CREATE TABLE table_51574 ("Season" TEXT, "Champion" TEXT, "Team" TEXT, "Chassis" TEXT, "Engine" TEXT)

In which season did Jimmy Eriksson win the championship for Team Lotus?
SELECT "Season" FROM table_51574 WHERE "Team" = 'lotus' AND "Champion" = 'jimmy eriksson'
SELECT "Season" FROM "table_51574" WHERE "Champion" = 'jimmy eriksson' AND "Team" = 'lotus'