METHOD OF OPTIMIZING SUPERCHARGER PERFORMANCE

1 . A method of optimizing performance of a supercharger for a given application, the method comprising:

determining a desired pressure ratio of supercharger operation for the given application;

determining one of a rotor lead and a rotor speed based on the given application; and

determining the other of the rotor lead and rotor speed based on the desired pressure ratio and the one of the rotor lead and rotor speed.

2 . The method of claim 1 wherein the other of the rotor lead and rotor speed is determined based on a peak efficiency map.

3 . The method of claim 2 , further comprising determining the rotor speed based on the desired pressure ratio and the determined rotor lead.

4 . The method of claim 3 wherein the rotor speed is about 11,000 RPM based on the desired pressure ratio of 1.4 and a determined rotor lead of about 300 mm.

5 . The method of claim 3 wherein the rotor speed is about 7,500 RPM based on the desired pressure ratio of 1.4 and a determined rotor lead of about 400 mm.

6 . The method of claim 3 wherein the rotor speed is about 12,500 RPM based on the desired pressure ratio of 1.6 and a determined rotor lead of about 300 mm.

7 . The method of claim 3 wherein the rotor speed is about 15,000 RPM based on the desired pressure ratio of 1.8 and a determined rotor lead of 300 mm.

8 . The method of claim 3 wherein the rotor speed is about 10,500 RPM based on the desired pressure ratio of 1.8 and a determined rotor lead of 400 mm.

9 . A method of optimizing performance of a supercharger for a given application, the method comprising:

determining a rotor lead based on the given application;

determining a rotor speed based on the given application; and

determining a desired pressure ratio of supercharger operation for the given application based on the determined rotor lead and the rotor speed.

10 . The method of claim 9 wherein the desired pressure ratio of the supercharger is determined based on a peak efficiency map.

11 . The method of claim 10 wherein the desired pressure ratio is 1.4 for a rotor speed of about 11,000 RPM and a rotor lead of 300 mm.

12 . The method of claim 10 wherein the desired pressure ratio is 1.4 for a rotor speed of about 7,500 RPM and a rotor lead of about 400 mm.

13 . The method of claim 10 wherein the desired pressure ratio is 1.6 for a rotor speed of about 12,500 RPM and a rotor lead of about 300 mm.

14 . The method of claim 10 wherein the desired pressure ratio is 1.8 for a rotor speed of about 15,000 RPM and a rotor lead of 300 mm.

15 . A method of optimizing performance of a supercharger for a given application, the method comprising:

determining a desired pressure ratio of supercharger operation for the given application based on a peak efficiency map;

determining a rotor speed based on the given application; and

determining a desired rotor lead based on the determined desired pressure ratio and the determined rotor speed of the given application.

16 . The method of claim 15 wherein the rotor lead is about 300 mm based on the desired pressure ratio of 1.4 and a determined rotor speed of 11,000 RPM.

17 . The method of claim 15 wherein the rotor lead is about 400 mm based on the desired pressure ratio of 1.4 and a determined rotor speed of 7,500 RPM.

18 . The method of claim 15 wherein the rotor lead is about 300 mm based on the desired pressure ratio of 1.6 and a determined rotor speed of 12,500 RPM.

19 . The method of claim 15 wherein the rotor lead is about 300 mm based on the desired pressure ratio of 1.8 and a determined rotor speed of 15,000 RPM.

20 . The method of claim 15 wherein the rotor lead is about 400 mm based on a pressure ratio of 1.8 and a rotor speed of 10,500 RPM.