|Tokyo, May 18, 2001 --- Honda
Motor Co., Ltd. today announced that the 1.3-liter, 4- cylinder i-DSI*1
- the latest in Honda's new generation of i-series engines - is a lightweight,
compact, high-performance engine with plenty of horsepower and ample torque
at any rpm that uses intensive combustion to achieve a combination of ultra-high
fuel efficiency and clean emissions. The i-DSI will be installed in a new
small car, scheduled to be unveiled in June 2001.
The engine is equipped with two spark plugs in each of its newly designed, compact
combustion chambers. These sparks are activated in a different order depending upon
engine rpm and load, resulting in intelligent, dual-point sequential ignition control to
achieve intensive fuel combustion at any rpm.
Two spark plugs per cylinder are arranged diagonally to accelerate flame
propagation in the combustion chamber, thus achieving rapid combustion of
the air-fuel mixture and obtaining high output from a minimum amount of
gasoline. This intensive combustion at any rpm not only controls knocking,
but also permits a much higher compression ratio, achieving a maximum output
of 63kW (86PS) at 5700 rpm*2, and maximum torque
of 119Nm (12.1kg-m) at 2800 rpm*3. The engine
is paired with Honda's newly-developed, lightweight, compact Multimatic
S continuously-variable-speed transmission, which minimizes engine power
loss to achieve ultra-high fuel efficiency of 23km/L*4
--- world class top level for a gasoline powered production vehicle, and
compliant with 2010 fuel efficiency standards. Furthermore, harmful exhaust
emissions have also been greatly reduced: the i-DSI engine's clean performance
is recognized by the National Ministry of Transportation's "Low Emissions
Cut-away view of the 1.3-liter i-DSI engine and new Honda Multimatic S transmission.
Structure of the 1.3-liter i-DSI combustion chamber
||DSI: Dual & Sequential Ignition
||Values determined by in-house testing.
The engine has also been made 8% lighter and more compact than Honda's previous
1.3- liter engines. This was achieved by reducing the valve angles to create
a smaller combustion chamber, and by incorporating a more compact air cleaner,
a serpentine auxiliary drive system, a plastic intake manifold, a stainless-steel
exhaust pipe, and other innovations.
The lightweight, compact, high-performance i-DSI engine in tandem with a
newly developed Honda Multimatic S transmission creates a new breed of small
car that achieves ultra-high fuel efficiency and clean emissions coupled
with superior performance. In addition, the smaller engine room makes for
a roomier passenger compartment.