Here are some modern techniques Honda is using for fuel efficiency. Hopefully most of you haven't heard of them.
Honda has long been a FE pioneer, ever since they promoted 4 stroke motorcycles over 2 strokes. Some of their old technology that you all might be familiar with:
- CVCC
- Lean Burn
- IMA (Integrated Motor Assist)
Here is some of their newer technology, found via
Temple of VTEC:
1.3l i-DSI (88hp)
- Smaller than D-Series (4.5" thinner, 2.7" shorter)
- Roller Bearing Rocker Arms (might be old VTEC-E technology?)
- Pulverized Molybdenum Piston skirts (reduced sliding friction)
- Offset crankshaft (old Insight technology)
- Stainless Steel Exhaust (faster warmup)
- Oblique Catalytic Converter (faster warmup)
- Dual Sparkplug + Swirl Action (10.8:1 CR, more compete ignition, intenser combustion)
Claimed FE: 24km/L (56MPG)
1.3l i-VTEC Engine (100hp)
- Split Coolant Flow Head (reduces knocking)
- Special Crown Design Piston (reduces knocking)
- Cracked, One-piece Rod forgings (reduces reciprocating mass)
- Pattern Piston Coating (reduces sliding friction)
- Variable Tension Serpentine Belt (reduced low rpm friction)
- Integrated Cylinder Head Manifold (reduces warm-up time)
- Resin Valve Cover (reduces weight)
- Valve Pause (Think VTEC-E, but w/ massive EGR recirculation rather than lean burn)
- Dual Electrode Spark Plugs (hotter spark)
Claimed FE: 24km/L (56 MPG)
BTW -
D15z1 VTEC-E (92hp)
Claimed FE: 20.5km/L (48MPG)
- LostCause