Zajac Motors has approached engine technology from an entirely new perspective. While others seek to correct the shortcomings of traditional internal combustion Diesel engines by adding “band-aids” and extra boxes to fix increasingly difficult problems, Zajac Motors has chosen to design a more advanced combustion system that simply does not produce the problems in the first place.
Attempts to add “patch” solutions onto 125 year-old Diesel engine designs, often results in degraded fuel economy, increased cost, added complexity, and decreased reliability. The Zajac Motors approach has none of these undesirable limitations.
Below is a snapshot that explains why Zajac engine technology is in a league of its own.
The Zajac engine technology is a solution, not a fix.
DPF Diesel Particulate Filter
Filters soot from exhaust
DOC Diesel Oxidation Catalyst
Completes the “burning” of unburned hydrocarbons in exhaust
EGR Exhaust Gas Recirculation
Uses oxygen deficient exhaust gas to reduce burn temperature and NOx formation
SCR Selective Catalytic Recirculation
Ammonia injection system to eliminate NOx from exhaust
LSAF Large Surface Area Filter
LSAF filters take longer to clog and because of their large size, can cause less back pressure
HCCI Homogenous Charge Compression Ignition
Controls temperature, pressure, and fuel injection on each compression to try to eliminate flame front and NOx
, Only effective if cylinder has no hot spots or particles
, Low NOx but very high unburned hydrocarbons and carbon monoxide emissions
, Very complex. Requires 15 areas of control
Diesel engine with patented head
, at least 15% more fuel efficient
, Virtually non-polluting without the use of any costly after-treatments
, Better fuel mileage, less expensive parts to build, no after-treatment operating costs
, through elimination of unneeded parts
, due to clean burn process expanding exhaust gasses to atmospheric pressure before valve opens
, due to efficient engine and flat torque curve variable compression ratio and non-reliance on compression ignition