Patent ID: 11959409
Assignee: ISUZU MOTORS LIMITED
Field: Environmental technology (Chemistry)
Classification: CPC F  Y | IPC F

Claim 4:
5. The internal-combustion-engine warm-up apparatus according to claim 3, wherein
the heat exchanger is arranged on the exhaust path,
the circulation path includes a second branch path that branches off from the exhaust path at a portion located downstream of the heat exchanger,
the internal-combustion-engine warm-up apparatus further comprises a second valve that is arranged at the portion where the second branch path branches off from the exhaust path, and switches between a state where the heated air flows through the second branch path, and a state where the heated air flows through the exhaust path, and
the control apparatus controls the first valve and the second valve, switches the first valve to the state where the heated air flows through the exhaust path, and switches the second valve to the state where the heated air flows through the second branch path before the heater and the blower are caused to operate, and thereafter causes the heater and the blower to operate to supply the heated air to the post-processing apparatus and the heat exchanger.