Patent ID: 7971561

Claim:
A diesel engine exhaust purifier comprising: a fuel injection valve for injecting fuel into a combustion chamber of a diesel engine; a fuel supply system for supplying fuel; a water supply feed unit for supplying water; an emulsifier feed unit for supplying emulsifier; a load detection means for detecting an accelerator pedal depression amount; a water ratio adjusting device for adjusting a water ratio from said water supply feed unit in relation to fuel from said fuel supply system; a static mixer for blending emulsified fuel from said emulsifier, said adjusted fuel and water and for supplying this emulsified fuel to said fuel injection valve; a torque deficiency judgment means for judging whether or not a torque deficiency exists relative to said accelerator pedal depression amount; and a water ratio determination means for setting a basic water ratio in which the water ratio of a larger accelerator depression amount in an engine operating range increases more than a smaller accelerator pedal depression amount in an engine operating range corresponding to accelerator pedal depression amount detected by said load detection means and for controlling said water ratio adjusting device to regulate a basic ratio when said torque deficiency judgment means judges a torque deficiency does not exist and a lower water ratio when said torque deficiency judgment means judges a torque deficiency does exist.