Direct Injector

The direct injector receives fuel from the fuel pump and injects it directly into the cylinder of an internal combustion engine at high pressure, according to the commands the injector receives from the electronic control unit (ECU).

 

Keihin product features

• World-class performance - This injector boasts the world's top class in terms of atomization of fuel particles, operable fuel pressure, and high-response operations. To accomplish this, the injector is performance-adjusted while quality-checked during the manufacturing process.
• Optimized responsiveness - By adopting a valve-opening mechanism that has optimized the solenoid electromagnetic circuit, this injector can respond to instructions from the electronic control unit with high-responsiveness. The flow rate variation corresponds to various engine displacements.
• Reduction of operating noise - The contact points between the engine and the injector – that normally produce radiated noise due to vibration – have been attenuated, thereby reducing the radiated noise.

Customer benefits

• Contributes to cleaner exhaust gas by reducing carbon emissions
• Global optimum delivery by Japan-North American production

Production base

• Japan, Miyagi Seisakusho
• Japan, Suzuka factory
• America, Keihin IPT Manufacturing, LLC.
• Mexico, Keihin de Mexico SA de CV

Injector for in-port injection

The in-port, or simply port, injector (PI) receives fuel sent from the fuel pump and injects the fuel into the engine port at low-pressure, according to instructions sent to it from the electronic control unit.

 

Keihin product features

• Industry's top class for low operation noise and durability/reliability - This injector exhibits minimal operation sound due to its compact size. The use of high-precision parts during assembly has allowed it to accomplish top-class durability and reliability.
• Fuel control according to engine conditions - The fuel supply amount is precisely adjusted using Keihin’s own magnetic circuit. The orifice plate design is modifiable. Variations can be made to the fuel injection shape to the engine port, making installation on various types of vehicles possible.
• Reduction of valve leakage by high-precision processing of valve seat - This injector minimizes fuel leakage by utilizing high-precision machining.
• Compliance with alcohol-containing fuels - The material used in the production of this injector allows it to be used in applications that require fuels with high alcohol content.

Customer benefits

• Low operation noise
• Proposed optimum spray shape for each engine by CAE, single reliability evaluation, or actual machine test
• Compatible with fuels containing high alcohol content
• Global optimum delivery by Japan-North American production

Production base

• Japan, Miyagi Seisakusho
• America, Keihin IPT Manufacturing, LLC.
• China, Dongguan Keihin Auto Electrodeposition Equipment Co., Ltd.

Intake Manifold

The intake manifold routes externally supplied air (via THB) to each cylinder of the engine. By evenly distributing the fresh air to mix well with the fuel, the intake manifold contributes to the improvement of engine output and fuel economy.

 

Keihin product features

• Balance of downsizing and engine output - Keihin’s intake manifold improves engine output and fuel economy while maintaining a compact size. The intake manifold for direct injection engines has a structure that allows mounting to the front of the cylinder head, where fuel is supplied, while optimizing the overall length and volume.
• Stable air supply - Each intake manifold is optimized by the visualization of flow utilizing software simulation. The smooth supply of air is the basic function of the intake manifold; therefore, by using simulation to aid in creating the overall shape, it is ensured that air is supplied to the engine in a stable and equal manner, enabling high-response by turbo vehicles.
• Reinforced structure - Reinforcement of the cavity walls to aid overall strength when mounted contributes to the overall quality and reliability of the Keihin intake manifold.

Customer benefits

• Compact engine improves freedom of vehicle design
• Contributes to improved output performance and lower fuel consumption
• Inner and outer shapes are customizable
• Quiet air flow

Production base

• Japan, Miyagi Seisakusho
• Japan, Suzuka factory
• America, Keihin IPT Manufacturing, LLC.
• America, Keihin Michigan Manufacturing, LLC.
• Mexico, Keihin de Mexico SA de CV
• Thailand, Keihin Auto Parts (Thailand) Co., Ltd.
• Indonesia, PT Keihin Indonesia
• India, Keihin India Manufacturing Pvt. Ltd.
• China, Dongguan Keihin Auto Electrodeposition Equipment Co., Ltd.

EGR Valve

The exhaust gas recirculation (EGR) valve, controlled by the electronic control unit (ECU), is used to recycle exhaust gas from the engine back to the combustion chambers of the engine. When an instruction from the ECU is received, the EGR valve turns on and a metered amount of exhaust gas from the engine is returned to the fuel/air mixture and recycled, thereby lowering the maximum temperature of the engine combustion. Lowering the temperature of the engine combustion promotes a reduction of the nitrogen oxides in exhaust gas and stable air intake and exhaust. The EGR valve contributes to lower exhaust gas emissions.

 

Keihin product features

• Highly accurate valve mechanism for controlling exhaust gas recirculation - This valve utilizes a poppet-type valve with an easy-to-set opening area, which makes it reliable in the reduction of nitrogen oxides in the exhaust gas.
• Highly responsive linear solenoid included - To ensure a recyclable flow rate, a high-response linear solenoid is installed within the valve. By ensuring the flow rate, overall fuel economy is improved.

Customer benefits

• Aids customers in their efforts to reduce nitrogen oxides
• Contributes to low-fuel consumption

Production base

• Japan, Miyagi Seisakusho
• China, Nanjing Keihin Oils & Equipment Co., Ltd.

 

Electronically-controlled throttle body for four-wheeled vehicle

The electronically-controlled throttle body supplies outside air through the intake manifold to the combustion chambers of the internal combustion engine. The amount of air passing through the throttle body valve is electronically sensed, and the information is sent to the electronic control unit (ECU) of the vehicle. The ECU determines if the throttle body valve is open enough to provide the required air for the given engine operating conditions. The continuous feedback from the throttle body to the ECU ensures proper opening and closing of the throttle body to allow the exact amount of required air flow to the engine.

 

Keihin product features

• Improved fuel economy and comfortable driving - High-accuracy throttle valve opening/closing and high-speed feedback response allow engine output control that leads to improved fuel economy and comfortable running performance.

Customer benefits

• High-fuel consumption and reduced exhaust emissions
• Comfortable running performance
• Safety

Production base

• Japan, Miyagi Seisakusho
• America, Keihin IPT Manufacturing, LLC.
• Mexico, Keihin de Mexico SA de CV
• Thailand, Keihin Auto Parts (Thailand) Co., Ltd.
• China, Dongguan Keihin Auto Electrodeposition Equipment Co., Ltd.

High-pressure hydrogen supply valve

Attached to a fuel cell vehicle, the high-pressure hydrogen supply valve is a main stop valve that serves as a high-pressure hydrogen storage tank. It is the main supply of fuel cell vehicle energy at a maximum pressure of 87.5 MPa. To supply energy, the valve flows hydrogen into and out of the storage tank during filling and power generation. It also serves as a safety mechanism by safely measuring the gas temperature inside the storage tank and discharging the hydrogen gas in case of emergency.

 

Keihin product features

• Reliable even in harsh environments - The valve has an operating temperature range of -40°C to 85°C. The robust valve structure ensures operation and sealing even in cryogenic and high-temperature environments.
• Small size that allows the valve to fit into the inner diameter of the tank mouthpiece - A solenoid valve structure designed exclusively for in-tank use, the valve fits within the inner diameter of the tank base. The valve structure is designed using aluminum forging to achieve this light weight.
• Conformity to accessory technical standards for international compressed hydrogen automobile fuel equipment (GTR No, 13)

Customer benefits

• Contributes to an improved cruising range

High-pressure hydrogen regulator

Operating with system pressure up to 87.5 MPa, the high-pressure hydrogen regulator decompresses and adjusts the hydrogen that is in the high-pressure tank of a fuel cell vehicle.

 

Keihin product features

• Compact and lightweight - This regulator exhibits Keihin's first piston pressure-receiving structure, which allows for a smaller size and weight through the adoption of an aluminum-forged body.
• Achieves excellent deadline characteristic in the whole temperature range - This regulator is a resin valve seat, which is excellent in durability and airtightness at cryogenic temperature. It achieves an excellent deadline characteristic in the whole temperature range. By applying pressure reduction technology for natural gas vehicles to the valve structure, high-precision pressure reduction is accomplished.

