# US 5,699,767 A · Gas engine

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- Number: US 5,699,767 A
- Document ID: US5699767A
- Status: Granted
- Kind: A
- Application number: 08/549,767
- Filed: 1996-03-07
- Granted: 1997-12-23
- Earliest claimed: 1996-03-07
- Assignees: Nissan Diesel Motor Co., Ltd.
- Inventors: Ikurou Notsu; Hiroshi Matsuda; Nobuo Hamazaki; Yutaka Takada; Tatsuji Miyata; Akira Nakamura
- Web page: https://patentgrep.com/patent/US5699767A

## CPC

- F02D 19/023: {to adjust the fuel mass or volume flow}
- F02D 9/06: Exhaust brakes
- F02M 21/047: {Venturi mixer}
- F02M 21/0224: {Secondary gaseous fuel storages}
- Y02T 10/30: Use of alternative fuels, e.g. biofuels
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A control system for and exhaust retarder in and exhaust pipe of an engine to which a mixer and throttle valve are connected including terminating means for terminating fuel feed into the engine upon receipt of an exhaust retarder shutter operation signal, an oxygen richness sensor on the exhaust pipe and a control system for operating an actuator for the exhaust retarder shutter when sensed oxygen density in the exhaust pipe deviates from a predetermined oxygen range.

## Claims

### Claim 1

An exhaust retarder system for an engine having an exhaust retarder shutter in an exhaust pipe, comprising:
means for terminating fuel feed into said engine upon receipt of an exhaust retarder shutter operation signal;
an oxygen richness sensor provided on said exhaust pipe; and
a control system for operating an actuator for said exhaust retarder shutter when, based on a signal from said oxygen richness sensor, sensed oxygen density in said exhaust pipe deviates from a predetermined oxygen range.