Honda L15 engine

The Honda L 1500cc (1,497 cc) engine (Honda L-type engine) is an in-line Water-cooled 4-cylinder gasoline engine for small cars and hybrid cars manufactured by Honda Motor Co., Ltd.

Range and History

Successor to the D model.With reduction of CO2 and improved fuel efficiency with  cleaner exhaust gas.It appeared as the second model following the K type. There is one intake and one exhaust valve, but two spark plugs are installed at diagonal positions, each of which is equipped with an ignition coil to ignite at the optimum timing and phase according to the engine speed and load. do. The intake and exhaust ports are shaped to form a swirl in the combustion chamber to improve the combustion speed. The central axis of the cylinder and crankshaft is offset in the aluminium cylinder block to reduce the frictional resistance between the piston and cylinder.

In addition, by installing an exhaust manifold at the rear of the engine, the distance between the engine and the three-way catalyst is reduced, enabling early purification of exhaust gas even when the engine is cold. Furthermore, the exhaust gas is applied obliquely to the cell surface of the catalyst to increase the contact area and improve the purification efficiency.

History 

• The Mobilio Spike announced on September 18, 2002 is equipped with the 4-valve VTEC L15A.
• The LDA of the second-generation Civic Hybrid announced on September 22, 2005 adopted the 3-stage i-VTEC with the addition of all-cylinder deactivation mode.
• The second-generation Fit announced on October 18, 2007 is equipped with i-VTEC L15A.
• The third-generation Fit, announced on September 5, 2013, engine, L15B of direct injection specification, and LEB for hybrid.
• The 5th generation Stepwagon announced on April 24, 2015 adopted the turbo specification L15B.
• The 10th generation Civic hatchback announced on July 27, 2017 adopted the high-octane L15C, which has undergone special tuning.

I-DSI+VCM 

Developed for Civic Hybrid and 2nd generation Insight. By applying a variable valve timing and lift mechanism, the intake and exhaust valves of some or all cylinders are deactivated during deceleration regeneration to simulate displacement and reduce intake and exhaust losses. As a result, the rotational energy from the tires is transmitted to the generator (motor for IMA) without waste, improving regenerative efficiency. In addition, the second-generation Civic Hybrid has a 3-stage i-VTEC (low speed range: low cam operation, high speed range: high output operation with high cam only for intake, during deceleration regeneration: suspension of intake and exhaust valves).

The 2nd generation Civic Hybrid and the 2nd generation Insight do not have an exhaust manifold, and adjacent exhaust ports are gathered in the cylinder head, and a three-way catalyst is installed immediately after that.

VTEC L15A

It has two intake and two exhaust valves, and is equipped with a variable valve timing lift mechanism to achieve both high output and practicality. It is a specification similar to " VTEC-E " which aims to improve the combustion speed by forming a swirl in the combustion chamber by stopping one of the intake valves in the low-speed range^.

i-VTEC 

L15A and later engines Similar to the VTEC mentioned above, in addition to the fuel-saving specification that deactivates one of the intake valves at low speeds and the performance specification that switches the cam profile at low and high speeds, the SOHC engine has different opening and closing timings of the intake valves at low and high speeds. There are DOHC engines with specifications that change the valve timing) and the amount of lift. The throttle valve is opened and closed by DBW. There is no exhaust manifold like the LDA late specification, and the exhaust ports are gathered in the cylinder head.

L15B 

NAMore he DOHC direct-injection engine first installed in the 3rd generation Fit. On the intake side, along with the VTC, a high-output VTEC with a low-speed cam and a high-speed cam is adopted. The compression ratio is 11.5. By reducing the diameter of the spark plug, the valve diameter is enlarged to improve intake efficiency and reduce pumping loss. For the crankshaft, the journal diameter has been reduced from 50mm to 46mm, and the balance weight has also been reduced to reduce weight.

VTEC TURBO Based on the downsizing concept, the L15B is combined with a turbocharger to achieve performance on par with the 2.0L. It was first installed in the 5th generation Stepwagon. Honda's turbo engine for registered cars is since the C20A installed in the first Legend. In addition, although it is called VTEC, the variable valve mechanism is only the phase variable type VTC, and this is the first time that it is called VTEC. The base engine had a front intake and rear exhaust, but this engine has a rear intake and front exhaust.

LEB 

The Miller cycle engine was first installed in the second-generation Fit Hybrid. Developed based on the L15B engine (NA) mentioned above, it has a displacement of 1.5L, and the fuel injection has been changed to a normal port injection and a Miller cycle. The hybrid system that can be combined was only the 1-motor SPORT HYBRID i-DCD, but the Clarity PHEV released in 2018 was equipped with the 2-motor SPORT HYBRID i-MMD. When equipped with Vezel and Jade, it is combined with the original in-cylinder fuel injection.

Variations 

L15A 

i-DSI

• Valve mechanism: SOHC chain drive intake 1 exhaust 1
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply device type: Electronically controlled fuel injection type (PGM-FI)
• Reference specs (GJ3 partner)
• Maximum output: 66 kW (90 PS) / 5,500 rpm
• Maximum torque: 131 N m (13.4 kg m) / 2,700 rpm

VTEC

• Valve mechanism: SOHC VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply device type: Electronically controlled fuel injection type (PGM-FI)
• Reference specs (GJ1 Airwave)
• Maximum output: 81 kW (110 PS) / 5,700 rpm
• Maximum torque: 143 N m (14.6 kg m) / 4,800 rpm

i-VTEC

• Valve mechanism: SOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply device type: Electronically controlled fuel injection type (PGM-FI)
• Reference specs (GE8 fit)
• Maximum output: 88 kW (120 PS) / 6,600 rpm
• Maximum torque: 145 N m (14.8 kg m) / 4,800 rpm

L15B 

NAMore

• Valve mechanism: DOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply system type: In-cylinder direct injection (PGM-FI)
• Reference specs (GK5 fit)
• Maximum output: 97 kW (132 PS) / 6,600 rpm
• Maximum torque: 155 N m (15.8 kg m) / 4,800 rpm
• Fit (GK5/6)
• Vezel (RU1/2)
• Shuttle (GK8/9)
• Grace (GM6/9)

VTEC TURBO

• Valve mechanism: DOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply system type: In-cylinder direct injection (PGM-FI)
• Reference specs (RP3 step wagon)
• Maximum output: 110kW (150PS)/5,500rpm
• Maximum torque: 203 N m (20.7 kg m) / 1,600 - 5,000 rpm
• Reference specs (RW1/2 CR-V)
• Maximum output: 140kW (190PS)/5,600rpm
• Maximum torque: 240N·m (24.5kgf·m)/2,000-5,000rpm
• Step wagon (RP3/4)
• Jade RS (FR5)
• CR-V (RW1/2)
• Vezel Touring (RU1)
• Civic Sedan (FC1)

L15C 

VTEC TURBO

• Valve mechanism: DOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply system type: In-cylinder direct injection (PGM-FI)
• Reference specs (FK7 Civic Hatchback 6MT)
• Maximum output: 134 kW (182 PS) / 5,500 rpm
• Maximum torque: 240 N m (24.5 kg m) / 1,900 - 5,000 rpm
• Reference specs (FK7 Civic Hatchback CVT)
• Maximum output: 134 kW (182 PS) / 6,000 rpm
• Maximum torque: 220 N m (22.4 kg m) / 1,700 - 5,500 rpm
• Reference specs (FL1 Civic Hatchback)
• Maximum output: 134 kW (182 PS) / 6,000 rpm
• Maximum torque: 240N m (24.5 kg m) / 1,700 - 4,500 rpm
• Civic Hatchback (FK7)
• Civic Hatchback (FL1)

