KR20010092108A - Method and apparatus for preheating combustion chamber of a diesel engine for a motor vehicle - Google Patents

Method and apparatus for preheating combustion chamber of a diesel engine for a motor vehicle Download PDF

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Publication number
KR20010092108A
KR20010092108A KR1020000014047A KR20000014047A KR20010092108A KR 20010092108 A KR20010092108 A KR 20010092108A KR 1020000014047 A KR1020000014047 A KR 1020000014047A KR 20000014047 A KR20000014047 A KR 20000014047A KR 20010092108 A KR20010092108 A KR 20010092108A
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South Korea
Prior art keywords
preheating
combustion chamber
temperature sensor
time
turned
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KR1020000014047A
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Korean (ko)
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전찬웅
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류정열
기아자동차주식회사
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Priority to KR1020000014047A priority Critical patent/KR20010092108A/en
Publication of KR20010092108A publication Critical patent/KR20010092108A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
    • F02M31/13—Combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/302—Temperature sensors

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

PURPOSE: A preheating method and apparatus is provided to achieve an improved starting ability by setting preheating time to be different in accordance with the water coolant temperature and external air temperature. CONSTITUTION: A preheating method comprises the steps of detecting water coolant temperature and external air temperature when the starting key switch is turned on, and determining preheating time according to the detected temperature; and preheating the air contained in the combustion chamber by operating a preheating plug during the determined preset time. An apparatus comprises a water coolant temperature sensor(2); an external air temperature sensor(8); a control unit(4) for determining preheating time in accordance with the values input from the water coolant temperature sensor and external air temperature sensor and applying preheating signal, when the starting key switch is turned on; a preheating plug(6) arranged inside of the combustion chamber so as to heat the air in the combustion chamber, and which operates through a preheating relay(5) turned on/off in accordance with the preheating signal output from the control unit; and a display unit(10) arranged at a meter set(9) of an instrument panel, and which displays the preheating time determined in the control unit.

Description

자동차용 디젤 엔진의 예열 방법 및 장치{Method and apparatus for preheating combustion chamber of a diesel engine for a motor vehicle}Preheating combustion chamber of a diesel engine for a motor vehicle

본 발명은 자동차용 디젤 엔진에 관한 것이며, 보다 상세하게는 시동성 향상을 위하여 연소실 내의 흡입 공기를 예열하는 방법 및 장치에 관한 것이다.The present invention relates to an automotive diesel engine, and more particularly, to a method and apparatus for preheating intake air in a combustion chamber to improve startability.

일반적으로 높은 압력과 온도 하에서 연료가 자기 착화되는 자동차용 디젤 엔진에 있어서, 냉각 상태에서는 압축되는 공기의 누설과 열 손실에 의해 압축 압력 및 압축 온도가 낮기 때문에 디젤 엔진의 시동이 어렵다. 따라서, 일반적인 자동차용 디젤 엔진의 경우 시동성을 향상시키기 위한 예열 장치가 설치되어 있다. 예열 장치는 냉각 상태에서 디젤 엔진이 시동될 때 연소실 내의 공기를 가열하여 온도를 높임으로써 연료의 자기 착화가 용이하게 이루어지도록 한다.In general, in an automotive diesel engine in which fuel self-ignites under high pressure and temperature, it is difficult to start a diesel engine because the compression pressure and compression temperature are low due to leakage and heat loss of the compressed air in the cooled state. Therefore, in the case of a general automotive diesel engine, a preheating device for improving startability is provided. The preheater facilitates self ignition of the fuel by heating the air in the combustion chamber and raising the temperature when the diesel engine is started in the cooled state.

이러한 디젤 엔진의 시동성 개선을 위한 예열 장치가 도 1에 도시되어 있다.A preheating device for improving startability of such a diesel engine is shown in FIG. 1.

도시된 바와 같이, 예열 장치는 냉각수온 센서(2), 제어부(4), 예열 표시등(3), 예열 플러그(6)를 포함하고 있다.As shown, the preheating device includes a coolant temperature sensor 2, a control unit 4, a preheat indicator 3, and a glow plug 6.

냉각수온 센서(2)는 엔진의 냉각수온을 검출하여 그 값을 제어부(4)로 입력한다. 제어부(4)는 냉각수온 센서(2), 시동키 스위치(1), 예열 표시등(3), 및 예열 플러그(6)와 전기적으로 연결되어 있다. 예열 표시등(3)은 운전자가 용이하게 인식할 수 있도록 인스트루먼트 패널의 미터 세트 일측에 설치되어 있다. 예열 플러그(6)는 엔진의 연소실 일측으로 돌출되게 설치되어 있으며, 예열 릴레이(5)를 통해 제어부(4)와 연결되어 있다. 시동키 스위치(1), 예열 표시등(3) 및 예열 플러그(6)는 모두 배터리(7)로부터 전력을 공급받는다.The coolant temperature sensor 2 detects the coolant temperature of the engine and inputs the value to the controller 4. The control unit 4 is electrically connected to the coolant temperature sensor 2, the ignition key switch 1, the preheat indicator 3, and the glow plug 6. The preheat indicator 3 is installed on one side of the meter set of the instrument panel so that the driver can easily recognize it. The glow plug 6 is installed to protrude to one side of the combustion chamber of the engine, and is connected to the controller 4 through the preheat relay 5. The ignition key switch 1, the glow indicator 3 and the glow plug 6 are all powered from the battery 7.

시동 키 스위치가 온(ON) 모드로 전환되면, 제어부(4)는 냉각수온 센서(2)로부터 입력된 냉각수온으로부터 예열 여부를 판단한다. 냉각 수온이 낮으면 제어부(4)는 예열 플러그(6) 및 예열 표시등(3)에 각각 작동 신호를 인가한다. 이에 따라 제어부(4)와 예열 플러그(6) 사이의 릴레이가 온(ON)되어 예열 플러그(6)가 작동되고 이에 따라 연소실 내의 공기는 예열된다. 또한, 예열 표시등(3)이 점등됨으로써 운전자는 엔진이 예열 중이라는 것을 알 수 있다.When the ignition key switch is switched to the ON mode, the control unit 4 determines whether to preheat from the coolant temperature input from the coolant temperature sensor 2. If the cooling water temperature is low, the controller 4 applies an operation signal to the glow plug 6 and the glow indicator 3, respectively. As a result, the relay between the control unit 4 and the glow plug 6 is turned on so that the glow plug 6 is activated, thereby preheating the air in the combustion chamber. In addition, the preheat indicator 3 lights up so that the driver knows that the engine is warming up.

소정 시간(대략 수 초 이내)이 경과되면 제어부(4)는 예열 플러그(6) 및 예열 표시등(3)에 각각 정지 신호를 인가하여 예열 플러그(6)의 작동을 정지시키고 예열 표시등(3)을 소등시킨다.When a predetermined time (approximately within a few seconds) has elapsed, the controller 4 applies a stop signal to the glow plug 6 and the glow indicator 3, respectively, to stop the operation of the glow plug 6 and the glow indicator (3). Turn off).

예열 표시등(3)이 소등되면 운전자는 시동 키 스위치를 스타트(ST) 모드로 전환하여 엔진의 시동을 걸 수 있다.When the preheat indicator 3 goes out, the driver can start the engine by switching the start key switch to the start (ST) mode.

그러나, 상기와 같은 종래의 디젤 엔진용 예열 장치는, 냉각 수온이 소정치 이하일 경우 냉각 수온의 온도에 관계없이 항상 일정한 시간 동안만 예열 플러그가 작동되도록 설정되어 있다. 따라서, 겨울철과 같이 기온이 매우 낮은 때에는 연소실의 공기가 충분히 예열되지 않아 시동이 걸리지 않는 경우가 있다. 그 결과 운전자는 연소실 내의 공기가 충분히 예열될 때까지 엔진의 시동을 여러 번 시도해야 하는 불편함이 있다.However, the conventional preheating device for a diesel engine as described above is set such that the preheating plug is always operated only for a predetermined time regardless of the temperature of the cooling water temperature when the cooling water temperature is below a predetermined value. Therefore, when the temperature is very low, such as in winter, the air in the combustion chamber may not be sufficiently preheated, and thus the start may not be started. As a result, the driver is inconvenient to try several times to start the engine until the air in the combustion chamber is sufficiently warmed up.

또한, 종래의 디젤 엔진용 예열 장치에 있어서, 엔진의 예열은 수 초 이내에 완료되며 예열이 완료되면 예열 표시등이 소등되어 버리기 때문에 운전자가 엔진의 예열 완료 여부를 정확하게 인식하지 못하는 단점이 있었다.In addition, in the conventional preheating apparatus for diesel engines, the preheating of the engine is completed within a few seconds, and when the preheating is completed, the preheating indicator turns off so that the driver does not accurately recognize whether the preheating of the engine is completed.

본 발명은 상기와 같은 점을 감안하여 안출된 것으로, 엔진 시동이 한번에 이루어질 수 있도록 연소실의 공기를 충분히 예열할 수 있는 자동차용 디젤 엔진의 예열 방법을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object thereof is to provide a preheating method of an automotive diesel engine capable of sufficiently preheating air in a combustion chamber so that an engine can be started at once.

본 발명은 운전자에게 엔진의 예열 완료 여부를 정확하게 알릴 수 있는 자동차용 디젤 엔진의 예열 방법을 제공하는데 다른 목적이 있다.Another object of the present invention is to provide a method of preheating a diesel engine for an automobile that can accurately notify a driver whether the engine is preheated.

본 발명의 또다른 목적은 운전자에게 엔진의 예열 완료 여부를 정확하게 알릴 수 있는 자동차용 디젤 엔진의 예열 장치를 제공하는데 있다.Still another object of the present invention is to provide a preheating device for a diesel engine for an automobile that can accurately notify a driver whether the engine is preheated.

도 1은 종래의 디젤 엔진의 예열 장치의 개략도.1 is a schematic view of a preheating apparatus of a conventional diesel engine.

도 2는 본 발명의 일 실시예에 따른 디젤 엔진의 예열 장치의 개략도.2 is a schematic view of a preheating apparatus of a diesel engine according to an embodiment of the present invention.

도 3은 본 발명의 일 실시예에 따른 디젤 엔진의 예열 방법을 설명하기 위한 흐름도.3 is a flowchart illustrating a preheating method of a diesel engine according to an embodiment of the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 ; 시동키 스위치 2 ; 냉각수온 센서One ; Ignition key switch 2; Coolant temperature sensor

4 ; 제어부 6 ; 예열 플러그4 ; Control unit 6; Glow plug

8 ; 외기온 센서 10 ; 표시부8 ; Outside temperature sensor 10; Display

상기의 목적은, 시동키 스위치가 온 상태로 되면 냉각 수온 및 외기온을 검출하고 검출된 값들로부터 예열 시간을 결정하는 단계와, 결정된 예열 시간 동안 예열 플러그를 작동시켜 연소실 내의 공기를 예열하는 단계를 포함하는 본 발명에 따른 자동차용 디젤 엔진의 예열 방법에 의해 달성된다.The above objectives include detecting cooling water temperature and ambient temperature when the ignition key switch is turned on and determining a preheating time from the detected values, and preheating air in the combustion chamber by operating the preheating plug during the determined preheating time. It is achieved by the preheating method of the automotive diesel engine according to the present invention.

상기의 다른 목적은, 예열 중에는 예열이 완료될 때까지 남은 시간을 미터 세트의 표시부에 계속적으로 표시하고, 예열이 완료되면 예열 완료를 알리는 메시지를 상기 미터 세트의 표시부에 표시하는 단계를 더 포함하는 것에 의해 달성될 수 있다.Another object of the above may further include continuously displaying the time remaining until the preheating is completed on the display of the meter set, and displaying a message indicating the completion of the preheating on the display of the meter set during preheating. Can be achieved.

상기의 또다른 목적은, 냉각수온을 검출하는 냉각수온 센서; 외기온을 검출하는 외기온 센서; 시동키 스위치가 온 되면 냉각수온 센서 및 외기온 센서로부터 입력된 값으로부터 예열 시간을 결정하고 예열 신호를 인가하는 제어부; 연소실 내의 공기를 가열하도록 연소실 내에 설치되며 제어부의 예열 신호에 따라 온/오프되는 예열 릴레이를 통해 작동되는 예열 플러그; 및 미터 세트의 일측에 설치되어 제어부에서 결정된 예열 시간을 표시하는 표시부를 포함하는 본 발명에 따른 자동차용 디젤 엔진의 예열 장치에 의해 달성된다.Another object of the above, the cooling water temperature sensor for detecting the cooling water temperature; An outside air temperature sensor for detecting outside air temperature; A control unit for determining a preheating time and applying a preheating signal from values input from the coolant temperature sensor and the outside air temperature sensor when the ignition key switch is turned on; A preheating plug installed in the combustion chamber to heat air in the combustion chamber and operated through a preheating relay turned on / off according to a preheating signal of the controller; And a display unit installed at one side of the meter set and displaying a preheating time determined by the control unit.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

본 발명의 일 실시예에 따른 예열 장치가 도 2에 도시되어 있다. 설명의 명료성과 편의를 위하여 도 1에 도시된 종래의 구성과 동일한 구성에 대해서는 도 2에서도 동일한 참조 부호를 사용한다.A preheating device according to one embodiment of the invention is shown in FIG. 2. For the sake of clarity and convenience of explanation, the same reference numerals are used in FIG. 2 for the same components as the conventional configurations shown in FIG. 1.

도시된 바와 같이, 본 발명의 일 실시예에 따른 예열 장치는 냉각수온 센서(2), 외기온 센서(8), 제어부(4), 예열 플러그(6), 및 표시부(10)를 포함하고 있다.As shown, the preheating apparatus according to an embodiment of the present invention includes a cooling water temperature sensor 2, an outside air temperature sensor 8, a control unit 4, a glow plug 6, and a display unit 10.

냉각수온 센서(2)와 외기온 센서(8)는 냉각수온과 외기온을 각각 검출하고, 검출된 값을 제어부(4)로 입력한다. 예열 플러그(6)는 엔진의 연소실에 설치되어 있으며, 예열 릴레이(5)를 통해 제어부(4)와 연결되어 있다. 제어부(4)로부터 인가되는 신호에 의해 예열 릴레이(5)가 온(ON) 되면 예열 플러그(6)는 작동되어 연소실 내의 공기를 가열한다.The cooling water temperature sensor 2 and the outside air temperature sensor 8 detect the cooling water temperature and the outside air temperature, respectively, and input the detected value to the controller 4. The glow plug 6 is installed in the combustion chamber of the engine and is connected to the control part 4 via the preheat relay 5. When the preheating relay 5 is turned on by a signal applied from the controller 4, the preheating plug 6 is operated to heat air in the combustion chamber.

표시부(10)는 운전자가 용이하게 인식할 수 있도록 인스트루먼트 패널의 미터 세트(9) 일측에 설치되어 있으며 제어부(4)와 연결되어 있다. 이 표시부(10)는 숫자 및 문자를 표시할 수 있도록 LED 또는 LCD 방식이 바람직하다.The display unit 10 is installed at one side of the meter set 9 of the instrument panel so as to be easily recognized by the driver, and is connected to the control unit 4. The display unit 10 is preferably an LED or LCD system to display the numbers and letters.

이러한 구성을 가지는 본 발명의 일 실시예에 따른 예열 장치를 이용한 예열 방법을 도 3의 흐름도를 참조하여 설명하면 다음과 같다.A preheating method using a preheating apparatus according to an embodiment of the present invention having such a configuration will be described with reference to the flowchart of FIG. 3.

