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Class 123/351 - Engine overspeed sensing with an indicator or alarm and speed regulation


Subclass of Class 123 - Internal-combustion engines
Definition: Subject matter in which the engine speed is sensed and the
No. of patents: 43
Last issue date: 07/08/2008


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NumberTitleIssue Date
7397354Cooling system monitoring system
The invention relates to an engine cooling system monitoring system. There is a need for a cooling system monitoring system for an engine system wherein the coolant is maintained at a precise temperature. Thus, a cooling system monitoring system is provided for an e...
07/08/2008
7379810Engine control system and engine control method
An engine control system and an engine control method are disclosed wherein a combustible component quantity of intake air, reflecting combustible components in a crankcase of an engine, is calculated on the basis of a deviation between basic injection quantity for ...
05/27/2008
7095238Diagnostic method for a sensor
In a method for diagnosis of a sensor in a motor vehicle having an internal combustion engine, during operation of the motor vehicle, an output signal of the sensor is monitored for whether a maximum value of the output signal undershoots a first threshold value and...
08/22/2006
7040282Independent timing retard for engine speed limiting
A method and system for operating an engine wherein ignition of the engine is activated according to a predetermined timing schedule that references engine speed, and the ignition is suppressed above a predetermined engine speed threshold to allow engine speed to fa...
05/09/2006
6938609Method and device for controlling the drive unit of a motor vehicle
A method and arrangement for controlling the drive unit of a vehicle is suggested wherein a limiter is provided to limit the engine rpm to a pregiven limit value in at least one operating state. The limiter is controlled to be ineffective in this at least one operat...
09/06/2005
6814053Method and apparatus for limiting engine operation in a programmable range
An engine control system for a compression ignition engine employs a microprocessor-based controller that detects engine operation in a speed range previously determined to be undesirable, and responding to the detection by changing operation of the engine. In the p...
11/09/2004
6681877Working vehicle
A working vehicle is provided for improving safety and work efficiency by changing a travel speed limit appropriately depending on forms and conditions of work. The working vehicle is driven with an engine, and a working machine such as a working pump is ...
01/27/2004
6366848Engine control system for providing incentive to drivers
A method of providing an incentive in the form of increased allowable vehicle operating speed for meeting a minimum fuel economy goal. The operation of the vehicle is limited to speeds below the allowable vehicle operating speed. Signals indicative of veh...
04/02/2002
6246948Wireless intelligent vehicle speed control or monitoring system and method
A system (12) and method for automatically monitoring and/or controlling the actual speed of a vehicle (10) relative to the legal speed limit of the geographic area the vehicle is located in. A wireless transmission (32) containing location or legal speed...
06/12/2001
6052644Apparatus and method for limiting vehicle speed of a working vehicle
The present invention relates to an apparatus and a method for limiting the vehicle speed of a working vehicle which can provide a smooth traveling condition during vehicle speed limit, and which can set a vehicle speed limit suited to environmental condi...
04/18/2000
5465208Power source output control system of vehicle with travel resistance detector
A target torque is determined in a target torque determination device on the basis of an accelerator operation amount detected by an accelerator operation amount detector and power source output detected by a power source output detector. A target driving...
11/07/1995
5311063Automatic load speed controller for engine governor
A vehicle engine speed controller for automatically determining the electrical load demand made of the engine electrical system from portable auxiliary and vehicle mounted electrically operated or controlled equipment, singly or in combination, and contro...
05/10/1994
5203302Overload warning apparatus for internal combustion engines
An overload warning apparatus for an internal combustion engine, wherein a switch is mounted adjacent the throttle control plate of the carburetor such that an outwardly extending leg of the plate engages and depresses a switch upon movement of the plate ...
04/20/1993
5189618Automotive cruise control system for controlling vehicle to run at constant speed
An automotive cruise control system equipped with an actuator to regulate the state of an automobile in accordance with a control signal indicative of an actuator control amount so that the vehicle maintains a target speed, the actuator control amount bei...
02/23/1993
5121324Motor vehicle magagement and control system including solenoid actuated fuel injection timing control
An electronic integrated engine and vehicle management and control system includes an electronic vehicle control module and a fuel injection control module, in communication with each other, which together control the total vehicle and engine operation fu...
06/09/1992
4942859Safety system for an automotive engine
An accelerator sensor is provided for detecting the degree of depression of an accelerator depression pedal of a vehicle. A torque sensor is provided for detecting the output torque of the transmission. The torque detected by the torque sensor is compared...
07/24/1990
4940034Control circuit and method for controlling the speed of an electric fuel pump for an internal combustion engine equipped with fuel injection
The invention is directed to a control circuit for controlling the speed of an electric fuel pump for an internal combustion engine having fuel injection and includes a speed limit-value comparator for controlling the speed or delivery rate of the fuel pu...
07/10/1990
4941098Speed control unit for an automobile
A constant speed drive unit or cruise control in which an output approximate to a required gain characteristic is obtained from a speed signal, frequency conversion of the approximate output is carried out, and a motor is driven with a converted frequency...
07/10/1990
4856613Safety engine load sensing system
Method and apparatus for disabling an automobile powered by an engine utilizing an automatic transmission with a gear selector movable between non-drive and drive positions. After the engine is started up with the gear selector in a non-drive position, th...