Customer benefits

• Contributes to the creation of a compact vehicle by reducing the size and weight of the high-pressure hydrogen system while maintaining a stable supply of hydrogen

Cathode pressure control valve

The cathode pressure control valve controls the pressure of the air supplied from the air pump to the stack. Low-partial oxygen pressure in the cathode of the fuel cell stack reduces the fuel cell voltage and the generated power, and it can reduce the life of the stack.

 

Keihin product features

• Low-cost
• Excellent in loss and flow controllability
• Optimized for corrosion resistance by utilizing stainless steel for the shaft and valve material

Customer benefits

• Contributes to the reliable pressure control in the entire operating temperature range in a fuel cell air-based system, in which a large amount of generated water is discharged.

Drain valve

The drain valve discharges the water produced by the fuel cell system outside of the car.

 

Keihin product features

• Compact size - In consideration of the operational environment the part works in, the drain valve body is made of stainless steel.
• Stainless steel construction for durability in tough environments
• Vertical integration minimizes cost - Hot forging is utilized in manufacturing this part.

Customer benefits

• The valve is small and lightweight; therefore, it contributes to a smaller fuel cell system.

Active Control Mount Solenoid (for VCM)

Active Control Mount (ACM) restrains the vibration that is conducted to the vehicle body while the engine is idling and driving through the signal from the exclusive ECU. Cylinder deactivation for the reduction of exhaust gas and improved fuel consumption causes additional engine vibration. The ACM actuator minimizes NVH by generating an opposite phase pulse in the ACM. High performance ACM is achieved by the bobbin to maintain the inside diameter of the coil is eliminated by non-fused coil wire, and the structure that molds coupler as one allows high response and high thrust force.

Spool Valve

Spool valve switches the oil passage of the rocker arm inside the engine based on the command from ECU to switch VTEC (Variable valve Timing and lift Electronic Control system). Flow consumption is reduced by using 3-way valve solenoid, yielding stable response even during low oil pressure operation. Products that meet customer needs such as lower cost version 2-way valve solenoid and complex / smaller size product utilizing experience of die cast technology and machining technology are provided.

Fuel Pipe Assembly

The Fuel Pipe Assembly incorporates the fuel distribution pipe and injectors to ensure proper assembly and guarantee against fuel leaks. The assembly of these parts also guard against contaminants introduced into these critical components. The optimum amount of the fuel that is sent from the fuel pump based on the driving conditions is injected into the intake manifold via the fuel injector from the command of the Electronic Control Unit (ECU). Due to tougher restrictions on exhaust gas in many countries, this started as a core part for optimum air / fuel mixture. Inexpensive and high precision product is provided by exact machining and assembly technology we gained through decades of carburetor work. We contribute to reduced emissions and low fuel consumption by utilizing optimum spray pattern to the engine through simulation technology, vehicle test, and cutting edge measurement technology.

 

 

 

 

Linear Solenoid Valve for AT

This is a control module for 6-speed automatic transmissions. The functions of four linear solenoid valves and three shift solenoids are integrated. As realizing light weight and small size, gear shift and clutch oil pressure are controlled very precisely to accommodate multiple steps of gear shifts. There is a line-up of optimum linear solenoids that suit the use such as high response type due to exhaust gas regulation and for fuel consumption.

Solenoid Valve

Gears are shifted within the Automatic Transmission by switching the oil passage based on the command from ECU and actuating the shift valve. Due to the fuel consumption regulations, the solenoid body was changed from steel to aluminum. The result was a reduction in weight. Additionally, the electromagnetic coil was reduced by increased efficiency through a change in the structure of the magnetic passage of the solenoid. The high thrust force solenoid specification allows a wide range of oil pressure control. The optimization of valve setting ensures oil flow even at low temperature, realizing high response switching of the shift valve.