Combined supercharger and supercharger coolant pump for an internal combustion engine

Claim 1

A combined supercharger compressor and pump for an internal combustion engine, comprising: a housing having a compressible fluid inlet and a compressible fluid outlet connected to an internal combusion engine; two parallel shafts journalled in said housing: rotors mounted on each of said shafts and cooperating for compressing a fluid from said compressible fluid inlet; means for supplying a rotational drive force from said engine to one of said shafts; meshing gears in said housing and mounted on said shafts for transmitting rotational drive force from said one of said shafts to the other of said shafts; an internal incompressible coolant fluid circuit in said housing, said meshing gears being positioned in said internal incompressible coolant fluid circuit, wherein said meshing gears comprise a gear pump for circulating an incompressible coolant fluid in said internal incompressible coolant fluid circuit, wherein said internal incompressible coolant fluid circuit is independent of a coolant circuit of said internal combustion engine and includes a coolant jacket in said housing and at least partially surrounding said rotors, whereby the compressed fluid is cooled by an incompressible coolant fluid in said jacket; an external incompressible coolant fluid circuit communicating with said coolant jacket for circulating an incompressible coolant fluid in a closed loop with said internal incompressible coolant fluid circuit; and a heat exchanger in said external incompressible coolant fluid circuit for cooling an incompressible coolant fluid therein, whereby the compressor can be sufficiently cooled to cool the compressible fluid being compressed thereby.