# US 5,708,306 A · Supplementary power system of an automobile

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,708,306 A
- Document ID: US5708306A
- Status: Granted
- Kind: A
- Application number: 08/803,253
- Filed: 1997-02-20
- Granted: 1998-01-13
- Earliest claimed: 1997-02-20
- Inventors: Chion-Dong Lin
- Web page: https://patentgrep.com/patent/US5708306A

## CPC

- F02G 5/00: Profiting from waste heat of combustion engines, not otherwise provided for
- F01K 23/065: {the combustion taking place in an internal combustion piston engine, e.g. a diesel engine}
- F01N 5/02: the devices using heat
- F02G 5/04: in combination with other waste heat from combustion engines
- Y02T 10/12: Improving ICE efficiencies
- F02G: HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS (steam engine plants, special vapour plants, plants operating on either hot gas or combustion-product gases together with other fluid F01K; gas-turbine plants F02C; jet-propulsion plants F02K); USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F01K: STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; nuclear power plants, engine arrangements therein G21D)
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A supplementary power system of an automobile, including a plurality of pre-heating water chambers and a steam boiler connected in series, a water circulation loop for collecting heat from the engine cooling system of the automobile for warming up water in the pre-heating water chambers, an exhaust gas guide pipe for collecting heat from the exhaust gas of the engine for heating water in the steam boiler into steam, a steam engine driven by steam from the steam boiler, an air compressor driven by the steam engine, and a pneumatic motor driven by the air compressor to transmit a driving power to the engine shaft of the automobile through a transmission belt.

## Claims

### Claim 1

A supplementary power system installed in an automobile to add a driving power to the engine shaft of the automobile, comprising:
a water reservoir;
a plurality of pre-heating water chambers connected in series to said water reservoir to receive water from said water reservoir;
a steam boiler connected in series to said pre-heating water chambers to heat water from said pre-heating water chambers to the boiling point;
a water level controller;
a plurality of one-way electromagnetic valves controlled by said water level controller to open the water passage between said water reservoir and said pre-heating water chambers respectively;
a water circulation loop connected to the engine cooling system of the automobile and passing through said pre-heating water chambers, for circulation of engine cooling water through said pre-heating water chambers, permitting water in said pre-heating water chambers to be warmed up by heat carried in water in the engine cooling water;
an exhaust gas guide pipe connected between the engine exhaust system and muffler of the automobile, and passing through said steam boiler and one pre-heating water chamber, for permitting water in said steam boiler to be heated to the boiling point by heat from the exhaust gas of the engine of the automobile;
a steam engine driven by steam from said steam boiler;
an air compressor driven by said steam engine;
a pneumatic motor driven by said air compressor and having a power output end coupled to the engine shaft of the automobile by a transmission belt; and
a steam recovery container adapted for collecting exhaust steam from said steam engine and guiding it to said water reservoir.

### Claim 2 (depends on 1)

The supplementary power system of claim 1 further comprising a pressure-induced control valve mounted between said air compressor and said pneumatic motor, said pressure-induced control valve being opened to let compressed air pass from said air compressor to said pneumatic motor when the pressure of air of said air compressor surpasses a predetermined value.