Waste heat utilization apparatus
First Claim
Patent Images
1. A waste heat recovery system comprising:
- a Rankine cycle including;
a heat exchanger that recovers waste heat from an engine with a refrigerant,an expander that produces power by using the refrigerant that exits the heat exchanger,a condenser that condenses the refrigerant that exits the expander, anda refrigerant pump that supplies the refrigerant that exits the condenser to the heat exchanger;
a power transmission mechanism including a belt, a pump pulley, and a crank pulley, that transmits the power regenerated by the expander to the engine; and
an engine controller, wherein;
the power transmission mechanism further includes an expander clutch to disconnect and connect the power being transmitted from the expander to the engine,the expander includes a rotational speed sensor that detects a rotational speed of the expander, andthe engine controller, when the expander clutch is disconnected, determines an increase in friction of the expander based on an increase in the rotational speed of the expander being detected by the rotational speed sensor.
5 Assignments
0 Petitions
Accused Products
Abstract
A waste heat utilization apparatus is provided with a Rankine cycle and a power transmission mechanism that transmits power regenerated by an expander to an engine. The power transmission mechanism includes an expander clutch that interrupts or permits the transmission of the power from the expander to the engine. The expander includes a rotational speed sensor that detects a rotational speed of the expander. An increase in friction of the expander is detected on the basis of an increase in the rotational speed of the expander detected by the rotational speed sensor when the expander clutch is disconnected.
23 Citations
8 Claims
-
1. A waste heat recovery system comprising:
-
a Rankine cycle including; a heat exchanger that recovers waste heat from an engine with a refrigerant, an expander that produces power by using the refrigerant that exits the heat exchanger, a condenser that condenses the refrigerant that exits the expander, and a refrigerant pump that supplies the refrigerant that exits the condenser to the heat exchanger; a power transmission mechanism including a belt, a pump pulley, and a crank pulley, that transmits the power regenerated by the expander to the engine; and an engine controller, wherein; the power transmission mechanism further includes an expander clutch to disconnect and connect the power being transmitted from the expander to the engine, the expander includes a rotational speed sensor that detects a rotational speed of the expander, and the engine controller, when the expander clutch is disconnected, determines an increase in friction of the expander based on an increase in the rotational speed of the expander being detected by the rotational speed sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification