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公开(公告)号：US5048502A
公开(公告)日：1991-09-17
申请号：US578429
申请日：1990-09-05
Applicant: Richard A. Dykstra
Inventor： Richard A. Dykstra
IPC: F02P1/08
CPC classification number: F02P1/086
Abstract: A capacitive-discharge ignition system having a step advance is disclosed. In a preferred embodiment, the ignition thyristor is gated on at low engine speeds by a first control means in response to a primary winding output signal, and is gated on at higher engine speeds by a second control means in response to a charge winding output signal. In alternate embodiments, the first control means is responsive to a primary winding signal having a first polarity, and the second control means is responsive to a primary winding signal of the opposite polarity. The charge winding is located on a leading pole of a stator, with the primary winding disposed on a distinct, trailing pole. This arrangement enables the charge capacitor to fully charge before the ignition thyristor is gated on.
Abstract translation: 公开了一种具有步进提前的电容放电点火系统。 在优选实施例中，响应于初级绕组输出信号，第一控制装置以低发动机转速启动点火晶闸管，并且响应于充电绕组输出信号而被第二控制装置选通较高发动机转速 。 在替代实施例中，第一控制装置响应于具有第一极性的初级绕组信号，并且第二控制装置响应相反极性的初级绕组信号。 充电绕组位于定子的引导极上，初级绕组设置在不同的后极上。 这种布置使得充电电容器在点火晶闸管门控之前完全充电。
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公开(公告)号：US5024204A
公开(公告)日：1991-06-18
申请号：US546247
申请日：1990-06-29
Applicant: Richard A. Dykstra
Inventor： Richard A. Dykstra
CPC classification number: F02P1/086 , F02P5/1555 , Y02T10/46
Abstract: A continuously advancing capacitive discharge ignition system for small internal combustion engines is disclosed in which both the negative and the positive half-cycles of the control winding output signal may be used for the continuous timing advance. Gating of the ignition SCR is controlled by applying a voltage divided first control signal to the SCR gate and a phase shifted second control signal to the SCR cathode. The predetermined voltage differential between the first control signal and the second control signal, which is reached progressively earlier with increased engine speed, is used to gate on the SCR earlier as speed increases to achieve continuous timing advance.
Abstract translation: 公开了一种用于小型内燃机的连续前进电容放电点火系统，其中控制绕组输出信号的负半周期和正半周期都可以用于连续定时提前。 通过向SCR栅极施加分压的第一控制信号和向SCR阴极施加相移的第二控制信号来控制点火SCR的选通。 随着发动机转速的提高，第一控制信号和第二控制信号之间的预定电压差越早越早地被使用，随着速度的增加而先前对SCR进行选通以实现连续的定时提前。
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公开(公告)号：US4977877A
公开(公告)日：1990-12-18
申请号：US454378
申请日：1989-12-21
Applicant: Richard A. Dykstra
Inventor： Richard A. Dykstra
CPC classification number: F02P9/005
Abstract: An engine speed limiter is disclosed in which the ignition primary winding is shorted to limit engine speed whenever an ignition pulse is received by a switch at the same time that a switch is gated on by a positive output pulse from a timing circuit. A signal conditioning circuit receives a positive-going pulse from the ignition primary winding and outputs a conditioned signal to the timer to begin the timer's positive output signal. The speed limiter is suitable to be retrofit onto existing ignition systems.
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公开(公告)号：US6012420A
公开(公告)日：2000-01-11
申请号：US1178
申请日：1997-12-30
Applicant: Richard A. Dykstra , Robert K. Mitchell
Inventor： Richard A. Dykstra , Robert K. Mitchell
CPC classification number: F02M1/10 , F02D9/02 , F02M1/08 , F02D2009/0216
Abstract: An automatic choke for a small internal combustion engine uses an air vane responsive to an air flow created by a radial fan to position the choke valve during engine starting. A return spring or gravity may be used to reset the automatic choke after the engine has been stopped. The automatic choke includes a thermally-responsive device that keeps the choke at least partially open during hot restarts of the engine.
Abstract translation: 用于小型内燃机的自动扼流器使用响应于由径向风扇产生的气流的空气叶片来在发动机起动期间定位阻流阀。 发动机停止后，可以使用复位弹簧或重力来重置自动扼流圈。 自动扼流器包括热响应装置，其在发动机的热重启期间使扼流圈至少部分地打开。
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公开(公告)号：US5208519A
公开(公告)日：1993-05-04
申请号：US653081
申请日：1991-02-07
Applicant: Richard A. Dykstra , Douglas G. Janisch
Inventor： Richard A. Dykstra , Douglas G. Janisch
CPC classification number: B60K31/047 , F02D31/001 , G01P3/48
Abstract: An electronic governor is disclosed for power producing and power absorbing devices having a minimum number of component parts. Power for all of the electronic governor components is supplied by a small coil, thereby avoiding the need for an additional coil frame or other power source. In a preferred embodiment, power supply circuitry converts the alternating signal from the coil to a direct current signal to power the governor. A signal conditioner also provides a low state signal to a 555 timer to start the timing cycle. The length of the timing cycle, and thus the high state control signal output of the timer, is a function of the desired device speed. When the timer output is at a high state while at the same time the alternating signal from the coil is at its first polarity, one or more switches conduct to adjust an electromagnetic actuator. In one embodiment, the switches control a motor connected to an engine throttle and operated in a stepper mode. In another embodiment, the switch shunts a portion of the alternating signal from a capacitor connected across an electromagnetic throttle positioner, thereby partially closing the engine throttle.
Abstract translation: 公开了一种用于具有最少数量的部件的发电和电力吸收装置的电子调速器。 所有电子调速器部件的电源由小线圈提供，从而避免了对额外的线圈架或其他电源的需要。 在优选实施例中，电源电路将来自线圈的交流信号转换成直流信号以为调速器供电。 信号调节器还向555定时器提供低状态信号以启动定时周期。 定时周期的长度以及定时器的高状态控制信号输出是所需设备速度的函数。 当定时器输出处于高电平状态，同时来自线圈的交流信号处于其第一极性时，一个或多个开关导通以调节电磁致动器。 在一个实施例中，开关控制连接到发动机节气门并且以步进模式操作的电动机。 在另一个实施例中，开关将交流信号的一部分从连接在电磁节流定位器上的电容器分流，由此部分地关闭发动机节气门。
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Patent Agency Ranking
公开(公告)号：US4875448A
公开(公告)日：1989-10-24
申请号：US249341
申请日：1988-09-23
Applicant: Richard A. Dykstra
Inventor： Richard A. Dykstra
CPC classification number: F02D11/10 , F02D35/0007
Abstract: Each time throttle actuator current changes, a control voltage input to a control timer also temporarily changes. As a result, the desired set speed is temporarily changed during changes in engine throttle position so that system stability is maintained without the use of any permanent speed droop. System gain can be varied by changing the frequency of the gated oscillator while system stability can be controlled by varying the RC time constant in the differentiator network.
Abstract translation: 每当油门执行器电流变化时，输入控制定时器的控制电压也暂时变化。 结果，在发动机节气门位置的变化期间临时改变期望的设定速度，从而在不使用永久速度下降的情况下保持系统稳定性。 可以通过改变门控振荡器的频率来改变系统增益，同时可以通过改变微分器网络中的RC时间常数来控制系统稳定性。
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公开(公告)号：US4817577A
公开(公告)日：1989-04-04
申请号：US157374
申请日：1988-02-18
Applicant: Richard A. Dykstra
Inventor： Richard A. Dykstra
Abstract: A magneto ignition system includes a rotating magnet driven past a primary winding for firing the engine. The magneto generates a speed dependent signal having a following current pulse and a leading current pulse of a smaller amplitude than the following pulse. A Darlington power transistor has a collector connected in series with a voltage dropping resistor or diode to the winding. A resistor bias circuit connects the primary winding to the input of the power transistor. A cut-off transistor is connected to by-pass the bias circuit of the Darlington power transistor and thereby generate a pulse in the primary winding. A timing capacitor is connected to the primary winding in series with a diode and charging resistor. A control transistor has its input circuit connected between the timing capacitor and the resistors of the bias circuit. The control transistor responds to the differential of the bias circuit voltage and the capacitor voltage, whereby the control transistor drives the cut-off transistor to turn off the power transistor during the decreasing side of the winding circuit after it peaks at starting and low speeds and progressively increases with a gradual advance during the starting speed range, and includes a maximum advance established prior to the peak current value.
Abstract translation: 磁点火系统包括驱动通过用于点燃发动机的初级绕组的旋转磁体。 磁电机产生具有跟随电流脉冲的速度相关信号和幅度比后续脉冲小的前导电流脉冲。 达林顿功率晶体管具有与降压电阻器或二极管串联连接到绕组的集电极。 电阻偏置电路将初级绕组连接到功率晶体管的输入端。 连接截止晶体管旁路达林顿功率晶体管的偏置电路，从而在初级绕组中产生脉冲。 定时电容器与二极管和充电电阻串联连接到初级绕组。 控制晶体管的输入电路连接在定时电容器和偏置电路的电阻之间。 控制晶体管响应于偏置电路电压和电容器电压的差分，由此控制晶体管驱动截止晶体管，以在绕组电路的衰减侧在启动和低速达到峰值之后关闭功率晶体管，并且 在起始速度范围内逐渐提前逐渐增加，并且包括在峰值电流值之前建立的最大提前。
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公开(公告)号：US6145487A
公开(公告)日：2000-11-14
申请号：US466817
申请日：1999-12-17
Applicant: Richard A. Dykstra , Robert K. Mitchell
Inventor： Richard A. Dykstra , Robert K. Mitchell
CPC classification number: F02M1/10 , F02D9/02 , F02M1/08 , F02D2009/0216
Abstract: An automatic choke for a small internal combustion engine uses an air vane responsive to an air flow created by a radial fan to position the choke valve during engine starting. A return spring or gravity may be used to reset the automatic choke after the engine has been stopped. The automatic choke includes a thermally-responsive device that keeps the choke at least partially open during hot restarts of the engine.
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公开(公告)号：US5606851A
公开(公告)日：1997-03-04
申请号：US543054
申请日：1995-10-13
Applicant: Patrick J. Bruener , Paul A. Tharman , John A. Fiorenza, II , Joseph L. Pfaff , Richard A. Dykstra , William H. Reitman
Inventor： Patrick J. Bruener , Paul A. Tharman , John A. Fiorenza, II , Joseph L. Pfaff , Richard A. Dykstra , William H. Reitman
CPC classification number: A01D34/6806 , A01D34/74 , A01D34/78 , A01D34/81 , A01D34/82 , A01D34/828 , A01D2034/6843 , A01D2101/00 , Y10S56/18
Abstract: The improved battery-powered lawnmower includes a safety key that is automatically removed when the removable battery is removed, while at the same time blocking the battery recharger receptacle. The lawnmower also includes a control circuit that shuts off the lawnmower upon the occurrence of one or more of several predetermined conditions, including low battery voltage, the encountering of heavy grass for a period of 3 seconds or more, and high motor current that may occur when the cutting blade is jammed. The cutting blade is designed to move through any debris accumulated between the blade ends and the housing sidewall without sacrificing the lift for needed cutting and mulching. The invention also includes a unique height adjustment assembly for adjusting the height of the chassis, a handle attachment that allows the handle to be positively tightened to the lawnmower chassis, and a telescoping groove for the battery's quick connect/disconnect terminals.
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公开(公告)号：US06983736B2
公开(公告)日：2006-01-10
申请号：US10317761
申请日：2002-12-12
Applicant: Robert Mitchell , Richard A. Dykstra
Inventor： Robert Mitchell , Richard A. Dykstra
IPC: F02D31/00
CPC classification number: F02D11/04 , F02D31/002 , F02D2009/0203
Abstract: A stabilizer system creates a temporary droop to stabilize a governor for an internal combustion engine and reduce permanent droop and hunting of the engine. The governor adjusts the position of a throttle in response to engine speed to achieve a desired engine speed. The stabilizer system temporarily applies a force on the governor that initially resists sudden movement of the governor arm, and causes a temporary speed droop. The initial resistance of the stabilizer system helps prevent the governor from overshooting the desired speed and hunting. The temporary droop is then removed to permit the governor to achieve the desired speed to help prevent permanent droop.
Abstract translation: 稳定器系统产生临时下垂以稳定内燃机的调速器并减少发动机的永久下垂和狩猎。 调速器根据发动机转速来调节油门的位置以达到所需的发动机转速。 稳定器系统暂时在调速器上施加力，其最初抵抗调速器臂的突然移动，并且导致暂时的速度下降。 稳定器系统的初始阻力有助于防止调速器超出所需的速度和狩猎。 然后移除临时下垂以允许调速器达到所需的速度以帮助防止永久性下垂。
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