시동키 스위치(1)가 온(ON) 되면(S1), 냉각수온 및 외기온을 검출한다(S2). 냉각수온 및 외기온은 냉각수온 센서(2) 및 외기온 센서(8)로부터 각각 검출되어 제어부(4)로 입력된다. 제어부(4)는 검출된 냉각수온 및 외기온으로부터 예열 시간을 결정한다(S3). 예열 시간은 미리 저장된 맵으로부터 읽혀질 수도 있고 별도의 수학식을 이용하여 계산될 수도 있을 것이다.When the ignition key switch 1 is turned on (S1), the coolant temperature and the outside air temperature are detected (S2). The cooling water temperature and the outside air temperature are respectively detected from the cooling water temperature sensor 2 and the outside air temperature sensor 8 and input to the controller 4. The controller 4 determines the preheating time from the detected cooling water temperature and the outside air temperature (S3). The preheating time may be read from a pre-stored map or may be calculated using a separate equation.

예열 시간이 결정되면, 제어부(4)는 예열 신호를 인가한다. 이에 따라 예열 릴레이(5)가 온(ON) 되어, 예열 플러그(6)가 작동된다(S4). 동시에 표시부(10)는 남은 예열 시간을 제어부(4)로부터 전송받아 남은 예열 시간을 표시한다(S5).When the preheating time is determined, the control unit 4 applies a preheating signal. Thereby, the preheating relay 5 is turned ON, and the glow plug 6 is operated (S4). At the same time, the display unit 10 receives the remaining preheating time from the controller 4 and displays the remaining preheating time (S5).

예열 시간이 모두 경과되면, 즉 남은 예열 시간이 0이면, (S6) 제어부(4)는 예열 릴레이(5)에 인가된 신호를 차단하여 예열 플러그(6)의 작동을 중지시킨다(S7). 이에 따라 예열은 완료된다. 표시부(10)는 예열이 완료된 알리는 메시지를 표시한다. 이 메시지는 예를 들어 "OK", "START"와 같은 문자열일 수도 있다. 또한, 남은 시간("00:00")을 점멸시키는 것에 의해 예열 완료 메시지를 표시할 수도 있다.When all of the preheating time has elapsed, that is, the remaining preheating time is 0 (S6), the control unit 4 interrupts the signal applied to the preheating relay 5 to stop the operation of the preheating plug 6 (S7). The preheating is thus completed. The display unit 10 displays a message informing that the preheating is completed. This message may be, for example, a string such as "OK" or "START". The preheating completion message can also be displayed by flashing the remaining time ("00:00").

상기된 바와 같은 본 발명은, 냉각수온 및 외기온에 따라 예열 시간을 다르게 결정함으로써 겨울철과 같이 추울 때에도 엔진 연소실 내의 공기가 충분히 예열 될 수 있다. 따라서, 종래와 달리 한번에 시동이 이루어질 수 있는 장점이 있다. 또한, 본 발명에 따르면, 예열이 완료될 때까지 남은 시간이 표시부를 통해 표시되며 예열이 완료되면 완료 메시지가 표시되기 때문에, 운전자에게 예열 완료 여부를 정확하게 알릴 수 있는 장점도 있다.In the present invention as described above, by determining the preheating time differently according to the cooling water temperature and the outside air temperature, the air in the engine combustion chamber can be sufficiently preheated even when it is cold like winter. Therefore, unlike the prior art there is an advantage that can be started at a time. In addition, according to the present invention, since the remaining time until the preheating is completed is displayed through the display unit and the completion message is displayed when the preheating is completed, there is also an advantage that can accurately inform the driver whether the preheating is complete.

이상에서는, 본 발명을 특정의 바람직한 실시예에 대해서 도시하고 설명하였다. 그러나, 본 발명은 상술한 실시예에만 한정되는 것은 아니며 본 발명이 속하는기술 분야에서 통상의 지식을 가진 자라면 이하의 특허청구범위에 기재된 본 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경실시할 수 있을 것이다.In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains can vary as many as possible without departing from the spirit of the technical idea of the present invention described in the claims below. Modifications may be made.

