Hoerbiger has launched two newsizes in its Altronic Vari- Spark ignition product line
for modern gas-powered engines.
Besides the existing XL size for
large-bore, slow-speed gas engines,
especially for integral compressor applications, Hoerbiger has added the XS
for small-bore, high-speed gas engines
between 670 and 1340 hp (500 and
1000 k W) and the XM size for large-bore, medium-speed gas engines up
to 13,410 hp ( 10 MW) and beyond.
In addition to realizing a maximum
spark voltage of 50,000 V, the VariSpark system can shape the profile
of the spark, thus adjusting the voltage to the specific engine gas mixture and application.
“Modern gas engines adopt several
technologies to achieve a lean com-
bustion,” said Gerhard Ranegger, head
of Hoerbiger’s Business Unit Engine
Solutions. “With higher boost pres-
sures, two-stage turbocharging, high
BMEP and very lean mixtures, con-
ventional spark ignition systems are
not able to ignite the mixture.
“VariSpark delivers an energy per
spark event that can be as high as
20 times that provided in a conven-
tional ignition system, thus assuring
reliable combustion and eliminating
the risk of misfiring.”
Ranegger said the use of a system
such as VariSpark is essential for
the performance of the engine and
also gives the engine manufacturer
more freedom to shape and optimize
VariSpark is electronically control-
led and the optimization is done in
the development phase. “We calculate
what the better profile for a specific
application is,” Ranegger said. “Cus-
tomers can then select the best profile
and even change it during operation.”
According to Hoerbiger, VariSpark
has received a good response from the
customer base, which needed such a
solution for lean-burning gas engines.
The system is ideal for power genera-
tion gas engines, as well as for mechan-
ical drive and even marine applications.
The new VariSpark XM and XL
cannot be retrofitted on existing en-
gines, but Hoerbiger offers alterna-
tive solutions with the CPU95 and
CD200 ignition systems. Both are
now available in VariSpark-enhanced
versions and can offer a valid alterna-
tive for retrofit projects.
The Hoerbiger Engine Solutions
business unit is active in the field of
gas engines and recently launched
other dedicated products such as
ported fuel injection (PFI) valves and
a control system called DriveCOM.
PFI valves have been designed for
a minimized response time for a very
precise admission of the gas volume.
Ranegger added that the valves are
capable of switching very high gas
He said the valves offer improved
wear and sealing properties, thanks
to an optimized material pairing, and
feature a special design for double-wall configurations. That makes PFI
valves ideal for use with dry and corrosive gases and for marine compressed natural gas applications.
As far as DriveCOM is concerned,
the new control system is a modular,
scalable and integrated control system
for internal combustion engines that is
especially designed for use in stationary off-road and marine applications.
The system is capable of monitoring all critical engine parameters
and its modules can be combined
for a customized unit. Open-structure
software allows the integration of
DriveCOM into the customer’s control architecture. CT2
Hoerbiger Expands VariSpark
Digital Ignition Line > New products accommodate wider ange of gas engines
BY ROBERTA PRANDI
n The Altronic VariSpark family has been completed with two more
sizes: XM and XS.