The results presented in Fig. 5 show that in all situations, except for an engine speed of 1000 rpm, enough heat is present in the engine exhaust gases to power the absorption refrigeration system. At 1000 rpm, as shown in Fig. 4(f), the maximum temperature achieved was 75 C (Table 1) and the temperature inside the refrigerator remains essentially unaltered (Fig. 5). However, for the remaining conditions, as summarized in Table 1, the generator element of the absorption refrigeration cycle could be heated within the range necessary for effective cooling of the refrigerator. The control system remains virtually inactive for lower speeds (1500 and 2000 rpm, Fig. 4(c) and (d), respectively).