07-06-2005 08:41 SIVELOZ
07-06-2005 09:16 Drum
07-06-2005 09:40 RayChuang
07-08-2005 22:59 civic06
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07-06-2005 14:56 SIVELOZ
07-09-2005 18:13 Doesn't seem to preclude an HX model   (Score: 1, Normal) AZCivic
07-11-2005 16:32 Wizard
07-05-2005 21:26 what the...?   (Score: 1, Normal) carquaker
07-10-2005 12:18 jtkellertx
07-11-2005 09:36 Quint Integra
07-10-2005 12:15 Torque Lower than Hybrid   (Score: 1, Normal) voyageur
07-11-2005 02:37 mininsx
07-08-2005 13:11 Anyone know Torque figures on SI engine yet??   (Score: 1, Normal) Acura Type S'in
07-08-2005 16:34 Wizard
07-08-2005 17:19 corey415
07-05-2005 21:55 Piston Oil Jets, how do they work?   (Score: 1, Normal) ViceCity
07-05-2005 22:06 Mike Freitas
07-06-2005 00:00 mininsx
07-07-2005 19:53 ViceCity
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07-07-2005 01:35 New Civic Engine for the South Asian Market   (Score: 1, Normal) longlivehonda
07-07-2005 10:53 Wizard
07-08-2005 00:17 longlivehonda
07-06-2005 12:06 Si engine?   (Score: 1, Normal) Dren
07-07-2005 14:30 96civicEX
07-07-2005 21:17 Dren
07-05-2005 14:41 Sounds like Valvetronic   (Score: 1, Normal) Caffeinated21
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07-07-2005 12:06 mininsx
07-05-2005 10:45 amazing   (Score: 1, Normal) kiwikungfu
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07-05-2005 14:03 Chidoro
07-05-2005 15:57
          • Dyno   (Score: 1, Normal)
kiwikungfu
07-05-2005 16:56 _Alex_
07-05-2005 17:17 corey415
07-05-2005 18:35 notyper
07-06-2005 00:22 _Alex_
07-05-2005 17:09 penguin
07-05-2005 19:31 carcrazy84
07-05-2005 20:03 changomo
07-05-2005 21:19 anime_man24
07-06-2005 11:55 Dren
07-05-2005 22:50 Honda1
07-06-2005 00:08 mlody
07-07-2005 07:53 Sledge
07-05-2005 22:10 Mike Freitas
07-05-2005 09:33 How does this translate into Horsepower and Torque (Pounds/Feet)   (Score: 1, Normal) Nek
07-05-2005 09:39 b18ctyper
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07-06-2005 02:19 dodole
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07-06-2005 15:56 Specifications for the 1.8-liter i-VTEC engine   (Score: 1, Normal) Honda41
07-06-2005 16:01 Honda41
07-05-2005 22:52 For use in other vehicles besides the Civic?   (Score: 1, Normal) NAfan
07-06-2005 02:00 RayChuang
07-06-2005 10:37 Tuan
07-05-2005 16:47 No Direct Injection. :(   (Score: 1, Normal) j9chan
07-06-2005 01:54 RayChuang
07-06-2005 04:41 civic_cx_92
07-06-2005 09:36 RayChuang
07-06-2005 01:01 Dyno graphs (taken from Honda video)   (Score: 1, Normal) _Alex_
07-05-2005 20:02 Nice job!   (Score: 1, Normal) osaze
07-05-2005 10:51 Engine Code?   (Score: 1, Normal) mininsx
07-05-2005 11:06
  • R18   (Score: 1, Normal)
JeffX
07-05-2005 11:28 mininsx
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07-05-2005 12:11 mininsx
07-05-2005 09:25 1.34 l. hybrid has a 20% performance increase   (Score: 1, Normal) voyageur
07-05-2005 10:18 HONDA AFVM
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07-05-2005 10:59 mininsx
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07-05-2005 11:32 Dren
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