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IDENTIFYING DENSO PLUGS
●
We developed the 0.7mm
diameter ultra-fine iridium alloy
electrode, the first the world.
Ignitability and lifetime have
been improved dramatically.
SK16R-P11 comes standard
with the Toyota Century.
（Example）
SK16R-P11
・
SK20R11
●
During regular operation, it sparks with the
main electrode, but when it becomes
fouled, it sparks with the side electrodes to
burn off the carbon - this plug is the
optimum design for direct injection engines.
It comes standard with the Toyota Crown's
3R direct injection engine (D-4).
（Example）
SK20BR11
New Triple Electrode Iridium Plug
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Platinum is used in both the
center electrode and the ground
electrode.
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By making the center electrode
fine and by using a platinum tip,
fuel consumption, drivability, and
durability have been increased.
（Example）
PK20R11
Platinum Plug
●
To prevent wear during
plus (+) discharge, the size
of the platinum has been
increased.
（Example）
PK20R-P11
Platinum Plug for DLI (+ -Discharge)
●
By extending the spark position
into the combustion chamber,
the combustion efficiency is
increased and fuel consumption
and drivability are improved.
（Example）
PKJ20CR-L11
Extended Platinum Plug
Iridium Power is...
■With an Ultra-fine Iridium Alloy Center Electrode
Employing a high melting point iridium alloy tip for the
center electrode tip, a fine dia. of 0.4mm has been realized.
This fine electrode has led to a lower spark voltage and a
large increase in ignitability, which draws out even more
output and accelerator response from the engine.
（Melting Point: Iridium ; 2454°C,Platinum ; 1769°
C）
T h e P L U G S C O N F I G U R AT I O N S
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With a U-Groove ground electrode, large
ignition energy can be obtained, easily
igniting even lean mixtures.
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Because it is fully projected (2.5mm
insulator projection), carbon fouling is
reduced, and smooth starting and
acceleration performance are realized.
（Example）
W16EX-U
U-Groove Plug
●
With a taper-cut ground electrode,
quenching action is dramatically
reduced, increasing ignitability.
●
With a special platinum alloy in the
center electrode (0.7mm dia.). The
attached part is spot welded in three
locations for a high degree of reliability.
（Example）
W31ES-ZU
Platinum ZU Plug
●
Employing a semi-surface
gap discharge, ignitability,
fouling resistance, and
durability
have
been
increased.
●
Reduced voltage loss using
a 7 rib design.
（Example）
S29A
Semi-Surface Gap Plug for Rotary Engines
●
Using a U-grooved ground electrode, a
large ignition performance is obtained,
allowing even lean mixtures to be ignited
easily.
●
The spark position is extended into the
ignition chamber, improving combustion
efficiency, fuel consumption, and drivability.
（Example）
J16AR-U11
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For Mazda and Mitsubishi
Vehicles.
●
KJ20CR11 has no U-groove.
KJ20CR-U11 has a U-groove.
（Example）
KJ20CR11
・
KJ20CR-U11
●
The parts of the center electrode
facing the ground electrodes
have been platinum tipped.
●
The dual electrode construction
results in a lower required voltage
during the plus (+) discharge.
（Example）
PK20TR11
Dual Electrode Platinum Plug
●
Only the center electrode is platinum
tipped, allowing the electrode to be
made fine which increases fuel
consumption, drivability, and durability.
●
K16PR-TP11 has had the ground
electrode taper cut, further increasing
ignitability.
（Example）
Q20PR-P11
・
K16PR-TP11
Single-Side Platinum Plug
●
Using a semi-surface discharge,
ignitability and fouling resistance
are increased.
●
W20EKR-S11 are for Honda
vehicles, while W20EPR-S11are
for Mitsubishi vehicles.
（Example）
W20EKR-S11
・
W20EPR-S11
Semi-Surface Gap Plug
●
The ground electrode is
taper cut and the center
electrode is made finer,
improving ignitability.
（Example）
KJ20CR-L11
●
Specifically for Daihatsu, there
are two ground electrodes,
ensuring durability.
（Example）
）
J16AY
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The ground electrode of this revolutionary
iridium plug features DENSO's very own
technology and is needle-shaped,
resulting in an unparalleled reduction in
quenching action.
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Used in the Toyota Sienta and the Toyota
Crown since 2003.
（Example）
FK20HR11
Iridium Plug
0.7mm Dia.
Iridium Tip
Platinum
Tip
●
By using the 0.55mm diameter fine
iridium center electrode and the platinum
tipped ground electrode, lifetime has
been improved.
●
12mm Diameter x 26.5mm Length, and
14mm Hex new type
●
Used as a genuine Nissan LAFESTA part.
（Example）
ZXE20HR13
Iridium Plug
0.55mm
Dia. Iridium
0.7mm
Dia.Platinum
0.7mm Dia.
Iridium Tip
Platinum
Tip
Side
Electrodes
Platinum
Tip
Platinum
Extended Plugs
7mm
5mm
7mm
5mm
Because these are specialty plugs, installation on any other than the specified vehicles is not possible
●
Used as a genuine Nissan
TIIDA and NOTE part.
FXE20HE11 is a 12mm
Diameter x 26.5mm Length,
and 14mm Hex new type
（Example）
FXE20HE11
Needle to needle Iridium Plug
0.55mm
Dia. Iridium
0.7mm
Dia.Platinum
Answer: 6