L15Z 

• Valve mechanism: DOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply system type: Port injection (PGM-FI)
• Reference specs (RV3 Vezel)
• Maximum output: 87 kW (118 PS) / 6,600 rpm
• Maximum torque: 142 N m (14.5 kg m) / 4,300 rpm
• Vezel (RV3/4)

LEA 

i-VTEC

• Valve mechanism: SOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply device type: Electronically controlled fuel injection type (PGM-FI)
• Reference specs (ZF2 CR-Z)
• Maximum output: 88 kW (120 PS) / 6,600 rpm
• Maximum torque: 145 N m (14.8 kg m) / 4,800 rpm
• CR-Z (ZF2)
• Insight (ZE3)

i-DSI+VCM

• Valve mechanism: SOHC i-VTEC chain drive intake 1 exhaust 1
• Total displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply device type: Electronically controlled fuel injection type (Honda PGM-FI)
• Reference specs (GP3 Freed Hybrid)
• Maximum output: 65 kW (88 PS) / 5,400 rpm
• Maximum torque: 132 N m (13.5 kgf m) / 4,200 rpm
• Freed Hybrid (GP3)
• Freed Spike Hybrid (GP3)

LEB 

port injection

• Valve mechanism: DOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply device type: Electronically controlled fuel injection type (PGM-FI)
• Reference specs (GP5 Fit Hybrid)
• Maximum output: 81kW (110PS)/6,000rpm
• Maximum torque: 134 N m (13.7 kg m) / 5,000 rpm
• Fit Hybrid (GP5)
• Grace (GM4/5)
• Shuttle hybrid (GP7/8)
• Clarity PHEV (ZC5)
• Insight (ZE4)

direct injection

• Valve mechanism: DOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply system type: In-cylinder direct injection (PGM-FI)
• Reference specs (RU3 Vezel Hybrid)
• Maximum output: 97 kW (132 PS) / 6,600 rpm
• Maximum torque: 156 N m (15.9 kg m) / 4,600 rpm
• Vezel hybrid (RU3/4)
• Jade Hybrid (FR4)

LEC 

• Valve mechanism: DOHC i-VTEC chain drive intake 2 exhaust 2
• Displacement: 1,496cc
• Inner Diameter x Stroke: 73.0mm x 89.4mm
• Fuel supply system type: In-cylinder direct injection (PGM-FI)
• Reference specs (RV3 Vezel)
• Maximum output: 78 kW (106 PS) / 6,000 - 6,400 rpm
• Maximum torque: 127 N m (13.0 kg m) / 4,500 - 5,000 rpm
• Vezel (RV5/6)

Fitted to (not extensive)

L15A

• Honda Fit (GD3/4, GE8/9)
• Honda Fit Aria (GD8/9)
• Honda Mobilio (GB1/2)
• Honda Mobilio Spike (GK1/2)
• Honda Partner (GJ3/4)
• Honda Airwave (GJ1/2)
• Honda Freed (GB3/4)
• Honda Freed Spike (GB3/4)
• Honda Fit Shuttle (GG7/8)
• Honda City CNG 
• Honda Jazz (GE8 / 9)
• Honda City 

L15B 

• Honda Civic Sedan/Coupe Si ((FC1/FC3) 
• Honda Civic Hatchback (FK4) (FK7) (FL1)
• Honda Integra (FE1)
• Honda Accord (CV1)
• Honda Avancier (TG1)
• Honda Jade (FR5)
• Honda UR-V (TG4)
• Honda Vezel (RU1)
• Honda Inspire (CV1) 
• Honda Breeze (RY1/RY2)
• Honda XR-V (RU1)
• Honda HR-V (RU1) (RV3)
• Honda CR-V (RS3/RS4)
• Honda CR-V (RW1/RW2)
• Acura CDX

L15B 

• Honda Civic Hatchback (FK4) (FK7) (FL1)
• Honda Civic Hatchback (FK4) (FK7) (FL1)
• Acura Integra (DE4)

LEA

• Honda CR-Z (ZF1)
• Honda Fit Hybrid RS (GP4)
• Vezel hybrid (RU3/4)