08/15/1989
4811255Tachometer, RPM processor, and method
The invention comprises a tachometer for aircraft for determining engine operating parameters from magneto signals from right and left magnetos. A signal conditioning circuit receives ignition signals from at least one magneto and modifies the ignition si...
03/07/1989
4797826Speed control system for vehicles
In a speed control system for a vehicle, when a desired running speed of the vehicle is to be preset, the desired running speed of the vehicle is compared with the actual running speed so that when the resulting difference between the desired running spee...
01/10/1989
4725969Constant-speed driving system
A novel constant-speed drive system for automotive vehicles is disclosed, in which in response to an instruction for constant-speed drive while the vehicle is under acceleration, it is decided whether the vehicle acceleration at that particular time is hi...
02/16/1988
4644334Monitoring apparatus for a construction machine
A monitoring apparatus for a construction machine having an engine includes sensors for detecting abnormality conditions at various predetermined inspection positions. A warning system, cooperating with the sensors, provides an engine idling signal and a ...
02/17/1987
4615316Control method and apparatus for protecting engine from excessive wear and the like
In order to prolong the life of the engine the maximum temperature and engine speed thereof are limited in accordance with the temperature of the engine coolant by controlling the amount of fuel supplied to said engine. During "running-in" of the engine t...
10/07/1986
4597465Cruise control system and method with overspeed sensor
Cruise control system and method for maintaining a vehicle such as an automobile at a desired speed. An overspeed sensor monitors the engine speed and disengages the system in the event of a sudden increase in the engine speed, as occurs, for example, whe...
07/01/1986
4532901Engine governor with fast reference positioning and slow opening and closing movement of throttle limiter
An engine governor having overriding means for limiting the flow of fuel to an engine, means for moving the overriding means to an intermediate reference position upon actuation of the governor, and means for moving the overriding means from the reference...
08/06/1985
4531489Engine governor with reference position for throttle limiter
An engine governor having overriding means for limiting the flow of fuel to an engine, means for moving the overriding means to an intermediate reference position upon actuation of the governor, and means for moving the overriding means from the reference...
07/30/1985
4510899Electronic overspeed switch
An electrical speed control system for selectively connecting an accessory to a vehicle engine having a conventional alternator driven thereby, utilizes the voltage output of the alternator stator to determine the rotational speed of the engine, and permi...
04/16/1985
4495913Ignition current sensor for an electronic speed control system
An electronic circuit for disengaging an electronic speed control system when the rate of change of the automobile engine speed exceeds a predetermined amount is disclosed. A ferrite or powdered iron ring current transformer generates an input signal to t...
01/29/1985
4491112Failsafe for an engine control
A failsafe system for an engine-control servomotor compares a servomotor command signal to a feedback signal from the servomotor. When the magnitude of the difference between the two signals is greater than a predetermined value for a predetermined time, ...
01/01/1985
4488527Device for controlling the speed of travel of an automotive vehicle
A device for controlling the speed of travel of an automotive vehicle, having a desired-value transmitter 2 which is adjustable by a gas pedal 1 and the output signal of which can act on a setting member 5 of an element which controls the fuel/air mixture...
12/18/1984
4472777Engine control apparatus for vehicle speed
This specification discloses an engine control apparatus to limit engine speed. Various sensors can be used to generate electrical signals which are processed by logic means to generate a signal to limit engine speed. There is thus provided an additional ...
09/18/1984
4462479Overspeed engine control
Apparatus for controlling the speed of an engine of a vehicle includes a processor (26) for comparing actual speed of the engine with a reference speed and for generating output signals if the actual speed is in excess of the reference speed, the output s...
07/31/1984
4453517Control circuit for road and engine speed governor
An electronic control circuit is disclosed for an engine and load speed governor of the type comprising an overriding throttle closing device. The control circuit comprises engine speed signal generating circuit and a load speed generating circuit to prov...
06/12/1984
4385604Method and device for operation of an internal combustion engine in particular for a vehicle
Controls are provided to directly or indirectly avoid operation of the internal combustion engine of a motor vehicle in a range of speed and output power which is detrimental to engine efficiency. The controls become operative upon attainment of a predete...
05/31/1983
4355607Safety disengagement device for automotive speed control system
For use on an automotive vehicle equipped with an internal combustion engine and an automatic speed control system, a device for detecting accidental engine load removal and for providing disengagement of the speed control system to prevent an engine runa...
10/26/1982
4321901Automatic speed control device
An automatic speed control device for a vehicle or a stationary generator for emergency use is disclosed. The device comprises a speed signal detector means for generating speed pulses of a frequency proportional to a speed, a constant time generator mean...
03/30/1982
4275691Electromechanical precision governor for internal combustion engines
An electronically controlled, hydraulically actuated precision governor controls the operating RPM of an internal combustion engine by repositioning the engine throttle in response to changes in engine RPM. The piston of a hydraulic actuator is coupled to...
06/30/1981
4199039Electronic speed governor
A vehicle having an engine with a carburetor supplying fuel and having a variably positionable throttle valve, has vacuum responsive motor means operatively connected to the throttle valve for at times closing the throttle valve so as to govern the maximu...
04/22/1980
4177516Electronic digital governor
The present invention relates to an electronic digital governor for controlling the RPM of an engine. The governor is comprised of a clock generator which includes a clear pulse generator and a latch pulse generator. A sensor is provided for receiving a t...
12/04/1979
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