Claims (3)

시동키 스위치가 온 상태로 되면 냉각 수온 및 외기온을 검출하고 검출된 값들로부터 예열 시간을 결정하는 단계와, 결정된 예열 시간 동안 예열 플러그를 작동시켜 연소실 내의 공기를 예열하는 단계를 포함하는 자동차용 디젤 엔진의 예열 방법.Detecting the cooling water temperature and the outside air temperature and determining the preheating time from the detected values when the ignition key switch is turned on; and preheating the air in the combustion chamber by operating the preheating plug during the determined preheating time. Preheating method. 제 1 항에 있어서, 예열 중에는 예열이 완료될 때까지 남은 시간을 미터 세트의 표시부에 계속적으로 표시하고, 예열이 완료되면 예열 완료를 알리는 메시지를 상기 미터 세트의 표시부에 표시하는 단계를 더 포함하는 것을 특징으로 하는 디젤 엔진의 예열 방법.The method of claim 1, further comprising: continuously displaying the time remaining until the preheating is completed on the display unit of the meter set, and when the preheating is completed, displaying a message indicating the completion of the preheating unit on the display unit of the meter set. Preheating method of the diesel engine, characterized in that. 냉각수온을 검출하는 냉각수온 센서;Cooling water temperature sensor for detecting the cooling water temperature; 외기온을 검출하는 외기온 센서;An outside air temperature sensor for detecting outside air temperature; 시동키 스위치가 온 되면 상기 냉각수온 센서 및 외기온 센서로부터 입력된 값으로부터 예열 시간을 결정하고 예열 신호를 인가하는 제어부;A control unit for determining a preheating time and applying a preheating signal from values input from the cooling water temperature sensor and the outside air temperature sensor when the ignition key switch is turned on; 연소실 내의 공기를 가열하도록 연소실 내에 설치되며 상기 제어부의 예열 신호에 따라 온/오프되는 예열 릴레이를 통해 작동되는 예열 플러그; 및A preheating plug installed in the combustion chamber to heat air in the combustion chamber and operated through a preheating relay turned on / off according to a preheating signal of the controller; And 미터 세트의 일측에 설치되어 상기 제어부에서 결정된 예열 시간을 표시하는 표시부를 포함하는 자동차용 디젤 엔진의 예열 장치.A preheating device for a diesel engine for a vehicle installed on one side of the meter set and including a display unit for displaying the preheating time determined by the control unit.
KR1020000014047A 2000-03-20 2000-03-20 Method and apparatus for preheating combustion chamber of a diesel engine for a motor vehicle KR20010092108A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005036006A1 (en) * 2005-08-01 2007-02-08 GM Global Technology Operations, Inc., Detroit Diesel engine preheating time displaying method for motor vehicle, involves rotating pointer of display instrument e.g. tachometer, for time of preheating from null point of scale to maximum value of scale with constant angular speed
KR100897094B1 (en) * 2007-11-08 2009-05-14 현대자동차주식회사 Protection Method of air heater
KR100897123B1 (en) * 2007-11-13 2009-05-14 현대자동차주식회사 Controlling method of a prehaeter for driving downhill road in diesel vehicle
CN110185559A (en) * 2019-06-29 2019-08-30 潍柴动力股份有限公司 A kind of inlet air heating control method, apparatus and system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005036006A1 (en) * 2005-08-01 2007-02-08 GM Global Technology Operations, Inc., Detroit Diesel engine preheating time displaying method for motor vehicle, involves rotating pointer of display instrument e.g. tachometer, for time of preheating from null point of scale to maximum value of scale with constant angular speed
KR100897094B1 (en) * 2007-11-08 2009-05-14 현대자동차주식회사 Protection Method of air heater
KR100897123B1 (en) * 2007-11-13 2009-05-14 현대자동차주식회사 Controlling method of a prehaeter for driving downhill road in diesel vehicle
CN110185559A (en) * 2019-06-29 2019-08-30 潍柴动力股份有限公司 A kind of inlet air heating control method, apparatus and system
CN110185559B (en) * 2019-06-29 2020-09-29 潍柴动力股份有限公司 Intake air heating control method, device and system

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